2024 |
Zhou S, Sun K, Toe CY, Huang J, Wang A, Yuwono J, et al., 'Solar driven ammonia synthesis with Co-TiO
Restoring ammonia from waste nitrate stands as a promising strategy for reducing reliance on the energy-intensive Haber-Bosch process and tackling environmental pollutants. Advanc... [more]
Restoring ammonia from waste nitrate stands as a promising strategy for reducing reliance on the energy-intensive Haber-Bosch process and tackling environmental pollutants. Advancing the catalytic aspects of photoelectrochemical (PEC) ammonia synthesis via waste nitrate reduction is of great importance to enhance its viability for sustainable chemical production. However, this process still suffers from low ammonia faradaic efficiency (FE) with high operational potential due to its involvement in multi-electron reactions. Herein, we integrated a cobalt-doped TiOx (Co-TiOx) cocatalyst and Ag nanowires (NWs) electron extraction layer onto TiOx/CdS/Cu2ZnSnS4 (CZTS) photocathode, achieving nearly 100 % ammonia FE and an onset potential of ~0.49 V vs. RHE. Evidenced by the in-situ synchrotron-radiated FTIR (SR-FTIR) and theoretical calculations, the increased ratio of surface oxygen vacancy sites (Vo) induced by Co-TiOx is crucial for the key reaction intermediates adsorption (i.e. *NO3 and *NO2) for subsequent ammonia production. Moreover, the transparent Ag NWs facilitates the electron extraction from TiOx/CdS/CZTS to the surface catalytic sites. Powered by CZTS solar cells, a standalone solar-to-ammonia system has been demonstrated with outstanding activity and catalytic performance.
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Nova |
2024 |
Gunawan D, Lau LY, Yuwono JA, Kumar PV, Oppong-Antwi L, Kuschnerus I, et al., 'Revealing the activity and selectivity of atomically dispersed Ni in Zn
Photoreforming enables simultaneous H2 production and organic synthesis in a one-pot system. In this study, a single-step synthesis approach was employed to fabricate atomically d... [more]
Photoreforming enables simultaneous H2 production and organic synthesis in a one-pot system. In this study, a single-step synthesis approach was employed to fabricate atomically dispersed Ni in Zn3In2S6 (NixZIS) for benzyl alcohol photoreforming. While neat ZIS exhibits high selectivity toward hydrobenzoin via C-H activation and C-C coupling, its H2 evolution rate remains below feasible levels. Incorporating Ni single atoms significantly enhances ZIS activity by improving the carrier dynamics, resulting in an optimal H2 evolution rate of 9.13 mmol g-1 h-1 on Ni4ZIS, over five times higher than neat ZIS. The presence of Ni single atoms also alters selectivity, suppressing C-C coupling products and promoting benzaldehyde generation. The Ni single atoms induce facile O-H activation following the C-H activation of benzyl alcohol on ZIS, inhibiting the desorption of carbon radicals and causing consecutive oxidation to benzaldehyde. This study elucidates the role of Ni single atoms in driving activity and selectivity during organic photoreforming.
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Nova |
2023 |
Ma Z, Wan T, Zhang D, Yuwono JA, Tsounis C, Jiang J, et al., 'Atomically Dispersed Cu Catalysts on Sulfide-Derived Defective Ag Nanowires for Electrochemical CO2 Reduction.', ACS Nano, 17 2387-2398 (2023) [C1]
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Nova |
2023 |
Haghshenas Y, Wong WP, Gunawan D, Khataee A, Keyikoglu R, Razmjou A, et al., 'Predicting the rates of photocatalytic hydrogen evolution over cocatalyst-deposited TiO
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Nova |
2023 |
Jiang Y, Toe CY, Mofarah SS, Cazorla C, Chang SLY, Yin Y, et al., 'Efficient Cocatalyst-Free Piezo-Photocatalytic Hydrogen Evolution of Defective BaTiO3-X Nanoparticles from Seawater', ACS SUSTAINABLE CHEMISTRY & ENGINEERING, (2023) [C1]
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2023 |
Zheng Z, Zhang K, Toe CY, Amal R, Deletic A, 'Photo-electrochemical oxidation flow system for stormwater herbicides removal: Operational conditions and energy consumption analysis', Science of the Total Environment, 898 (2023) [C1]
Photoelectrochemical oxidation (PECO) is a promising advanced technology for treating micropollutants in stormwater. However, it is important to understand its operation prior to ... [more]
Photoelectrochemical oxidation (PECO) is a promising advanced technology for treating micropollutants in stormwater. However, it is important to understand its operation prior to practical validation. In this study, we introduced a flow PECO system designed to evaluate its potential for full-scale applications in herbicides degradation, providing valuable insights for future large-scale implementations. The PECO flow reactor demonstrated the ability to treat a larger volume of stormwater (675 mL, approximately 10 times more than previous batch experiments) with effective removal rates of 92 % for diuron and 22 % for atrazine over 6 h of operation at 2 V. To address the large volume issue in stormwater treatment, a multiple module parallel application design is being considered to increase the treatment capacity of the PECO flow reactor. During the flow reactor operations, flow rate was found to have a notable impact on removal performance, particularly for diuron. At a flow rate of 610 mL min-1, approximately 90 % removal of diuron was achieved, while at 29 mL min-1, the removal efficiency decreased to 60 %. While light intensity had minimal effect on diuron degradation (all settings achieved over 90 % removal), it enhanced atrazine degradation from 9 % to 31 % with an increase in intensity from 63 mW cm-2 to 144 mW cm-2. Remarkably, the PECO flow system exhibited excellent removal performance (>90 % removal) for diuron even at extremely high initial pollutant concentrations (240 µg L-1), demonstrating its capacity to handle varying contaminant loads in stormwater. Energy consumption analysis revealed that flow rate as the primary factor influenced the specific energy consumption rate. Higher flow rate (e.g., 610 mL min-1) were preferable in flow reactor due to its well-balanced performance between removal and energy consumption. These findings confirm that the PECO flow system offers an efficient and promising approach for stormwater treatment applications.
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Nova |
2023 |
Jiang Y, Zhou S, Mofarah SS, Niu R, Sun Y, Rawal A, et al., 'Efficient and stable piezo-photocatalytic splitting of water and seawater by interfacial engineering of Na
Seawater splitting by piezocatalysis and piezo-photocatalysis recently has been developed as a strategy for efficient energy conversion from mechanical energy and/or renewable sol... [more]
Seawater splitting by piezocatalysis and piezo-photocatalysis recently has been developed as a strategy for efficient energy conversion from mechanical energy and/or renewable solar energy. However, the piezocatalytic hydrogen evolution reaction (HER) performance currently remain worse than those from electrolysis or photocatalysis, suffering from serious charge recombination and catalyst leaching in seawater. Herein, the present work reveals a novel nanostructure with self-generated Na0.5Bi0.5TiO3/Na0.5Bi4.5Ti4O15 (NBT/NBT4) heterojunctions, which can be engineered systematically by regulating the NaOH precursor concentration (2.5 M, 7.5 M, 12.5 M) during hydrothermal synthesis. This engineering facilitates the substitution of Bi3+ by Na+ in the NBT solid solution, which also enables the regulation of oxygen vacancy and modification of the band structure. Experimental results and associated theoretical simulation reveal the formation of heterojunction between NBT and NBT4, thereby promoting both charge transfer and charge separation. Consequently, the heterojunction (NBT-12.5 M) exhibited an efficient HER rate of 140 µmol/g/h from DI water through piezo-photocatalysis. More significantly, the heterojunction also causes notable seawater splitting capability, with the HER rates of 68 µmol/g/h from simulated seawater and 58 µmol/g/h from natural seawater. The unique nanostructure effectively suppresses the leaching of Na+ ions in simulated seawater, indicating the potential for durable and practical seawater splitting.
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2023 |
Masood H, Sirojan T, Toe CY, Kumar PV, Haghshenas Y, Sit PHL, et al., 'Enhancing prediction accuracy of physical band gaps in semiconductor materials', Cell Reports Physical Science, 4 (2023) [C1]
Accurate band-gap prediction is essential for designing and discovering new materials with desired properties. However, current methods for calculating band gaps based on local an... [more]
Accurate band-gap prediction is essential for designing and discovering new materials with desired properties. However, current methods for calculating band gaps based on local and semilocal functionals lead to significant underestimation, hindering the effectiveness of in silico and high-throughput screening of materials. We present a machine learning model with domain adaptation to rapidly yield accurate band-gap prediction of semiconductors (oxides, chalcogenides, nitrides, phosphides, etc.). The approach circumvents the prerequisite for a large amount of physically measured band-gap data, which is notoriously scarce. It instead sources knowledge from a large dataset with underestimated band gaps and subsequently transfers knowledge to train a crystal graph convolution neural network (CGCNN) using a small dataset of accurate, physically measured band gaps. The prediction model shows a low mean absolute error (MAE) of 0.23 eV, outperforming those using Perdew-Burke-Ernzerhof (PBE) functionals (MAE = 0.87 eV). Visualization of the learned crystal graph using the t-distributed stochastic neighbor embedding (t-SNE) algorithm revealed that the crystal structure and composition have a strong influence on the material band gaps.
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Nova |
2023 |
Hoang MT, Han C, Ma Z, Mao X, Yang Y, Madani SS, et al., 'Efficient CO2 Reduction to Formate on CsPbI3 Nanocrystals Wrapped with Reduced Graphene Oxide.', Nanomicro Lett, 15 161 (2023) [C1]
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Nova |
2023 |
Zhang J, Toe CY, Kumar P, Scott J, Amal R, 'Engineering defects in TiO
Photoreforming ethanol to simultaneously produce hydrogen and value-added organic products was realized over defected TiO2. Chemically induced defects in TiO2 promoted light absor... [more]
Photoreforming ethanol to simultaneously produce hydrogen and value-added organic products was realized over defected TiO2. Chemically induced defects in TiO2 promoted light absorption and charge separation, enhancing overall photoactivity. The induced defects also regulated product selectivity, leading to greater hydrogen purity and liquid to gaseous carbon ratio. The optimal catalyst generated 0.08 mmol/hr of hydrogen with a purity greater than 99 % and 0.08 mmol/hr of liquid acetaldehyde over a 6 hr timeframe. This was three times greater than the untreated TiO2. Active species trapping revealed that the preferred ethanol oxidation pathway was direct hole transfer, indicating the selectivity relies on surface chemisorption. Surface defects decreased the acetaldehyde adsorption energy, instigating its prompt desorption and suppressing overoxidation into CO2, thus improving the selectivity towards hydrogen and liquid hydrocarbon products. The work offers an alternative approach towards sustainable energy by coupling photocatalysis with waste organic utilization.
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Nova |
2023 |
Suryawanshi MP, Ghorpade UV, Toe CY, Suryawanshi UP, He M, Zhang D, et al., 'Earth-abundant photoelectrodes for water splitting and alternate oxidation reactions: Recent advances and future perspectives', Progress in Materials Science, 134 (2023) [C1]
Solar water splitting by means of photoelectrochemical (PEC) cells offers the promise to produce cost-effective renewable and clean fuel from abundant sunlight and water. Lately, ... [more]
Solar water splitting by means of photoelectrochemical (PEC) cells offers the promise to produce cost-effective renewable and clean fuel from abundant sunlight and water. Lately, the realization of promise of concurrent hydrogen (H2) production along with alternate oxidation reaction (which is less energetically demanding than the water oxidation reaction) has also become a subject of intense global research interests. At present, developing inexpensive, non-toxic, and earth-abundant semiconductor-based photoelectrodes (i.e. photocathode and photoanode) with a high stability is of great importance in achieving economically viable H2 production and value-added chemicals. This review summarizes recent advances in these photoelectrodes along with contemporary understanding of key factors responsible for high solar-to-hydrogen efficiency, device stability, and highlights a promising new research trend of alternate oxidation reactions at photoanodes. First, we outline recent developments of novel photoelectrode materials using high-throughput computational screening integrated with ab-initio calculations. We proceed to discuss the merits and major challenges of these novel and existing photoelectrodes and links the strategies used to overcome these challenges to achieve economically viable solar H2 generation. Several important studies on the emerging new trend of alternate oxidations reactions at photoanodes toward value-added chemicals are then detailed with particular emphasis is placed on dependency of photoanode design on type of organic feedstocks and desired products from the oxidation reaction. We also emphasize the development of tandem devices for overall water splitting using these photoelectrodes with high onset potentials. Finally, we provide not only promising future directions for each material system, but also a critical assessment and outlook on how these earth-abundant photoelectrodes could lead to a potential large-scale implementation of water splitting devices.
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2023 |
Han C, Kundi V, Ma Z, Toe CY, Kumar P, Tsounis C, et al., 'Differentiating the Impacts of Cu
Oxide-derived Cu catalysts from Cu2O microcrystals are capable of electrochemically converting CO2 into various value-added chemicals. However, their structural transformation and... [more]
Oxide-derived Cu catalysts from Cu2O microcrystals are capable of electrochemically converting CO2 into various value-added chemicals. However, their structural transformation and associated preferred products remain unclear, requiring further investigation. Herein, Cu2O microcrystals with controllable low- and high-index facets exposure are fabricated to differentiate the effects of initial exposed facets on their structural reconstruction and product selectivity in electrochemical CO2 reduction reaction. Combined in situ characterizations and theoretical investigation reveal the direct correlations of Cu2O reconstruction and product selectivity to its initial facet exposure. The Cu2O low-index facet, being more stable with a high energy barrier on material reduction, tends to partially maintain its original crystalline structure and larger Cu2O particle size throughout the transformation. The derived flatter surface and limited Cu2O/Cu interfaces result in a favorable selectivity toward 2-electron transfer products. The chemically active Cu2O high-index facet (311) is energetically favorable to be reduced owing to the feasible protonation process, thus experiencing a drastic reconstruction with rich newly formed Cu nanoparticles and evolved fine Cu2O grains; Such a reconstruction creates uncoordinated Cu species and abundant boundaries, benefiting charge transfer and increasing the local pH by confining OH-, thus leading to a high selectivity toward C2+ products.
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Nova |
2023 |
Gunawan D, Yuwono JA, Kumar PV, Kaleem A, Nielsen MP, Tayebjee MJY, et al., 'Unraveling the structure-activity-selectivity relationships in furfuryl alcohol photoreforming to H2 and hydrofuroin over ZnxIn2S3+x photocatalysts', Applied Catalysis B: Environmental, 335 (2023) [C1]
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Nova |
2022 |
Deng C, Toe CY, Li X, Tan J, Yang H, Hu Q, He C, 'Earth-Abundant Metal-Based Electrocatalysts Promoted Anodic Reaction in Hybrid Water Electrolysis for Efficient Hydrogen Production: Recent Progress and Perspectives', Advanced Energy Materials, 12 (2022) [C1]
Exploring advanced technologies to efficiently produce green hydrogen energy is imperative to alleviate the energy crisis and environmental pollution. Conventional overall water e... [more]
Exploring advanced technologies to efficiently produce green hydrogen energy is imperative to alleviate the energy crisis and environmental pollution. Conventional overall water electrolysis (OWE) has been regarded as a promising approach for effective H2 production, however, it is largely restricted by the sluggish kinetics of the anodic oxygen evolution reaction (OER). Coupling kinetically favorable anodic reactions, such as biomass-derived compound oxidation and pollutant degradation, with the hydrogen evolution reaction (HER) in hybrid water electrolysis (HWE), can not only solve the biomass recycling and pollutant emission problems but also save the energy cost for clean H2 generation. Hence, various advanced earth-abundant electrocatalysts have been developed to catalyze those promising anodic reactions, yet some problems such as tedious preparation and unsatisfactory performance still exist. Given the gap between research and practical applications, this review summarizes the recent progress in electrocatalysts for diverse alternative anodic oxidation reactions over the last five years together with their application in HWE systems. An in-depth understanding of different reaction mechanisms and assessments toward electrocatalysts is discussed to further enhance anodic efficiency. The advantages, differences, and critical issues of different HWE systems are thoroughly discussed as well, providing a new avenue for low-voltage H2 production from renewable resources and waste products.
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2022 |
Toe CY, Pan J, Scott J, Amal R, 'Identifying Key Design Criteria for Large-Scale Photocatalytic Hydrogen Generation from Engineering and Economic Perspectives', ACS - ES & T Engineering, 2 1130-1143 (2022)
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2022 |
Tsounis C, Subhash B, Kumar PV, Bedford NM, Zhao Y, Shenoy J, et al., 'Pt Single Atom Electrocatalysts at Graphene Edges for Efficient Alkaline Hydrogen Evolution', Advanced Functional Materials, (2022) [C1]
Graphene edges exhibit a highly localized density of states that result in increased reactivity compared to its basal plane. However, exploiting this increased reactivity to ancho... [more]
Graphene edges exhibit a highly localized density of states that result in increased reactivity compared to its basal plane. However, exploiting this increased reactivity to anchor and tune the electronic states of single atom catalysts (SACs) remains elusive. To investigate this, a method to anchor Pt SACs with ultra-low mass loadings at the edges of edge-rich vertically aligned graphene (as low as 0.71¿µg¿Pt¿cm¿2) is developed. Angle-dependent X-ray absorption spectroscopy and density-functional theory calculations reveal that edge-anchored Pt SACs has a robust coupling with the p-electrons of graphene. This interaction results in a higher occupancy of the Pt 5d orbital, shifting the d-band center toward the Fermi level, improving the adsorption of *H for the hydrogen evolution reaction (HER). Pt primarily coordinated to the graphene edge shows improved alkaline HER performance compared to Pt coordinated in mixed environments (turnover frequencies of 22.6 and 10.9¿s¿1 at an overpotential of 150¿mV, respectively). This work demonstrates an effective route to engineering the coordination environment of Pt SACs by using the graphene edge for enhanced energy conversion reactions.
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2022 |
Deng C, Tan J, Toe CY, Li X, Li G, Jiang X, et al., 'Achieving Efficient Oxygen Reduction on Ultra-Low Metal-Loaded Electrocatalysts by Constructing Well-Dispersed Bimetallic Sites and Interconnected Porous Channels', Journal of Materials Chemistry A, (2022) [C1]
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Nova |
2022 |
Ma Z, Tsounis C, Toe CY, Kumar PV, Subhash B, Xi S, et al., 'Reconstructing Cu Nanoparticle Supported on Vertical Graphene Surfaces via Electrochemical Treatment to Tune the Selectivity of CO
Reconstructing a catalyst with tunable properties is essential for achieving selective electrochemical CO2reduction reaction (CO2RR). Here, a reduction-oxidation-reduction (ROR) e... [more]
Reconstructing a catalyst with tunable properties is essential for achieving selective electrochemical CO2reduction reaction (CO2RR). Here, a reduction-oxidation-reduction (ROR) electrochemical treatment is devised to advisedly reconstruct copper nanoparticles on vertical graphene. Undercoordinated sites and oxygen vacancies constructed on the Cu active sites during the ROR treatment enhance the CO2RR activity. Moreover, by varying the oxidation potential while maintaining the reduction potential during the ROR treatment, CO2RR selectivity can be tuned between *COOH- and *OCHO-derived products. Specifically, rich grain boundaries are formed on the ROR catalyst with a high oxidation potential (+1.2 VRHE), favoring the *COOH/*OCCO adsorption and leading C-C coupling to *COOH-derived products, while the catalyst undergoing ROR at a low oxidation potential (+0.8 VRHE) lacks grain boundaries, resulting in highly selective formate (*OCHO-derived) production. Our findings are evidenced by combined in situ and ex situ characterizations and theoretical calculations.
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2022 |
Toe CY, Lamers M, Dittrich T, Tahini HA, Smith SC, Scott J, et al., 'Facet-dependent carrier dynamics of cuprous oxide regulating the photocatalytic hydrogen generation', Materials Advances, 3 2200-2212 (2022) [C1]
The intrinsic carrier dynamics of cuprous oxide (Cu2O) are known to have a crucial influence on photocatalytic performances. The photoactivity of rhombic dodecahedral Cu2O with do... [more]
The intrinsic carrier dynamics of cuprous oxide (Cu2O) are known to have a crucial influence on photocatalytic performances. The photoactivity of rhombic dodecahedral Cu2O with dominant {110} facets (RD-Cu2O) is demonstrated to surpass that of cubic Cu2O with {100} surfaces (CB-Cu2O). Time resolved microwave conductivity (TRMC) measurements reveal the higher carrier mobility of RD-Cu2O when compared to CB-Cu2O. Additionally, modulated surface photovoltage (SPV) measurements further supported the better charge separation efficiency of RD-Cu2O. Although CB-Cu2O exhibited more pronounce SPV signals, the homogeneous distribution of electrical fields drives the majority charge inward and led to detrimental charge recombination. In contrast, the weak SPV signals for RD-Cu2O were attributed to a modulated distribution of charges towards the facets and facet boundaries, demonstrating a better charge separation. This study shows that carrier dynamics and defect density should also be regarded as facet-dependent properties that can have deciding influence on the photocatalytic activity. This journal is
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2022 |
Zheng Z, Deletic A, Toe CY, Amal R, Zhang X, Pickford R, et al., 'Photo-electrochemical oxidation herbicides removal in stormwater: Degradation mechanism and pathway investigation', JOURNAL OF HAZARDOUS MATERIALS, 436 (2022) [C1]
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Nova |
2022 |
Zhou S, Sun K, Toe CY, Yin J, Huang J, Zeng Y, et al., 'Engineering a Kesterite-Based Photocathode for Photoelectrochemical Ammonia Synthesis from NOx Reduction', ADVANCED MATERIALS, 34 (2022) [C1]
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Nova |
2022 |
Gunawan D, Toe CY, Sun K, Scott J, Amal R, 'Improved carrier dynamics in nickel/urea-functionalized carbon nitride for ethanol photoreforming', PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES, 21 2115-2126 (2022) [C1]
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Nova |
2021 |
Tran-Phu T, Fusco Z, Di Bernardo I, Lipton-Duffin J, Toe CY, Daiyan R, et al., 'Understanding the Role of Vanadium Vacancies in BiVO4 for Efficient Photoelectrochemical Water Oxidation', CHEMISTRY OF MATERIALS, 33 3553-3565 (2021) [C1]
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2021 |
Lu X, Chen W, Yao Y, Wen X, Hart JN, Tsounis C, et al., 'Photogenerated charge dynamics of CdS nanorods with spatially distributed MoS2 for photocatalytic hydrogen generation', CHEMICAL ENGINEERING JOURNAL, 420 (2021) [C1]
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2021 |
Zhou S, Sun K, Huang J, Lu X, Xie B, Zhang D, et al., 'Accelerating Electron-Transfer and Tuning Product Selectivity Through Surficial Vacancy Engineering on CZTS/CdS for Photoelectrochemical CO
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2021 |
Chung HY, Toe CY, Chen W, Wen X, Wong RJ, Amal R, et al., 'Manipulating the Fate of Charge Carriers with Tungsten Concentration: Enhancing Photoelectrochemical Water Oxidation of Bi2WO6', SMALL, 17 (2021) [C1]
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2021 |
Toe CY, Tsounis C, Zhang J, Masood H, Gunawan D, Scott J, Amal R, 'Advancing photoreforming of organics: highlights on photocatalyst and system designs for selective oxidation reactions', ENERGY & ENVIRONMENTAL SCIENCE, 14 1140-1175 (2021) [C1]
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2021 |
Gunawan D, Toe CY, Kumar P, Scott J, Amal R, 'Synergistic Cyanamide Functionalization and Charge-Induced Activation of Nickel/Carbon Nitride for Enhanced Selective Photoreforming of Ethanol', ACS APPLIED MATERIALS & INTERFACES, 13 49916-49926 (2021) [C1]
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2021 |
Toe CY, Zhou S, Gunawan M, Lu X, Ng YH, Amal R, 'Recent advances and the design criteria of metal sulfide photocathodes and photoanodes for photoelectrocatalysis', JOURNAL OF MATERIALS CHEMISTRY A, 9 20277-20319 (2021) [C1]
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2021 |
Zheng Z, Zhang K, Toe CY, Amal R, Zhang X, McCarthy DT, Deletic A, 'Stormwater herbicides removal with a solar-driven advanced oxidation process: A feasibility investigation.', Water research, 190 116783 (2021) [C1]
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2020 |
Wu H, Tan HL, Toe CY, Scott J, Wang L, Amal R, Ng YH, 'Photocatalytic and Photoelectrochemical Systems: Similarities and Differences', Advanced Materials, 32 (2020) [C1]
Photocatalytic and photoelectrochemical processes are two key systems in harvesting sunlight for energy and environmental applications. As both systems are employing photoactive s... [more]
Photocatalytic and photoelectrochemical processes are two key systems in harvesting sunlight for energy and environmental applications. As both systems are employing photoactive semiconductors as the major active component, strategies have been formulated to improve the properties of the semiconductors for better performances. However, requirements to yield excellent performances are different in these two distinctive systems. Although there are universal strategies applicable to improve the performance of photoactive semiconductors, similarities and differences exist when the semiconductors are to be used differently. Here, considerations on selected typical factors governing the performances in photocatalytic and photoelectrochemical systems, even though the same type of semiconductor is used, are provided. Understanding of the underlying mechanisms in relation to their photoactivities is of fundamental importance for rational design of high-performing photoactive materials, which may serve as a general guideline for the fabrication of good photocatalysts or photoelectrodes toward sustainable solar fuel generation.
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2020 |
Gao W, Liang S, Wang R, Jiang Q, Zhang Y, Zheng Q, et al., 'Industrial carbon dioxide capture and utilization: state of the art and future challenges', CHEMICAL SOCIETY REVIEWS, 49 8584-8686 (2020) [C1]
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2020 |
Ma Z, Tsounis C, Kumar PV, Han Z, Wong RJ, Toe CY, et al., 'Enhanced Electrochemical CO2 Reduction of Cu@CuxO Nanoparticles Decorated on 3D Vertical Graphene with Intrinsic sp(3)-type Defect', ADVANCED FUNCTIONAL MATERIALS, 30 (2020) [C1]
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2020 |
Liu Y, Yang J, Liu Y, Zheng J, Lee W, Shi J, et al., 'Manipulation of planar oxygen defect arrangements in multifunctional magneli titanium oxide hybrid systems: from energy conversion to water treatment', ENERGY & ENVIRONMENTAL SCIENCE, 13 5080-5096 (2020) [C1]
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2020 |
Lu X, Toe CY, Ji F, Chen W, Wen X, Wong RJ, et al., 'Light-Induced Formation of MoOxSy Clusters on CdS Nanorods as Cocatalyst for Enhanced Hydrogen Evolution', ACS APPLIED MATERIALS & INTERFACES, 12 8324-8332 (2020) [C1]
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2020 |
Wu H, Zheng Z, Toe CY, Wen X, Hart JN, Amal R, Ng YH, 'A pulse electrodeposited amorphous tunnel layer stabilises Cu2O for efficient photoelectrochemical water splitting under visible-light irradiation', JOURNAL OF MATERIALS CHEMISTRY A, 8 5638-5646 (2020) [C1]
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2020 |
Wu X, Toe CY, Su C, Ng YH, Amal R, Scott J, 'Preparation of Bi-based photocatalysts in the form of powdered particles and thin films: a review', JOURNAL OF MATERIALS CHEMISTRY A, 8 15302-15318 (2020) [C1]
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2020 |
Lu X, Hart JN, Yao Y, Toe CY, Scott J, Ng YH, 'Cu2O photocatalyst: Activity enhancement driven by concave surface', MATERIALS TODAY ENERGY, 16 (2020) [C1]
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2020 |
Tsounis C, Wang Y, Arandiyan H, Wong RJ, Toe CY, Amal R, Scott J, 'Tuning the Selectivity of LaNiO3 Perovskites for CO2 Hydrogenation through Potassium Substitution', CATALYSTS, 10 (2020) [C1]
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2019 |
Toe CY, Scott J, Amal R, Ng YH, 'Recent advances in suppressing the photocorrosion of cuprous oxide for photocatalytic and photoelectrochemical energy conversion', JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS, 40 191-211 (2019) [C1]
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2019 |
Park CK, Gharavi PSM, Kurnia F, Zhang Q, Toe CY, Al-Farsi M, et al., 'GaP-ZnS Multilayer Films: Visible-Light Photoelectrodes by Interface Engineering', JOURNAL OF PHYSICAL CHEMISTRY C, 123 3336-3342 (2019) [C1]
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2019 |
Masood H, Toe CY, Teoh WY, Sethu V, Amal R, 'Machine Learning for Accelerated Discovery of Solar Photocatalysts', ACS CATALYSIS, 9 11774-11787 (2019) [C1]
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2018 |
Toe CY, Zheng Z, Wu H, Scott J, Amal R, Ng YH, 'Photocorrosion of Cuprous Oxide in Hydrogen Production: Rationalising Self-Oxidation or Self-Reduction', ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 57 13613-13617 (2018) [C1]
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2018 |
Toe CY, Zheng Z, Wu H, Scott J, Amal R, Ng YH, 'Transformation of Cuprous Oxide into Hollow Copper Sulfide Cubes for Photocatalytic Hydrogen Generation', JOURNAL OF PHYSICAL CHEMISTRY C, 122 14072-14081 (2018) [C1]
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2018 |
Li S, Li L, Tang Y, Toe CY, Wu H, Chung HY, et al., 'Pulsed Electrodeposition of Co3O4 Nanocrystals on One-Dimensional ZnO Scaffolds for Enhanced Electrochemical Water Oxidation', CHEMPLUSCHEM, 83 889-889 (2018)
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2018 |
Wu H, Li S, Lu X, Toe CY, Chung HY, Tang Y, et al., 'Pulsed Electrodeposition of Co3O4 Nanocrystals on One-Dimensional ZnO Scaffolds for Enhanced Electrochemical Water Oxidation', CHEMPLUSCHEM, 83 934-940 (2018) [C1]
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2017 |
Toe CY, Tan HL, Boyer C, Rawal A, Thickett SC, Scott J, et al., 'Photo-driven synthesis of polymer-coated platinized ZnO nanoparticles with enhanced photoelectrochemical charge transportation', JOURNAL OF MATERIALS CHEMISTRY A, 5 4568-4575 (2017) [C1]
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2016 |
Jing L, Shim K, Toe CY, Fang T, Zhao C, Amal R, et al., 'Electrospun Polyacrylonitrile-Ionic Liquid Nanofibers for Superior PM2.5 Capture Capacity', ACS APPLIED MATERIALS & INTERFACES, 8 7030-7036 (2016) [C1]
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