Photo-electrochemical ep-oxidation using environmentally friendly oxidants: Overview of recent advances in efficiently designed photo-electrode

Masoumi, Zohreh; Tayebi, Meysam; Zaib, Qammer; Lari, S. Ahmad Masoumi; Seo, Bongkuk; Lim, Choong-Sun; Yu, Seoyoon; Kim, Hyeon-Gook; Kyung, Daeseung

doi:10.1016/j.ccr.2023.215641

Cited by 5 publications

(1 citation statement)

References 128 publications

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“…However, the overall large-scale deployment of hydrogen is constrained by the slowness of the oxygen evolution reaction (OER). − Therefore, anodic glucose oxidation, which takes place at a lower potential than the OER, replaces the OER and increases energy efficiency while generating value-added products including GNA, GRA, and gluconolactone . Consequently, a closed redox cycle involving electrocatalyst oxidation of organic molecules and H 2 production provides a viable route for manufacturing solar fuels. − …”

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confidence: 99%

Production of H₂ and Glucaric Acid Using Electrocatalyst Glucose Oxidation by the Ta NiFe LDH Electrode

Tayebi,

Masoumi,

Seo

et al. 2024

ACS Appl. Mater. Interfaces

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The slow anodic oxygen evolution reaction (OER) significantly limits electrocatalytic water splitting for hydrogen production. We proposed the electrocatalyst for glucose oxidation by Ta-doping NiFe LDH nanosheets to simultaneously obtain glucaric acid (GRA) and hydrogen gas as a useful byproduct. Superior glucose oxidation reaction (GOR) activity is demonstrated by the optimized Ta–NiFe LDH, which has a low overpotential of 192 mV, allowing for a small Tafel slope of 70 mV dec–1 and a current density of 50 mA cm–2. The Ta NiFe LDH-oxidized glucose to GRA with a 72.94% yield and 64.3% Faradaic efficiency at 1.45 V RHE. Herein, we report the Ta NiFe LDH/NF electrode for the GOR&hydrogen evolution reaction (HER), which exhibits a cell voltage of 1.62 V to reach a current density of 10 mA cm–2, which is 250 mV lower compared to OER&HER (1.87 V). This study reveals that GOR is an energy-efficient and cost-effective method for producing H2 and valorizing biomass.

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Section: Introductionmentioning

confidence: 99%

Production of H₂ and Glucaric Acid Using Electrocatalyst Glucose Oxidation by the Ta NiFe LDH Electrode

Tayebi,

Masoumi,

Seo

et al. 2024

ACS Appl. Mater. Interfaces

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Boosting the Faradaic Efficiency of Br⁻‐Mediated Photoelectrochemical Epoxidation by Local Acidity on α‐Fe₂O₃

Duan,

Tang,

Yang

et al. 2024

Advanced Science

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The redox mediated photoelectrochemical (PEC) or electrochemical (EC) alkene oxidation process is a promising method to produce high value‐added epoxides. However, due to the competitive reaction of water oxidation and overoxidation of the mediator, the utilization of the electricity is far below the ideal value, where the loss of epoxidation's faradaic efficiency (FE) is ≈50%. In this study, a Br−/HOBr‐mediated method is developed to achieve a near‐quantitative selectivity and ≈100% FE of styrene oxide on α‐Fe2O3, in which low concentration of Br− as mediator and locally generated acidic micro‐environment work together to produce the higher active HOBr species. A variety of styrene derivatives are investigated with satisfied epoxidation performance. Based on the analysis of local pH‐dependent epoxidation FE and products distribution, the study further verified that HOBr serves as the true active mediator to generate the bromohydrin intermediate. It is believed that this strategy can greatly overcome the limitation of epoxidation FE to enable future industrial applications.

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Integration of TiO₂/ZnIn₂S₄ p‐n Heterojunction with Titanium Defects to Boost PEC Oxygen Production

Wang,

Song

2024

ChemCatChem

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TiO2 is a widely used photoelectric conversion semiconductor material. However, due to its selective absorption of ultraviolet light and high recombination rate of photogenerated carriers, it exhibits poor photoelectrochemical water splitting performance. In this study, intrinsic defect titanium vacancy and semiconductor recombination agents ZnIn2S4 were introduced into an anodization‐annealed TiO2 film (TiO2 NT) to enhance the photoanode activity. The activity‐enhanced TiO2 photoanode (ZIS@TiO2 NT‐EA) was characterized by surface analyses and photoelectrochemical measurements. The results indicated that the introduction of titanium vacancies into the TiO2 NT‐EA changed its semiconductor type from n to p. After the ZnIn2S4 nanoparticles were loaded on the TiO2 NT‐EA film, the carrier concentration of the ZIS@TiO2 NT‐EA increased nearly 12 times than the pristine TiO2 NT. Due to the higher carrier separation efficiency resulting from the formation of p‐n heterojunction, the photocurrent density of the ZIS@TiO2 NT‐EA reached 3.89 mA cm‐2 at 1.23 V vs. RHE, nearly 3 times higher than that of the original TiO2 NT. The maximum applied bias photon‐to‐current efficiency (ABPE) value of the ZIS@TiO2 NT EA reached 2.15% at 0.496 V vs. RHE, which is very competitive if compared with all the reported TiO2 film electrodes in the PEC water splitting application.

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Photo-electrochemical ep-oxidation using environmentally friendly oxidants: Overview of recent advances in efficiently designed photo-electrode

Cited by 5 publications

References 128 publications

Production of H₂ and Glucaric Acid Using Electrocatalyst Glucose Oxidation by the Ta NiFe LDH Electrode

Production of H₂ and Glucaric Acid Using Electrocatalyst Glucose Oxidation by the Ta NiFe LDH Electrode

Boosting the Faradaic Efficiency of Br⁻‐Mediated Photoelectrochemical Epoxidation by Local Acidity on α‐Fe₂O₃

Integration of TiO₂/ZnIn₂S₄ p‐n Heterojunction with Titanium Defects to Boost PEC Oxygen Production

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Photo-electrochemical ep-oxidation using environmentally friendly oxidants: Overview of recent advances in efficiently designed photo-electrode

Cited by 5 publications

References 128 publications

Production of H2 and Glucaric Acid Using Electrocatalyst Glucose Oxidation by the Ta NiFe LDH Electrode

Production of H2 and Glucaric Acid Using Electrocatalyst Glucose Oxidation by the Ta NiFe LDH Electrode

Boosting the Faradaic Efficiency of Br−‐Mediated Photoelectrochemical Epoxidation by Local Acidity on α‐Fe2O3

Integration of TiO2/ZnIn2S4 p‐n Heterojunction with Titanium Defects to Boost PEC Oxygen Production

Contact Info

Product

Resources

About

Production of H₂ and Glucaric Acid Using Electrocatalyst Glucose Oxidation by the Ta NiFe LDH Electrode

Production of H₂ and Glucaric Acid Using Electrocatalyst Glucose Oxidation by the Ta NiFe LDH Electrode

Boosting the Faradaic Efficiency of Br⁻‐Mediated Photoelectrochemical Epoxidation by Local Acidity on α‐Fe₂O₃

Integration of TiO₂/ZnIn₂S₄ p‐n Heterojunction with Titanium Defects to Boost PEC Oxygen Production