High‐Surface Area Mesoporous Sc<sub>2</sub>O<sub>3</sub> with Abundant Oxygen Vacancies as New and Advanced Electrocatalyst for Electrochemical Biomass Valorization

Wu, Yufeng; Ma, Liyao; Wu, Junxiu; Song, Minwei; Wang, Changlong; Lu, Jun

doi:10.1002/adma.202311698

Cited by 10 publications

(1 citation statement)

References 76 publications

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“… Wu et al (2024) reported the first synthesis of mesoporous Sc 2 O 3 electrocatalysts rich in O v via a nano-casting method, enabling the efficient and selective oxidation of HMF to FDCA. This innovation enabled the effective and selective oxidation of HMF to FDCA.…”

Section: Anion Vacancies Promote Hmformentioning

confidence: 99%

The progress of research on vacancies in HMF electrooxidation

Chen,

Zhang,

Jiang

et al. 2024

Front. Chem.

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5-Hydroxymethylfurfural (HMF), serving as a versatile platform compound bridging biomass resource and the fine chemicals industry, holds significant importance in biomass conversion processes. The electrooxidation of HMF plays a crucial role in yielding the valuable product (2,5-furandicarboxylic acid), which finds important applications in antimicrobial agents, pharmaceutical intermediates, polyester synthesis, and so on. Defect engineering stands as one of the most effective strategies for precisely synthesizing electrocatalytic materials, which could tune the electronic structure and coordination environment, and further altering the adsorption energy of HMF intermediate species, consequently increasing the kinetics of HMF electrooxidation. Thereinto, the most routine and effective defect are the anionic vacancies and cationic vacancies. In this concise review, the catalytic reaction mechanism for selective HMF oxidation is first elucidated, with a focus on the synthesis strategies involving both anionic and cationic vacancies. Recent advancements in various catalytic oxidation systems for HMF are summarized and synthesized from this perspective. Finally, the future research prospects for selective HMF oxidation are discussed.

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Section: Anion Vacancies Promote Hmformentioning

confidence: 99%

The progress of research on vacancies in HMF electrooxidation

Chen,

Zhang,

Jiang

et al. 2024

Front. Chem.

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Lattice Strain with Stabilized Oxygen Vacancies Boosts Ceria for Robust Alkaline Hydrogen Evolution Outperforming Benchmark Pt

Liu,

Wei,

Cao

et al. 2024

Advanced Materials

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Earth‐abundant metal oxides are usually considered as stable but catalytically inert toward hydrogen evolution reaction (HER) due to their unfavorable hydrogen intermediate adsorption performance. Herein, a heavy rare earth (Y) and transition metal (Co) dual‐doping induced lattice strain and oxygen vacancy stabilization strategy is proposed to boost CeO2 toward robust alkaline HER. The induced lattice compression and increased oxygen vacancy (Ov) concentration in CeO2 synergistically improve the water dissociation on Ov sites and sequential hydrogen adsorption at activated Ov‐neighboring sites, leading to significantly enhanced HER kinetics. Meanwhile, Y doping offers stabilization effect on Ov by its stronger Y─O bonding over Ce─O, which endows the catalyst with excellent stability. The Y,Co‐CeO2 electrocatalyst exhibits an ultra‐low HER overpotential (27 mV at 10 mA cm−2) and Tafel slope (48 mV dec−1), outperforming the benchmark Pt electrocatalyst. Moreover, the anion exchange membrane water electrolyzer incorporated with Y,Co‐CeO2 achieves excellent stability of 500 h under 600 mA cm−2. This synergistic lattice strain and oxygen vacancy stabilization strategy sheds new light on the rational development of efficient and stable oxide‐based HER electrocatalysts.

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Regulating the Water Dissociation on Atomic Iron Sites to Speed Up CO₂ Protonation and Achieve pH‐Universal CO₂ Electroreduction

Tang,

Hao,

et al. 2024

Advanced Energy Materials

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Atomic Fe sites enabled electrochemical carbon dioxide (CO2) reduction (ECO2R) to carbon monoxide (CO) at low overpotentials. However, the narrow potential ranges for selective CO2 conversion on atomic Fe sites hindered the CO production at high current densities. Therefore, unveiling the CO2 electroreduction processes and clarifying the catalytic mechanisms on different atomic Fe sites are important for better design of atomic Fe catalysts toward efficient ECO2R. Herein, the ECO2R processes on single‐atom, dual‐atom, and cluster Fe sites are systematically investigated, and clarify that the balanced water dissociation and CO2 protonation on dual‐atom Fe sites promote the efficient CO production. The dual‐atom Fe catalyst achieves Faradaic efficiencies of CO (FECO) above 92% over a wide potential range of −0.4–−0.9 V versus reversible hydrogen electrode and maintains FECO of 91% after 153‐h electrolysis in H‐type cell. Benefitting from the favorable CO2 protonation for ECO2R on dual‐atom Fe sites, pH‐universal CO2 electroreduction is achieved in alkali‐/acid‐/bicarbonate‐fed membrane electrode assembly electrolyzer, with FECO exceeds 98% in strongly acidic/alkaline and neutral mediums. The work reveals a water dissociation‐promoted CO2 electroreduction on dual‐atom Fe sites and presents a feasible regulation of atomic Fe sites for highly active/selective ECO2R.

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High‐Surface Area Mesoporous Sc₂O₃ with Abundant Oxygen Vacancies as New and Advanced Electrocatalyst for Electrochemical Biomass Valorization

Cited by 10 publications

References 76 publications

The progress of research on vacancies in HMF electrooxidation

The progress of research on vacancies in HMF electrooxidation

Lattice Strain with Stabilized Oxygen Vacancies Boosts Ceria for Robust Alkaline Hydrogen Evolution Outperforming Benchmark Pt

Regulating the Water Dissociation on Atomic Iron Sites to Speed Up CO₂ Protonation and Achieve pH‐Universal CO₂ Electroreduction

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High‐Surface Area Mesoporous Sc2O3 with Abundant Oxygen Vacancies as New and Advanced Electrocatalyst for Electrochemical Biomass Valorization

Cited by 10 publications

References 76 publications

The progress of research on vacancies in HMF electrooxidation

The progress of research on vacancies in HMF electrooxidation

Lattice Strain with Stabilized Oxygen Vacancies Boosts Ceria for Robust Alkaline Hydrogen Evolution Outperforming Benchmark Pt

Regulating the Water Dissociation on Atomic Iron Sites to Speed Up CO2 Protonation and Achieve pH‐Universal CO2 Electroreduction

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High‐Surface Area Mesoporous Sc₂O₃ with Abundant Oxygen Vacancies as New and Advanced Electrocatalyst for Electrochemical Biomass Valorization

Regulating the Water Dissociation on Atomic Iron Sites to Speed Up CO₂ Protonation and Achieve pH‐Universal CO₂ Electroreduction