Vacancy‐Activated B‐Doping for Efficient 2e‐ Oxygen Reduction through Suppressing H2O2 Decomposition at High Overpotential DOI Open Access

Wangyang Cui,

Zhiyuan Zhen, Yuanyuan Sun

et al.

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

Abstract The production of hydrogen peroxide (H 2 O ) through two‐electron oxygen reduction reaction (2e − ORR) has emerged as a more environmentally friendly alternative to the traditional anthraquinone method. Although oxidized carbon catalysts have intensive developed due their high selectivity and activity, yield conversion rate H under overpotential still limited. produced was rapidly consumed by increased intensity reduction, which could ascribe decomposition radicals voltage in catalyst. To overcome this issue, B doped been catalyze 2e ORR with efficient suppressing at potential. Thus, thermal reducing containing groups (OCGs) on graphite construct defects vacancies, situ convert B−C x subunits edge graphene sheets. introduction effectively prevented *O−O bond provided suitable adsorption capacity for *OOH, achieving excellent across wide range. Finally, remarkable 7.91 mmol cm −2 h −1 delivered an industrial current density 600 mA , provide “green” pathway scale‐upable synthesis .

Language: Английский

Vacancy‐Activated B‐Doping for Efficient 2e‐ Oxygen Reduction through Suppressing H2O2 Decomposition at High Overpotential DOI Open Access

Wangyang Cui,

Zhiyuan Zhen, Yuanyuan Sun

et al.

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

Abstract The production of hydrogen peroxide (H 2 O ) through two‐electron oxygen reduction reaction (2e − ORR) has emerged as a more environmentally friendly alternative to the traditional anthraquinone method. Although oxidized carbon catalysts have intensive developed due their high selectivity and activity, yield conversion rate H under overpotential still limited. produced was rapidly consumed by increased intensity reduction, which could ascribe decomposition radicals voltage in catalyst. To overcome this issue, B doped been catalyze 2e ORR with efficient suppressing at potential. Thus, thermal reducing containing groups (OCGs) on graphite construct defects vacancies, situ convert B−C x subunits edge graphene sheets. introduction effectively prevented *O−O bond provided suitable adsorption capacity for *OOH, achieving excellent across wide range. Finally, remarkable 7.91 mmol cm −2 h −1 delivered an industrial current density 600 mA , provide “green” pathway scale‐upable synthesis .

Language: Английский

Citations

2
Enhanced Electrocatalytic Hydrogen Peroxide Production via a CuWO4/WO3 Heterojunction with High Selectivity and Stability DOI
Yu Liu, Hongxiao Liu, Junning Qian

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 12, 2025

The electrocatalytic conversion of oxygen to hydrogen peroxide offers a promising pathway for sustainable energy production. However, the development catalysts that are highly active, stable, and cost-effective synthesis remains significant challenge. In this study, novel polyacid–based metal–organic coordination compound (Cu–PW) was synthesized using hydrothermal approach. Cu–PW served as precursor construct composite electrocatalyst featuring heterointerface between CuWO4 WO3 (CuWO4/WO3) through pyrolysis. CuWO4/WO3 heterojunction exhibits an impressive H2O2 selectivity 91.84% at 0.5 V, marking 19.65% improvement compared pristine Cu–PW. Furthermore, catalyst demonstrates exceptional stability, maintaining continuous operation 29 h. At 0.1 it delivers yield 1537.8 mmol g–1 h–1, with Faraday efficiency (FE) 85%. Additionally, effectively degrades methyl blue, achieving 95% removal from aqueous system within 30 min. Theoretical analysis further corroborates high electroactivity structure. Cu–O–W bridge formed during reaction facilitates interfacial electron transport enhances role W–O bond in proton adsorption transfer kinetics. This strong coupling promotes formation *OOH intermediates, thereby favoring generation. Hence, as-prepared great potential efficient green peroxide, exhibiting two-electron reduction catalyst. work new approach fabricating selectivity, paving way production, significantly reducing reliance on conventional anthraquinone process.

Language: Английский

Citations

1
Vacancy‐Activated B‐Doping for Efficient 2e‐ Oxygen Reduction through Suppressing H2O2 Decomposition at High Overpotential DOI Open Access

Wangyang Cui,

Zhiyuan Zhen, Yuanyuan Sun

et al.

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

Abstract The production of hydrogen peroxide (H 2 O ) through two‐electron oxygen reduction reaction (2e − ORR) has emerged as a more environmentally friendly alternative to the traditional anthraquinone method. Although oxidized carbon catalysts have intensive developed due their high selectivity and activity, yield conversion rate H under overpotential still limited. produced was rapidly consumed by increased intensity reduction, which could ascribe decomposition radicals voltage in catalyst. To overcome this issue, B doped been catalyze 2e ORR with efficient suppressing at potential. Thus, thermal reducing containing groups (OCGs) on graphite construct defects vacancies, situ convert B−C x subunits edge graphene sheets. introduction effectively prevented *O−O bond provided suitable adsorption capacity for *OOH, achieving excellent across wide range. Finally, remarkable 7.91 mmol cm −2 h −1 delivered an industrial current density 600 mA , provide “green” pathway scale‐upable synthesis .

Language: Английский

Citations

0