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Metal-Compound-Based Electrocatalysts for Hydrogen Peroxide Electrosynthesis and the Electro-Fenton Process
ACS Energy Letters ( IF 19.3 ) Pub Date : 2022-11-23 , DOI: 10.1021/acsenergylett.2c01945
Hongyuan Sheng 1 , R. Dominic Ross 1 , J. R. Schmidt 1 , Song Jin 1
Affiliation  

Hydrogen peroxide (H2O2) is a powerful oxidant with many applications, but its chemical production is unsustainable and unsafe. Decentralized electrosynthesis of H2O2 via the selective two-electron oxygen reduction reaction (2e ORR) is attractive, which demands active, selective, stable, and cost-effective electrocatalysts in acidic and neutral solutions where H2O2 is stable. Metal compounds are an emerging class of 2e ORR catalysts with diverse and tunable structural motifs for optimizing H2O2 electrosynthesis, yet they remain underexplored, with poorly understood structure–property relationships. This Focus Review summarizes the recent computational and experimental developments in metal-compound-based acidic and neutral 2e ORR catalysts, and the resultant mechanistic understanding and catalyst design rules for guiding future catalyst discoveries. The many fundamental and practical factors at the reaction, catalyst, electrode, and device levels that impact H2O2 electrosynthesis are systematically discussed. Metal-compound-based acidic 2e ORR catalysts can also enable efficient electro-Fenton processes for environmental remediation and biomass valorization.

中文翻译:

用于过氧化氢电合成和电芬顿过程的金属化合物基电催化剂

过氧化氢 (H 2 O 2 ) 是一种用途广泛的强氧化剂,但其化学生产不可持续且不安全。通过选择性双电子氧还原反应 (2e – ORR) 进行的 H 2 O 2分散电合成具有吸引力,这需要在 H 2 O 2稳定的酸性和中性溶液中具有活性、选择性、稳定且具有成本效益的电催化剂。金属化合物是一类新兴的 2e - ORR 催化剂,具有多样化且可调的结构基序,用于优化 H 2 O 2电合成,但它们仍未得到充分探索,结构-性质关系知之甚少。本焦点综述总结了基于金属化合物的酸性和中性 2e - ORR 催化剂的最新计算和实验发展,以及由此产生的机理理解和催化剂设计规则,以指导未来的催化剂发现。系统地讨论了影响 H 2 O 2电合成的反应、催化剂、电极和设备级别的许多基本和实际因素。基于金属化合物的酸性 2e - ORR 催化剂还可以实现用于环境修复和生物质增值的高效电芬顿工艺。
更新日期:2022-11-23
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