Metal-Compound-Based Electrocatalysts for Hydrogen Peroxide Electrosynthesis and the Electro-Fenton Process
Metal-Compound-Based Electrocatalysts for Hydrogen Peroxide Electrosynthesis and the Electro-Fenton Process
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DOI：
10.1021/acsenergylett.2c01945
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发表时间：
2022-11
影响因子：
22
通讯作者：
Hongyuan Sheng;R. Ross;J. R. Schmidt;S. Jin
中科院分区：
文献类型：
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作者：
Hongyuan Sheng;R. Ross;J. R. Schmidt;S. Jin
过氧化氢（H2 O2）是一种具有许多应用的强氧化剂，但其化学生产是不可持续和不安全的。通过选择性双电子氧还原反应（2 e-ORR）分散电合成H2 O2是一个很有吸引力的研究领域，它需要在酸性和中性溶液中具有活性、选择性、稳定性和成本效益的电催化剂。金属化合物是一类新兴的2 e-ORR催化剂，具有用于优化H2 O2电合成的多样且可调的结构基序，但它们仍然未被探索，结构-性质关系知之甚少。本焦点综述总结了金属化合物基酸性和中性2 e-ORR催化剂的最新计算和实验进展，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。从反应、催化剂、电极和器件等方面系统地讨论了影响H2 O2电合成的许多基本和实际因素。基于金属化合物的酸性2 e-ORR催化剂还可以实现用于环境修复和生物质稳定化的有效电芬顿工艺。
Hydrogen peroxide (H2O2) is a powerful oxidant with many applications, but its chemical production is unsustainable and unsafe. Decentralized electrosynthesis of H2O2via 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 H2O2is stable. Metal compounds are an emerging class of 2e–ORR catalysts with diverse and tunable structural motifs for optimizing H2O2electrosynthesis, 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 H2O2electrosynthesis are systematically discussed. Metal-compound-based acidic 2e–ORR catalysts can also enable efficient electro-Fenton processes for environmental remediation and biomass valorization.