ZnO nanoparticles embedded in hollow carbon fiber membrane for electrochemical H2O2 production by two-electron water oxidation reaction
ZnO nanoparticles embedded in hollow carbon fiber membrane for electrochemical H2O2 production by two-electron water oxidation reaction
复制标题
嵌入中空碳纤维膜中的 ZnO 纳米粒子用于通过双电子水氧化反应电化学生产 H2O2
DOI：
10.1016/j.envres.2021.112290
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发表时间：
2022
影响因子：
8.3
通讯作者：
Yu Chengzhong
中科院分区：
文献类型：
--
作者：
Zhang Chaoqi;Lu Jingyi;Liu Chao;Zou Yingying;Yuan Ling;Wang Jing;Yu Chengzhong
Electrochemical two-electron water oxidation reaction (2e-WOR) provides a promising alternative route for hydrogen peroxide (H2O2) production, where the design of earth abundant and environmentally friendly electrocatalysts with both high selectivity and production rate is crucial. Here we report the synthesis of ZnO nanoparticles embedded in hollow carbon fiber membrane as efficient 2e-WOR electrocatalyst by a metal-organic framework engaged electrospinning-pyrolysis method. The resultant ZnO@carbon composite fiber exhibits a foam-like hierarchical structure composed of interconnected hollow carbon nanocubes encapsulated with oxygen vacancy rich ZnO nanocrystals. Owing to the improved selectivity of ZnO, excellent conductivity of carbon fiber, promoted active site exposure and mass transfer of hollow structure, the free-standing membrane electrode shows superior 2e-WOR performances with high selectivity (83.8% at 2.8 V vs. RHE), H2O2generation rate (19.7 μmol cm−2min−1) and robust stability.
