Fe−O<sub>4</sub> Motif Activated Graphitic Carbon via Oxo‐Bridge for Highly Selective H<sub>2</sub>O<sub>2</sub> Electrosynthesis
Zitao Zhang, Weibin Chen, Hsing Kai Chu, Feng Xiong, Kexin Zhang, Huacai Yan, Fanqi Meng, Song Gao, Bing Ma, Hai Xiao, Ruqiang Zou
Abstract
Abstract Carbon‐based materials have been utilized as effective catalysts for hydrogen peroxide electrosynthesis via two‐electron oxygen reduction reaction (2 e ORR), however the insufficient selectivity and productivity still hindered the further industrial applications. In this work, we report the Fe−O 4 motif activated graphitic carbon material which enabled highly selective H 2 O 2 electrosynthesis operating at high current density with excellent anti‐poisoning property. In the bulk production test, the concentration of H 2 O 2 cumulated to 8.6 % in 24 h and the corresponding production rate of 33.5 mol g cat −1 h −1 outperformed all previously reported materials. Theoretical model backed by in situ characterization verified α‐C surrounding the Fe−O 4 motif as the actual reaction site in terms of thermodynamics and kinetics aspects. The strategy of activating carbon reaction site by metal center via oxo‐bridge provides inspiring insights for the rational design of carbon materials for heterogeneous catalysis.