CoIn dual-atom catalyst for hydrogen peroxide production via oxygen reduction reaction in acid

作者：Jiannan Du, Guokang Han, Wei Zhang, Lingfeng Li, Yuqi Yan, Yaoxuan Shi, Xue Zhang, Lin Geng, Zhijiang Wang, Yueping Xiong, Geping Yin, Chunyu Du · 发表于：Nature Communications · 年份：2023 · DOI：10.1038/s41467-023-40467-8 · 被引用次数：189 · 研究领域：Electrocatalysts for Energy Conversion、Advanced battery technologies research、Catalytic Processes in Materials Science

Abstract The two-electron oxygen reduction reaction in acid is highly attractive to produce H 2 O 2 , a commodity chemical vital in various industry and household scenarios, which is still hindered by the sluggish reaction kinetics. Herein, both density function theory calculation and in-situ characterization demonstrate that in dual-atom CoIn catalyst, O-affinitive In atom triggers the favorable and stable adsorption of hydroxyl, which effectively optimizes the adsorption of OOH on neighboring Co. As a result, the oxygen reduction on Co atoms shifts to two-electron pathway for efficient H 2 O 2 production in acid. The H 2 O 2 partial current density reaches 1.92 mA cm −2 at 0.65 V in the rotating ring-disk electrode test, while the H 2 O 2 production rate is as high as 9.68 mol g −1 h −1 in the three-phase flow cell. Additionally, the CoIn-N-C presents excellent stability during the long-term operation, verifying the practicability of the CoIn-N-C catalyst. This work provides inspiring insights into the rational design of active catalysts for H 2 O 2 production and other catalytic systems.