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

Jiannan Du, Guokang Han (), Wei Zhang, Lingfeng Li, Yuqi Yan, Yaoxuan Shi, Xue Zhang, Lin Geng, Zhijiang Wang, Yueping Xiong, Geping Yin and Chunyu Du ()
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Jiannan Du: Harbin Institute of Technology
Guokang Han: Harbin Institute of Technology
Wei Zhang: Harbin Institute of Technology
Lingfeng Li: Harbin Institute of Technology
Yuqi Yan: Harbin Institute of Technology
Yaoxuan Shi: Harbin Institute of Technology
Xue Zhang: Chinese Academy of Sciences
Lin Geng: Harbin Institute of Technology
Zhijiang Wang: Harbin Institute of Technology
Yueping Xiong: Harbin Institute of Technology
Geping Yin: Harbin Institute of Technology
Chunyu Du: Harbin Institute of Technology

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract The two-electron oxygen reduction reaction in acid is highly attractive to produce H2O2, 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 H2O2 production in acid. The H2O2 partial current density reaches 1.92 mA cm−2 at 0.65 V in the rotating ring-disk electrode test, while the H2O2 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 H2O2 production and other catalytic systems.

Date: 2023
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DOI: 10.1038/s41467-023-40467-8

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