Issue 70, 2024

Indium oxide with oxygen vacancies boosts O2 adsorption and activation for electrocatalytic H2O2 production

Abstract

Oxygen reduction reaction via the two-electron pathway (2e ORR) offers a sustainable opportunity for hydrogen peroxide (H2O2) production, but suffers from low selectivity. In this work, indium oxide with oxygen vacancies (In2O3−x) exhibits a H2O2 selectivity close to 98% at 0.6 V vs. RHE. Further, a Faradaic efficiency (FE) of around 95% at 0.4–0.6 V vs. RHE and a H2O2 productivity of 3.7 mol gcatalyst−1 h−1 are reached in a flow cell. In situ Raman spectra indicate that In2O3−x promotes the adsorption and activation of O2 and stabilizes oxygen intermediates. This work provides an insight into improving H2O2 selectivity for 2e ORR catalysts.

Graphical abstract: Indium oxide with oxygen vacancies boosts O2 adsorption and activation for electrocatalytic H2O2 production

Supplementary files

Article information

Article type
Communication
Submitted
05 Goue. 2024
Accepted
30 Goue. 2024
First published
31 Goue. 2024

Chem. Commun., 2024,60, 9364-9367

Indium oxide with oxygen vacancies boosts O2 adsorption and activation for electrocatalytic H2O2 production

D. Deng, Y. Wang, J. Jiang, Y. Bai, Y. Chen, H. Zheng, H. Ou and Y. Lei, Chem. Commun., 2024, 60, 9364 DOI: 10.1039/D4CC03361B

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