Issue 10, 2021

Electrocatalytic hydrogen peroxide production in acidic media enabled by NiS2 nanosheets

Abstract

The selective two-electron O2 reduction reaction (2e ORR) represents a green, mild, and on-site means of synthesizing H2O2. However, its practical feasibility depends on the development of advanced electrocatalysts, and limited experimental work has been done on non-precious-metal-based materials for the H2O2 electrogeneration in acids. Our study here introduces NiS2 nanosheets for the first time as an efficient electrocatalyst for the 2e ORR under acidic conditions. In 0.05 M H2SO4, the NiS2 catalyst shows an onset overpotential of ∼130 mV and offers high selectivity (H2O2 percentage up to 99%). Moreover, the NiS2 catalyst attains the largest faradaic efficiency of 98% and the highest H2O2 yield rate of 109 ppm h−1 at 0.456 V and 0.156 V in the H-cell testing, respectively. The catalytic mechanism is revealed by theoretical calculations.

Graphical abstract: Electrocatalytic hydrogen peroxide production in acidic media enabled by NiS2 nanosheets

Supplementary files

Article information

Article type
Communication
Submitted
10 Tsh 2020
Accepted
15 Kol 2021
First published
18 Kol 2021

J. Mater. Chem. A, 2021,9, 6117-6122

Electrocatalytic hydrogen peroxide production in acidic media enabled by NiS2 nanosheets

J. Liang, Y. Wang, Q. Liu, Y. Luo, T. Li, H. Zhao, S. Lu, F. Zhang, A. M. Asiri, F. Liu, D. Ma and X. Sun, J. Mater. Chem. A, 2021, 9, 6117 DOI: 10.1039/D0TA12008A

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