Construction of a highly efficient MoS-based composite electrocatalyst for the oxygen evolution reaction

Molybdenum disulfide (MoS 2 ) has great potential for the catalysis of the oxygen evolution reaction (OER) due to its suitable valence band edge. However, the high adsorption energy barriers of the key intermediates *OH and *OOH at the catalytic sites severely limit its catalytic activity. In this r...

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Published in:Catalysis science & technology 2024-10, Vol.14 (21), p.638-6392
Main Authors: Huang, Mengyan, Liu, Bo, Wu, Junwei, Gu, Junfeng, Zheng, Yichen, Ma, Peiyan, Li, Bei, Fu, Zhengyi
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Summary:Molybdenum disulfide (MoS 2 ) has great potential for the catalysis of the oxygen evolution reaction (OER) due to its suitable valence band edge. However, the high adsorption energy barriers of the key intermediates *OH and *OOH at the catalytic sites severely limit its catalytic activity. In this research, we designed a carboxyl-decorated MoC@MoS 2 composite (CC-MoC@MoS 2 ) electrocatalyst for OER, in which the S sites of MoS 2 provide effective adsorption of the two intermediates. The optimized CC-MoC@MoS 2 could catalyze OER rapidly and stably, reaching current densities of 10, 50 and 100 mA cm −2 in alkaline medium at overpotentials of 248, 307 and 359 mV, respectively. The carboxyl groups in CC-MoC@MoS 2 play a similar role to the amino acid residues in PS II.
ISSN:2044-4753
2044-4761
DOI:10.1039/d4cy00923a