S、Mo共改性钴基复合材料的制备及析氧反应研究

doi:10.11896/cldb.25040131

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Abstract Metal-organic frameworks (MOFs) are a promising class of catalysts due to their abundant metal sites, large specific surface area and tunable porous structure. However, the low electronic conductivity of most MOFs limits their application in electrocatalysis. In thiswork, a two-step synthesis method was used to construct Co-MOF composite catalysts. The sulfided cobalt metal-organic framework precursor was first prepared using a solvothermal method, followed by the introduction of Mo elements for structural modification using a hydrothermal reaction. The optimized Mo/S-Co-MOF catalyst exhibited the best OER catalytic performance, with an overpotential of 255 mV and a Tafel slope of 89 mV·dec^-1 at a current density of 10 mA·cm^-2, and maintained 89% catalytic activity after 40 h of continuous electrolysis. Superior to the electrocatalysts reported in the literature (CoMo LDH/CNTs), the overpotential was reduced by 11 mV. Moreover, the charge transfer resistance (R_ct) was reduced by 3.04 Ω compared with that of the conventional Co-MOF catalysts, which proved that the S, Mo modification could modulate the electronic structure of Co and reduce the charge transfer resistance, thus accelerating the electron transport. Meanwhile, the strong interaction of CoMo bimetallic can effectively inhibit the electrolyte corrosion and enhance the oxygen precipitation activity and durability to some extent. This study provides a new idea for designing low-cost transition metal-based catalysts for electrolytic water.

Key words： electrocatalysis oxygen evolution reaction (OER) transition metal heteroatom doping metal-organic framework (MOF)

Published: 25 April 2026 Online: 2026-05-06

CLC number:

TQ116

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	Articles by authors
	GU Xiao
	WANG Yijie
	QIN Lina
	PENG Xuan
	DU Maozhan
	SUN Lixian
	XU Fen

Cite this article:

GU Xiao,WANG Yijie,QIN Lina, et al. Study on Preparation and Oxygen Evolution Reaction Performance of S,Mo Co-modified Cobalt-based Composites[J]. Materials Reports, 2026, 40(8): 25040131-6.

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https://www.mater-rep.com/EN/10.11896/cldb.25040131 OR https://www.mater-rep.com/EN/Y2026/V40/I8/25040131

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