生物基MOFs衍生Co<sub>9</sub>S<sub>8</sub>/N,O-C电催化剂的析氧性能

doi:10.11896/cldb.22120095

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Abstract It is crucial to develop efficent oxygen evolution reaction (OER) catalysts for improving the performance of water-splitting devices. Metal-organic frameworks (MOFs)-derived metal-carbon (M-C) materials are widely used as OER catalysts due to their high specific surface area, easy adjustment of composition and structure. In this work, cobalt-gallic acid MOFs (Co-gallate) were assembled from gallic acid as the organic linkers. Via ligands exchange of thiocyanuric acid (TTCA), Co-gallate@TTCA was prepared. After carbonization of Co-gallate@TTCA, Co₉S₈/N, O-C electrocatalyst was obtained and the OER catalytic performance was evaluated. Compared with Co/O-C prepared by direct carbonization of Co-gallate, the overpotential of Co₉S₈/N, O-C material was only 270 mV with a Tafel slope of 71.5 mV·dec^-1 at a current density of 10 mA·cm^-2, and the OER performance was significantly improved. Moreover, the synthesized Co₉S₈/N, O-C material exhibits long-term catalytic stability. In this work, a readily available bio-based MOF was used as a sacrificial template, and N and S-containing ligands were introduced into the MOFs structure through ligand exchange. By changing the composition and structure of the carbonized products, the catalytic activity and kinetic performance of the catalysts are effectively improved.

Key words： gallic acid metal-organic frameworks Co₉S₈ oxygen evolution reaction water splitting

Published: 10 October 2024 Online: 2024-10-23

CLC number:

TQ426

Fund:National Natural Science Foundation of China (21803025).

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	Articles by authors
	CHAI Ruirui
	SANG Xinxin
	OU Shiguo
	LI Jiahao
	WANG Dawei

Cite this article:

CHAI Ruirui,SANG Xinxin,OU Shiguo, et al. Oxygen Evolution Performance of Bio-based MOFs Derived Co₉S₈/N, O-C Electrocatalysts[J]. Materials Reports, 2024, 38(19): 22120095-8.

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http://www.mater-rep.com/EN/10.11896/cldb.22120095 OR http://www.mater-rep.com/EN/Y2024/V38/I19/22120095

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