Issue 18, 2023

Morphology control in the synthesis of [Mo3S13]2−/Co-MOF-74 composite catalysts and their application in the oxygen evolution reaction

Abstract

The novel composite electrocatalysts [Mo3S13]2−/Co-MOF-74 have been successfully prepared by using a simple solvothermal method. The morphology of composite catalysts can be effectively controlled by regulating the amount of [Mo3S13]2− because the addition of [Mo3S13]2 can affect the nucleation rate of Co-MOF-74. After the optimization, [Mo3S13]2−/Co-MOF-74 with spindle-like morphology displays remarkable OER electrocatalytic activity with a low overpotential (368 mV) to afford the current density of 10 mA cm−2 and a small Tafel slope of 90.6 mV dec−1, which is almost on a par with IrO2/C (358 mV, 89.1 mV dec−1). Besides, this composite catalyst can continuously work for about 17 h with almost negligible attenuation in current density. Such an excellent electrocatalytic OER performance of [Mo3S13]2−/Co-MOF-74 benefits from the good morphology obtained by the introduction of a moderate amount of [Mo3S13]2− as well as the synergistic effect between the [Mo3S13]2− and Co-MOF-74. This work provides new insight into the development of MOF-based electrocatalysts for the OER.

Graphical abstract: Morphology control in the synthesis of [Mo3S13]2−/Co-MOF-74 composite catalysts and their application in the oxygen evolution reaction

Supplementary files

Article information

Article type
Paper
Submitted
24 Feb 2023
Accepted
30 Mar 2023
First published
31 Mar 2023

New J. Chem., 2023,47, 8507-8514

Morphology control in the synthesis of [Mo3S13]2−/Co-MOF-74 composite catalysts and their application in the oxygen evolution reaction

J. Gu, J. He, H. Zheng and C. Sun, New J. Chem., 2023, 47, 8507 DOI: 10.1039/D3NJ00887H

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