Issue 24, 2024

Room temperature and rapid synthesis of two-dimensional bimetallic NiCo-CAT MOFs by an electrochemical strategy for enhancing electrocatalytic oxygen evolution reaction

Abstract

Room temperature, rapid and large-scale preparation of 2D-metal organic frameworks (2D-MOFs) with high oxygen evolution reaction (OER) activity is still a challenge. Herein, a series of 2D NiCo-CAT MOFs were synthesized by a mild green electrochemical method with Ni and Co as metal sources and 2,3,6,7,10,11-hexahydroxytribenzene (HHTP) as the organic ligand. The synthesis conditions were fine-tuned by adjusting the solvent ratio, applied voltage, synthesis temperature, and reaction time. Electrochemical testing revealed that NiCo-CAT/CC exhibited a low overpotential of 307 mV at a current density of 10 mA cm−2, accompanied by a small Tafel slope of 61.03 mV dec−1 in a 1.0 M KOH solution (the dosage of Co2+ was 70 μmol). Further investigation shows that the rapid electron transfer, large electrochemical active area and exposure of more metal active sites in bimetallic NiCo-CAT enhanced the OER activity. This work has opened up a new pathway for the rapid preparation of OER catalysts using the electrochemical strategy, offering a green approach with short reaction times, low energy consumption, and high yields, making it ideal for future practical applications.

Graphical abstract: Room temperature and rapid synthesis of two-dimensional bimetallic NiCo-CAT MOFs by an electrochemical strategy for enhancing electrocatalytic oxygen evolution reaction

Supplementary files

Article information

Article type
Paper
Submitted
17 Apr 2024
Accepted
16 May 2024
First published
16 May 2024

CrystEngComm, 2024,26, 3185-3193

Room temperature and rapid synthesis of two-dimensional bimetallic NiCo-CAT MOFs by an electrochemical strategy for enhancing electrocatalytic oxygen evolution reaction

W. Yan, Y. Xue, M. Liu, X. Qiao, C. Jing, Y. Yu, X. Yan, J. Wei, H. Dong and F. Zhang, CrystEngComm, 2024, 26, 3185 DOI: 10.1039/D4CE00383G

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