Issue 32, 2021

Five novel MOFs with various dimensions as efficient catalysts for oxygen evolution reactions

Abstract

Five novel metal–organic frameworks (MOFs) with the formula [MII(dcpbpy)(sol)x]n (MII = CoII, sol = H2O, x = 1, 1; MII = NiII, sol = H2O, x = 1, 2; MII = MnII, sol = DMAc, x = 1, 3; MII = MnII, sol = DMF, x = 1, 4; MII = MnII, sol = H2O, x = 2, 5; dcpbpy = 4-(2,4-dicarboxylphenyl)-4,2′:6′,4′′-terpyridine) having various dimensions were prepared with different solvents and transition-metal ions (CoII, NiII and MnII). Single-crystal X-ray diffraction showed that 1–5 resulted in the grid layer stacked 3D (1 and 2), 2D (3 and 4) and 1D (5) frame structures due to their different coordination modes. Electrochemical analyses showed that 1–5 displayed efficient catalytic activity towards oxygen evolution reactions (OERs) under alkaline conditions. Besides, 1–2 with the stacked 3D framework could present a large interaction and result in a low overpotential of their OER behaviour, compared to the 2D (3 and 4) and 1D (5) frameworks. MOF 2 with a 3D frame structure and NiII as the active central ion gave the lowest required overpotential (130 mV) to generate a current density of 1 mA cm−2.

Graphical abstract: Five novel MOFs with various dimensions as efficient catalysts for oxygen evolution reactions

Supplementary files

Article information

Article type
Paper
Submitted
09 יונ 2021
Accepted
07 יול 2021
First published
07 יול 2021

CrystEngComm, 2021,23, 5475-5480

Five novel MOFs with various dimensions as efficient catalysts for oxygen evolution reactions

Z. Ren, L. Wang, J. Wang, B. Zhu, Q. Gao, M. Wang, F. Shao and Y. Fan, CrystEngComm, 2021, 23, 5475 DOI: 10.1039/D1CE00762A

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