Issue 3, 2023

Thiacalixarene-based {Co/Fe}16 coordination clusters: bimetallic synergistic effect for an enhanced oxygen evolution reaction

Abstract

The integration of heterometallic units into coordination clusters used for the oxygen evolution reaction (OER) can enhance their electrocatalytic performance. Herein, we report the syntheses of a series of coordination clusters, namely Co16, {CoFe}16-a, {CoFe}16-b, {CoFe}16-c and Fe16, assembled from different metal precursors (CoCl2·6H2O and/or FeCl3·6H2O), p-tert-butylsulfonylcalix[4]arene (H4TC4A-SO2), and 1,3-bis(2H-tetrazol-5-yl)benzene (BTTAB). These clusters feature box-like entities in which four M4-(TC4A-SO2) polynuclear secondary building units (PSBUs) in a square arrangement are bridged by eight BTTAB ligands. Among these PSBU-based coordination clusters, {CoFe}16-b exhibits a better OER activity with an overpotential of 285.3 mV at a current density of 10 mA cm−2 and a Tafel slope of 72.8 mV dec−1 due to the synergistic effect between Co and Fe with an optimized molar ratio.

Graphical abstract: Thiacalixarene-based {Co/Fe}16 coordination clusters: bimetallic synergistic effect for an enhanced oxygen evolution reaction

Supplementary files

Article information

Article type
Research Article
Submitted
31 Aug. 2022
Accepted
01 Dec. 2022
First published
02 Dec. 2022

Inorg. Chem. Front., 2023,10, 926-933

Thiacalixarene-based {Co/Fe}16 coordination clusters: bimetallic synergistic effect for an enhanced oxygen evolution reaction

X. Hang, X. Wang, M. Wang, M. Chen and Y. Bi, Inorg. Chem. Front., 2023, 10, 926 DOI: 10.1039/D2QI01885C

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