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Optimized Trimetallic Benzotriazole-5-carboxylate MOFs with Coordinately Unsaturated Active site as Efficient Electrocatalyst for Oxygen Evolution Reaction

Abstract

Exploring efficient and stable oxygen evolution reaction (OER) catalysts with earth-abundant element has been an urgent task in water splitting. Metal-organic frameworks (MOFs), possessing abundant active metal sites and tunable porous crystalline structure, were promised to act as OER catalysts. In this paper, MOFs based on benzotriazole-5-carboxylate (Co3-btca) containing unsaturated coordinated metal centers and 1D channel was selected to act as OER catalyst. To optimize OER performance, isostructural bimetallic and trimetallic frameworks were obtained by doping Fe and/or Ni ions. The optimized Co2.36Fe0.19Ni2.45-btca possesses the lowest overpotential of 292 mV at 10 mA cm2 and a small Tafel slope of 72.6 mV dec-1. The enhanced catalytic performance could be contributed to the synergistic effect between unsaturated coordinated Co, Fe and Ni sites which benefit to nucleophilic attack of OH forming adsorption intermediates.

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Publication details

The article was received on 06 Nov 2019, accepted on 04 Dec 2019 and first published on 04 Dec 2019


Article type: Paper
DOI: 10.1039/C9DT04295D
Dalton Trans., 2019, Accepted Manuscript

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    Optimized Trimetallic Benzotriazole-5-carboxylate MOFs with Coordinately Unsaturated Active site as Efficient Electrocatalyst for Oxygen Evolution Reaction

    J. Yuan, J. Hou, X. Liu, Y. Feng and X. Zhang, Dalton Trans., 2019, Accepted Manuscript , DOI: 10.1039/C9DT04295D

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