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Inorg Chem ; 62(16): 6411-6420, 2023 Apr 24.
Article in English | MEDLINE | ID: mdl-37036319

ABSTRACT

Developing cost-efficient and noble metal free electrocatalysts is vastly anticipated for the oxygen evolution reaction (OER). Therefore, in this study, to lift the thermodynamic and kinetic activity of the OER, we attempted to synthesize a bimetallic nickel and manganese-based zeolite imidazolate framework system in a fiber form. For this synthesis, a bottom-up approach has been followed through wet chemical analysis, and electrospinning was utilized for fiber formation. The resultant fiber has shown a lesser overpotential of 256 mV at a benchmarking current density of 10 mA cm-2 under 1 M KOH conditions. As expected, the attained Tafel slope and charge transfer resistance values are lesser. The observed results reveal that the synergism between the Ni and Mn nodes on the imidazolate framework successfully promotes the thermodynamic formation of *O and *OOH intermediates, which significantly helps to improve the faster OER kinetics at the electrode-electrolyte interface.

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