A Rare Polyoxometalate Cluster [NiWO] Based Solid As a Pre-catalyst for Efficient and Long-term Oxygen Evolution

Overview

Journal Nanoscale Adv

Publisher Royal Society of Chemistry

Specialty Biotechnology

Date 2022 Dec 12

PMID 36504740

Authors

Parul Sood

Arti Joshi

Monika Singh

Affiliations

Soon will be listed here.

Abstract

Polyoxometalates (POMs) are an eminent class of metal oxide anionic clusters of early transition metals with huge structural diversity. Herein, a [NiWO] cluster based solid, (CHN)[NiWO], has been reported (PS-78). The [NiWO] cluster bridges the missing gap of 1 : 12 hetero-POMs of Keggin and Silverton together with a coordination number of 8 of the central heteroatom (Ni). Furthermore PS-78 has been explored as an efficient and highly sustained oxygen evolution pre-catalyst in alkaline medium with an overpotential of 347 mV to attain a current density of 10 mA cm and long-term stability up to 96 hours. Furthermore, mechanistic investigation showed that generated NiO and WO ( = 1, 2) species act as active species for the oxygen evolution reaction. This study will open up new avenues for exploring POMs' new topologies and the potential of POMs as effective pre-catalysts in electrocatalytic applications.

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PMID: 37941962 PMC: 10628982. DOI: 10.1039/d3na00459g.

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