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Sodium Cobalt Metaphosphate as an Efficient Oxygen Evolution Reaction Catalyst in Alkaline Solution

Gond, Ritambhara and Singh, Dheeraj Kumar and Eswaramoorthy, Muthusamy and Barpanda, Prabeer (2019) Sodium Cobalt Metaphosphate as an Efficient Oxygen Evolution Reaction Catalyst in Alkaline Solution. In: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 58 (25). pp. 8330-8335.

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Official URL: https://dx.doi.org/10.1002/anie.201901813

Abstract

Sodium cobalt metaphosphate NaCo(PO3)(3)] has CoO octahedra (CoO6) and shows superior oxygen evolution reaction (OER) activity in alkaline solution, comparable with the state-of-the-art precious-metal RuO2 catalyst. OER catalysts of this metaphosphate are prepared by combustion (Cb) and solid-state (SS) methods. The combustion-assisted method offers a facile synthesis and one-step carbon composite formation. Unusually high catalytic activity was observed in NCoM-Cb-Ar and could be due to chemical coupling effects between NaCo(PO3)(3) and partially graphitized carbon. This novel electrocatalyst exhibits very small overpotential of 340mV with high mass activity of 532Ag(-1). Good charge transfer abilities and chemical coupling between NaCo(PO3)(3) and amorphous carbon gives the OER activity in NCoM-Cb-Ar.

Item Type: Journal Article
Additional Information: copyright for this article belongs to WILEY-V C H VERLAG GMBH
Keywords: cobalt; combustion; electrocatalysis; metaphosphate; oxygen evolution reaction
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Depositing User: Id for Latest eprints
Date Deposited: 19 Aug 2019 09:59
Last Modified: 19 Aug 2019 09:59
URI: http://eprints.iisc.ac.in/id/eprint/63432

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