High-entropy alloys for water oxidation: A new class of electrocatalysts to look out for

Nandan, R and Rekha, MY and Devi, HR and Srivastava, C and Nanda, KK (2021) High-entropy alloys for water oxidation: A new class of electrocatalysts to look out for. In: Chemical Communications, 57 (5). pp. 611-614.

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Abstract

High-entropy alloys (HEAs) with five or more elements can provide near-continuous adsorption energies and can be optimized for superior persistent catalytic activity. This report presents electrochemical water oxidation facilitated by employing graphene and FeCoNiCuCr HEA nanoparticle based composites prepared via the mechanical milling of graphite-metal powders. The composite efficiently facilitates water oxidation with a low overpotential of 330 mV at 10 mA cm-2, and high specific and mass activities (�143 mA cm-2 and 380 mA mg-1, respectively, at 1.75 V). Importantly, the composites exhibit excellent accelerated cycling stability with �99 current retention (after 3250 cycles). The HEA-based composites are anticipated to replace noble/precious metal based traditional electrocatalysts in the future, the use of which is a major obstacle in the technological scalability of electrochemical energy conversion and storage devices. This journal is © The Royal Society of Chemistry.

Item Type:	Journal Article
Publication:	Chemical Communications
Publisher:	Royal Society of Chemistry
Additional Information:	The copyright of this article belongs to Royal Society of Chemistry
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	24 Feb 2021 07:26
Last Modified:	24 Feb 2021 07:26
URI:	http://eprints.iisc.ac.in/id/eprint/67935

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