Silver-perovskite hybrid electrocatalysts for oxygen reduction reaction in alkaline media

Wang, Xixi and Ge, Lei and Zhu, Yinlong and Dai, Jie and Zhou, Wei and Shao, Zongping (2018) Silver-perovskite hybrid electrocatalysts for oxygen reduction reaction in alkaline media. Journal of the Electrochemical Society, 165 (9). H524-H529. ISSN 0013-4651

Abstract

Developing a low-cost, and highly-efficient catalysts for improving oxygen reduction reaction (ORR) is imperative to the energy storage and conversion device. Here, we synthesized Ag/La0.6Sr0.4CoO3-delta, (Ag/LSC) composites by decorating LSC with Ag using the electroless technique. As a result, the LSC was homogenously overlaid with Ag nanoparticles. The derived Ag/LSC composites possessed a relatively higher specific surface area than pure LSC and Ag. The Co-O-Ag bonds in the composites contribute substantial electrons transferred from Ag to Co element, resulting in the unique electronic structures and strong electronic interaction between Ag and LSC. The significant improvements of ORR activity in alkaline solution at room temperature can be observed in Ag/LSC composites compared to the pure Ag and LSC. The composites with optimal Ag loading (50 wt%) showed best ORR activity among all the composites according to the half-wave potential and diffusion limiting current density. The presented strategy of silver surface modification via electroless process can provide effective routes for designing high performance metal oxide (e.g. perovskite) composite electrocatalysts. (C) 2018 The Electrochemical Society.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials
Date Deposited: 29 Jan 2019 03:14
Last Modified: 05 Feb 2019 01:38
Uncontrolled Keywords: carbon nanotube arrays; lithium-air batteries; evolution reactions; fuel-cells; bifunctional catalysts; oxide catalysts; glassy-carbon; nanoparticles; graphene; performance
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030301 Chemical Characterisation of Materials
09 Engineering > 0912 Materials Engineering > 091201 Ceramics
09 Engineering > 0904 Chemical Engineering > 090402 Catalytic Process Engineering
Socio-Economic Objective: B Economic Development > 85 Energy > 8506 Energy Storage, Distribution and Supply > 850601 Energy Services and Utilities
E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1149/2.1131809jes
URI: http://eprints.usq.edu.au/id/eprint/34820

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