Fabrication of Ba0.5Sr0.5Co0.8Fe0.2O(3-δ) catalysts with enhanced electrochemical performance by removing an inherent heterogeneous surface film layer

Jae-Il Jung; Hu Young Jeong; Min Gyu Kim; Gyutae Nam; Joohyuk Park; Jaephil Cho

doi:10.1002/adma.201403897

Fabrication of Ba0.5Sr0.5Co0.8Fe0.2O(3-δ) catalysts with enhanced electrochemical performance by removing an inherent heterogeneous surface film layer

Adv Mater. 2015 Jan 14;27(2):266-71. doi: 10.1002/adma.201403897. Epub 2014 Nov 20.

Authors

Jae-Il Jung¹, Hu Young Jeong, Min Gyu Kim, Gyutae Nam, Joohyuk Park, Jaephil Cho

Affiliation

¹ School of Energy and Chemical Engineering, Ulsan National Institute of Science & Technology (UNIST), Ulsan, 689-798, South Korea.

PMID: 25413252
DOI: 10.1002/adma.201403897

Abstract

A heat-treatment approach for Ba0.5Sr0.5Co0.8Fe0.2O(3-δ) (BSCF5582) is introduced as a way of enhancing the electrocatalytic performance of perovskite catalysts. The perovskite made by heat-treatment in oxygen atmosphere loses around 30 nm of spinel layer on the surface relative to the untreated version, and demonstrates enhanced oxygen reduction reaction and oxygen evolution reaction catalytic activities.

Keywords: oxygen evolution reaction; oxygen reduction reaction; perovskite electrocatalyst; surface chemistry and structure.