Oxygen deficient layered double perovskite as an active cathode for CO2 electrolysis using a solid oxide conductor
View/ Open
Date
2015Grant ID
EP/I022570/1
EP/I038950/1
EP/K015540/1
EP/I022570/1
Metadata
Show full item recordAbstract
A-site ordered PrBaMn2O5+δ was investigated as a potential cathode for CO2 electrolysis using a La0.9Sr0.1Ga0.8Mg0.2O3 (LSGM) electrolyte. The A-site ordered layered double perovskite, PrBaMn2O5+δ, was found to enhance electrocatalytic activity for CO2 reduction on the cathode side since it supports mixed valent transition metal cations such as Mn, which could provide high electrical conductivity and maintain a large oxygen vacancy content, contributing to fast oxygen ion diffusion. It was found that during the oxidation of the reduced PrBaMn2O5+δ (O5 phase) to PrBaMn2O6−δ (O6 phase), a reversible oxygen switchover in the lattice takes place. In addition, here the successful CO2 electrolysis was measured in LSGM electrolyte with this novel oxide electrode. It was found that this PrBaMn2O5+δ, layered perovskite cathode exhibits a performance with a current density of 0.85 A cm−2 at 1.5 V and 850 °C and the electrochemical properties were also evaluated by impedance spectroscopy.
Citation
Shin , T H , Myung , J-H , Verbraeken , M C , Kim , G & Irvine , J T S 2015 , ' Oxygen deficient layered double perovskite as an active cathode for CO 2 electrolysis using a solid oxide conductor ' , Faraday Discussions , vol. In press . https://doi.org/10.1039/C5FD00025D
Publication
Faraday Discussions
Status
Peer reviewed
ISSN
1359-6640Type
Journal article
Rights
Copyright 2015 the Authors. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (http://creativecommons.org/licenses/by/3.0/).
Description
The authors thank EPSRC (EP/I022570/1, EP/K015540/1, EP/I038950/1) and the Royal Society (Wolfson Research Merit award) for support.Collections
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.