Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/80898
Title: La 0.8 Sr 0.2 MnO 3 based perovskite with A-site deficiencies as high performance bifunctional electrocatalyst for oxygen reduction and evolution reaction in alkaline
Authors: Yuan, RH
He, Y
He, W 
Ni, M 
Leung, MKH
Keywords: A-site deficiency
La0.8Sr0.2MnO3
Oxygen evolution reaction
Oxygen reduction reaction
Perovskite
Issue Date: 2019
Publisher: Elsevier
Source: Energy procedia, 2019, v. 158, p. 5804-5810 How to cite?
Journal: Energy procedia 
Abstract: In this work, the A-site cation deficient perovskites (La 0.8 Sr 0.2 ) 1-x MnO 3 (x=0, 0.02, 0.05)(LSM) and Fe doped perovskite (La 0.8 Sr 0.2 ) 0.95 Mn 0.5 Fe 0.5 O 3 (LSMF) are prepared by sol-gel process assisted with chelating effect of citric acid. The structure, morphology and valence state of the prepared samples were characterized. Their catalytic activities toward oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) were investigated by rotating-disk electrode (RDE). As expected, appropriate introduce of A-site deficiency can enhance both ORR and OER activities. Among the A-site cation deficient perovskites studied, (La 0.8 Sr 0.2 ) 0.95 MnO 3 exhibited the highest ORR and OER activities and, hence, the best bifunctionality. After doping with Fe in the B-site, the (La 0.8 Sr 0.2 ) 0.95 Mn 0.5 Fe 0.5 O 3 perovskite exhibits even better electrochemical catalytic activity which is due to the increase of the concentration of oxygen vacancy as compared with (La 0.8 Sr 0.2 ) 0.95 MnO 3 . Furthermore, (La 0.8 Sr 0.2 ) 0.95 Mn 0.5 Fe 0.5 O 3 showed superior durability than commercial 20wt% Pt/C catalyst. This work indicates that introduce of A-site deficiency and B-site Fe doping in perovskite oxides is an effective strategy to enhance ORR and OER activity for the applications in metal-air batteries.
Description: 10th International Conference on Applied Energy, ICAE 2018, Hong Kong, 22-25 August 2018
URI: http://hdl.handle.net/10397/80898
EISSN: 1876-6102
DOI: 10.1016/j.egypro.2019.01.548
Rights: © 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)Peer-review under responsibility of the scientific committee of ICAE2018 – The 10th International Conference on Applied Energy.
The following publication Yuan, R. H., He, Y., He, W., Ni, M., & Leung, M. K. (2019). La0. 8Sr0. 2MnO3 based perovskite with A-site deficiencies as high performance bifunctional electrocatalyst for oxygen reduction and evolution reaction in alkaline. Energy Procedia, 158, 5804-5810 is available at https://doi.org/10.1016/j.egypro.2019.01.548
Appears in Collections:Conference Paper

Files in This Item:
File Description SizeFormat 
Yuan_La based_perovskite_with.pdf1.16 MBAdobe PDFView/Open
Access
View full-text via PolyU eLinks SFX Query
Show full item record
PIRA download icon_1.1View/Download Contents

Page view(s)

15
Citations as of Oct 15, 2019

Download(s)

10
Citations as of Oct 15, 2019

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.