Gold particle effect on high temperature oxygen reduction reaction via lanthanum strontium cobaltite ferrite electrocatalyst

Yuling Xia; Kaili Guo; Bobing Hu; Ranran Peng; Changrong Xia

Electrochemistry Communications (May 2021)

Gold particle effect on high temperature oxygen reduction reaction via lanthanum strontium cobaltite ferrite electrocatalyst

Yuling Xia,
Kaili Guo,
Bobing Hu,
Ranran Peng,
Changrong Xia

Affiliations

Yuling Xia: CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui Province 230026, PR China; Energy Material Center, Anhui Estone Materials Technology Co. Ltd, 2-A-1, No. 106, Chuangxin Avenue, Hefei, Anhui Province 230088, PR China; Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, Jiangsu Province 215123, PR China
Kaili Guo: CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui Province 230026, PR China
Bobing Hu: CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui Province 230026, PR China
Ranran Peng: CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui Province 230026, PR China; Corresponding authors at: CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui Province 230026, PR China (C. Xia).
Changrong Xia: CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui Province 230026, PR China; Energy Material Center, Anhui Estone Materials Technology Co. Ltd, 2-A-1, No. 106, Chuangxin Avenue, Hefei, Anhui Province 230088, PR China; Corresponding authors at: CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui Province 230026, PR China (C. Xia).

Journal volume & issue: Vol. 126
p. 107027

Abstract

Read online

Gold is generally considered to be inert for electrochemical reactions in solid oxide fuel cells (SOFCs). It is thus used as the standard current collector to characterize the catalytic activity of various cathode materials including the state-of-the-art lanthanum strontium cobalt iron oxide (LSCF). This work shows that gold is not inert but active for oxygen reduction reaction (ORR) via LSCF. Electrical conductivity relaxation measurement shows that scattered gold particles on LSCF surface can greatly increase the ORR rate. Gold improves the chemical oxygen surface exchange coefficient by a factor up to 27.5. The improvement is much high at reduced temperature from 800 to 650 °C. In addition, gold particles with smaller size show better performance in enhancing the ORR activity.

Published in Electrochemistry Communications

ISSN: 1388-2481 (Print); 1873-1902 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Technology: Chemical technology: Industrial electrochemistry; Science: Chemistry
Website: https://www.journals.elsevier.com/electrochemistry-communications

About the journal

Abstract

Keywords