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

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)....

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Main Authors:	Yuling Xia, Kaili Guo, Bobing Hu, Ranran Peng, Changrong Xia
Format:	Article
Language:	English
Published:	Elsevier 2021-05-01
Series:	Electrochemistry Communications
Subjects:	Gold particle Lanthanum strontium cobaltite ferrite Solid oxide fuel cell Oxygen reduction reaction Chemical oxygen surface exchange coefficient
Online Access:	http://www.sciencedirect.com/science/article/pii/S1388248121001119

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spelling	doaj-cc0fe906ade74003bb3ec2110690ded62021-05-04T07:23:16ZengElsevierElectrochemistry Communications1388-24812021-05-01126107027Gold particle effect on high temperature oxygen reduction reaction via lanthanum strontium cobaltite ferrite electrocatalystYuling Xia0Kaili Guo1Bobing Hu2Ranran Peng3Changrong Xia4CAS 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 ChinaCAS 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 ChinaCAS 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 ChinaCAS 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).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).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.http://www.sciencedirect.com/science/article/pii/S1388248121001119Gold particleLanthanum strontium cobaltite ferriteSolid oxide fuel cellOxygen reduction reactionChemical oxygen surface exchange coefficient
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Yuling Xia Kaili Guo Bobing Hu Ranran Peng Changrong Xia
spellingShingle	Yuling Xia Kaili Guo Bobing Hu Ranran Peng Changrong Xia Gold particle effect on high temperature oxygen reduction reaction via lanthanum strontium cobaltite ferrite electrocatalyst Electrochemistry Communications Gold particle Lanthanum strontium cobaltite ferrite Solid oxide fuel cell Oxygen reduction reaction Chemical oxygen surface exchange coefficient
author_facet	Yuling Xia Kaili Guo Bobing Hu Ranran Peng Changrong Xia
author_sort	Yuling Xia
title	Gold particle effect on high temperature oxygen reduction reaction via lanthanum strontium cobaltite ferrite electrocatalyst
title_short	Gold particle effect on high temperature oxygen reduction reaction via lanthanum strontium cobaltite ferrite electrocatalyst
title_full	Gold particle effect on high temperature oxygen reduction reaction via lanthanum strontium cobaltite ferrite electrocatalyst
title_fullStr	Gold particle effect on high temperature oxygen reduction reaction via lanthanum strontium cobaltite ferrite electrocatalyst
title_full_unstemmed	Gold particle effect on high temperature oxygen reduction reaction via lanthanum strontium cobaltite ferrite electrocatalyst
title_sort	gold particle effect on high temperature oxygen reduction reaction via lanthanum strontium cobaltite ferrite electrocatalyst
publisher	Elsevier
series	Electrochemistry Communications
issn	1388-2481
publishDate	2021-05-01
description	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.
topic	Gold particle Lanthanum strontium cobaltite ferrite Solid oxide fuel cell Oxygen reduction reaction Chemical oxygen surface exchange coefficient
url	http://www.sciencedirect.com/science/article/pii/S1388248121001119
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Gold particle effect on high temperature oxygen reduction reaction via lanthanum strontium cobaltite ferrite electrocatalyst

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