In Situ Exsolved Nanoparticles on La0.5Sr1.5Fe1.5Mo0.5O6-δ Anode Enhance the Hydrogen Oxidation Reaction in SOFCs

H. Qi; F. Xia; T. Yang; W. Li; L. Ma; G. Collins; W. Shi; H. Tian; S. Hu; T. Thomas; E.M. Sabolsky; J. Zondlo; R. Hart; H. Finklea; G.A. Hackett; X. Liu

doi:10.1149/1945-7111/ab6a82

Back

In Situ Exsolved Nanoparticles on La0.5Sr1.5Fe1.5Mo0.5O6-δ Anode Enhance the Hydrogen Oxidation Reaction in SOFCs

Journal article

Peer reviewed

In Situ Exsolved Nanoparticles on La0.5Sr1.5Fe1.5Mo0.5O6-δ Anode Enhance the Hydrogen Oxidation Reaction in SOFCs

H. Qi, F. Xia, T. Yang, W. Li, W. Li, L. Ma, G. Collins, W. Shi, H. Tian, S. Hu, …

Journal of The Electrochemical Society, Vol.167(2), Art. 024510

2020

DOI: https://doi.org/10.1149/1945-7111/ab6a82

Files and links (1)

url

Link to Published Version *Subscription may be requiredView

Abstract

uIn situ exsolution of nanoparticles is widely considered as an efficient and cost-effective method for increasing the number of active sites and consequently the catalytic activity on ceramic anodes in solid oxide fuel cells (SOFCs). In this study, by doping on the A-site of Sr2Fe1.5Mo0.5O6-delta (SF1.5 M), evenly distributed Fe nanoparticles (similar to 100 nm) were exsolved on the La0.5Sr1.5Fe1.5Mo0.5O6- delta (LSFM) surface under a typical anode operating environment (humidified H-2, 800 degrees C). In addition, the exsolution-dissolution reversibility of the exsolved Fe nanoparticles was observed during a redox cycle. Electrical conductivity relaxation (ECR) analysis demonstrated that the surface reaction kinetics on the LSFM anode is enhanced by in situ exsolution. Based on electrochemical impedance spectroscopy (EIS) and distribution of relaxation time (DRT) analysis, the perovskite structure was not damaged by the exsolution or the surface phase transition. During exsolution, the ionic conductivity increased. The higher surface catalytic activity and faster oxygen transportation led to enhanced electrochemical performance.

Details

Title: In Situ Exsolved Nanoparticles on La0.5Sr1.5Fe1.5Mo0.5O6-δ Anode Enhance the Hydrogen Oxidation Reaction in SOFCs
Authors/Creators: H. Qi (Author/Creator) - West Virginia University
F. Xia (Author/Creator) - Murdoch University
T. Yang (Author/Creator) - National Energy Technology Laboratory
W. Li (Author/Creator) - West Virginia University
W. Li (Author/Creator) - West Virginia University
L. Ma (Author/Creator) - West Virginia University
G. Collins (Author/Creator) - West Virginia University
W. Shi (Author/Creator) - Tsinghua University
H. Tian (Author/Creator) - West Virginia University
S. Hu (Author/Creator) - West Virginia University
T. Thomas (Author/Creator) - West Virginia University
E.M. Sabolsky (Author/Creator) - West Virginia University
J. Zondlo (Author/Creator) - University of West Virginia
R. Hart (Author/Creator) - GE Global Research (United States)
H. Finklea (Author/Creator) - University of West Virginia
G.A. Hackett (Author/Creator) - National Energy Technology Laboratory
X. Liu (Author/Creator) - West Virginia University
Publication Details: Journal of The Electrochemical Society, Vol.167(2), Art. 024510
Publisher: Electrochemical Society
Identifiers: 991005541972707891
Copyright: © 2020 The Electrochemical Society
Murdoch Affiliation: Chemistry and Physics
Language: English
Resource Type: Journal article

UN Sustainable Development Goals (SDGs)

This output has contributed to the advancement of the following goals:

Source: InCites

Metrics

15 Record Views

18 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Collaboration types: Industry collaboration; Domestic collaboration; International collaboration
Citation topics: 5 Physics; 5.77 Applied Physics; 5.77.285 Solid Oxide Fuel Cell
Web Of Science research areas: Electrochemistry; Materials Science, Coatings & Films
ESI research areas: Chemistry