A highly stable and active hybrid cathode for low-temperature solid oxide fuel cells

Liang, Fengli, Zhou, Wei and Zhu, Zhonghua (2014) A highly stable and active hybrid cathode for low-temperature solid oxide fuel cells. Chemelectrochem, 1 10: 1627-1631. doi:10.1002/celc.201402143


Author Liang, Fengli
Zhou, Wei
Zhu, Zhonghua
Title A highly stable and active hybrid cathode for low-temperature solid oxide fuel cells
Journal name Chemelectrochem   Check publisher's open access policy
ISSN 2196-0216
Publication date 2014-10
Year available 2014
Sub-type Article (original research)
DOI 10.1002/celc.201402143
Open Access Status
Volume 1
Issue 10
Start page 1627
End page 1631
Total pages 5
Place of publication Weinheim, Germany
Publisher Wiley
Collection year 2015
Language eng
Formatted abstract
Improving the sluggish oxygen reduction reaction (ORR) is vital to enable the commercialization of some high-temperature clean-energy devices. Silver (Ag) is usually decorated onto the surface of electrodes to enhance ORR activity. However, the thermal instability of Ag causes the deactivation of ORR on coarsened particles under operating conditions. Here, we introduce a SrSc0.175Nb0.025Co0.8O3−δ (SSNC) perovskite hybrid cathode decorated with Ag@CeO2 core–shell spheres, which shows an extremely high performance for the ORR. Its area-specific resistance is just 0.24 Ω cm2 at 500 °C, and it works stably under a cathodic polarization at 600 °C for over 110 h, without detectable performance deterioration. Electron microscopy reveals that the Ag cores remain isolated even after heating the catalyst to 800 °C. The design concept in this work can be extended to prevent the aggregation of other metallic electrocatalysts working at high temperatures.
Keyword Electrodes
Nanoparticles
Oxygen reduction reaction
Perovskites
Solid oxide fuel cells
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2015 Collection
 
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