Evaluation of the CO2 poisoning effect on a highly active cathode SrSc0.175Nb0.025Co0.8O3-δ in the oxygen reduction reaction

Zhang, Yuan, Yang, Guangming, Chen, Gao, Ran, Ran, Zhou, Wei and Shao, Zongping (2016) Evaluation of the CO2 poisoning effect on a highly active cathode SrSc0.175Nb0.025Co0.8O3-δ in the oxygen reduction reaction. ACS Applied Materials and Interfaces, 8 5: 3003-3011. doi:10.1021/acsami.5b09780


Author Zhang, Yuan
Yang, Guangming
Chen, Gao
Ran, Ran
Zhou, Wei
Shao, Zongping
Title Evaluation of the CO2 poisoning effect on a highly active cathode SrSc0.175Nb0.025Co0.8O3-δ in the oxygen reduction reaction
Formatted title
Evaluation of the CO2 poisoning effect on a highly active cathode SrSc0.175Nb0.025Co0.8O3-δ in the oxygen reduction reaction
Journal name ACS Applied Materials and Interfaces   Check publisher's open access policy
ISSN 1944-8252
1944-8244
Publication date 2016-02-17
Sub-type Article (original research)
DOI 10.1021/acsami.5b09780
Open Access Status Not Open Access
Volume 8
Issue 5
Start page 3003
End page 3011
Total pages 9
Place of publication Washington DC, United States
Publisher American Chemical Society
Collection year 2017
Language eng
Formatted abstract
A solid oxide fuel cell (SOFC) is a highly efficient device for converting chemical energy to electrical energy. In addition to the efforts to reduce the operating temperature of SOFCs to below 600 °C, research studies of the basic mechanism of CO2 poisoning on cathode materials are envisioned to improve the operation of dual-chamber SOFCs using ambient air. In this work, we comparatively studied the CO2 poisoning effect on two highly active perovskites SrSc0.175Nb0.025Co0.8O3-δ (SSNC) and Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF), using complementary characterization techniques, e.g., powder X-ray diffraction (XRD), Fourier transform-infrared (FT-IR) spectroscopy, atomic force microscopy (AFM), scanning electron microscopy (SEM), CO2-temperature-programmed desorption (CO2-TPD), and electrochemical impedance spectroscopy (EIS). The SSNC cathode shows better tolerance to CO2 as compared with BSCF, which is attributed to the absence of Ba, higher average metal–oxygen bond energy (ABE) of SSNC, and the higher acidity of Nb5+ cations, whereas the oxygen vacancy concentration plays a less important role.
Keyword Carbonate
Cathode
CO2 poisoning
Perovskites
SOFC
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

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