Proton-conducting la-doped ceria-based internal reforming layer for direct methane solid oxide fuel cells

Zhao, Jie, Xu, Xiaoyong, Zhou, Wei, Blakey, Idriss, Liu, Shaomin and Zhu, Zhonghua (2017) Proton-conducting la-doped ceria-based internal reforming layer for direct methane solid oxide fuel cells. ACS Applied Materials and Interfaces, 9 39: 33758-33765. doi:10.1021/acsami.7b07938


Author Zhao, Jie
Xu, Xiaoyong
Zhou, Wei
Blakey, Idriss
Liu, Shaomin
Zhu, Zhonghua
Title Proton-conducting la-doped ceria-based internal reforming layer for direct methane solid oxide fuel cells
Journal name ACS Applied Materials and Interfaces   Check publisher's open access policy
ISSN 1944-8244
1944-8252
Publication date 2017-09-11
Year available 2017
Sub-type Article (original research)
DOI 10.1021/acsami.7b07938
Open Access Status Not yet assessed
Volume 9
Issue 39
Start page 33758
End page 33765
Total pages 8
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract Performance degradation caused by carbon deposition substantially restricts the development of direct methane solid oxide fuel cells (SOFCs). Here, an internal reforming layer composed of Ni supported on proton conducting La-doped ceria, such as La2Ce2O7 (LDC) and La-1.95 Sm0.05Ce2O7 (LSDC) is applied over conventional Ni-Ce(0.8)Sm(0.2)Q(2-x) (SDC) anodes for direct methane SOFCs. The proton conducting layer can adsorb water for internal reforming thus significantly improving the performance of the direct methane SOFCs. In situ Raman and FTIR results confirm the water adsorption capacity of LDC and LSDC. They also exhibit excellent phase stability in wet CO2 at 650 oC for 10 h, which ensures that the additional catalyst layer maintains structure stability during the internal reforming. In wet methane at 650 oC, the peak power density of the conventional cell is only 580 +/- 20 mW cm(-2) , and increases to 699 +/- 20 and 639 +/- 20 mW cm(-2) with the addition of Ni-LDC and-LSDC layers, respectively. For the stability test in wet methane at 650 oC and 0.2 A cm(-2) , the voltage of the conventional cell starts to drop dramatically in 10 h, while the Ni-LDC and-LSDC catalyst layers operate stably in 26 h under the identical conditions. These catalyst layers even show comparable stability in dry and wet methane in 26 h, but for longer operation, the wet methane is still preferred for maintaining the stability of the cell.
Keyword Hydrogen Permeation
Chemical-Stability
Electronic Conductor
Raman-Spectroscopy
Functional Layer
Direct Oxidation
Anode Material
Ion Conductor
Ni-Ysz
Membranes
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID DP160104973
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
HERDC Pre-Audit
Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Sun, 05 Nov 2017, 09:15:07 EST