Self‐modification of Ni Metal Surfaces with CeO2 to Suppress Carbon Deposition at Solid Oxide Fuel Cell Anodes

High durability against carbon deposition on Ni anodes of internal‐reforming solid oxide fuel cells (SOFCs) is one of the most significant challenges in the utilization of SOFCs. Carbon deposition is strongly affected by the type of solid oxide electrolyte, although it occurs on Ni surfaces which ar...

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Published inFuel cells (Weinheim an der Bergstrasse, Germany) Vol. 17; no. 3; pp. 402 - 406
Main Authors Kubota, J., Hashimoto, S., Shindo, T., Yashiro, K., Matsui, T., Yamaji, K., Kishimoto, H., Kawada, T.
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 01.06.2017
Subjects
Anodes
Auger spectroscopy
Carbon
Carbon Deposition
Catalysis
Cell anodes
Deposition
Durability
Electrolytes
Electrolytic cells
Fuel Cells
Gd‐doped Ceria (GDC)
Infrared radiation
Infrared spectra
Infrared spectroscopy
Metal Support Interaction
Metal surfaces
Nanostructure
Ni Anode
Nickel
Reforming
Solid oxide fuel cells
Solid Oxide Fuel Cells (SOFC)
Spectrum analysis
Yttrium oxide
Zirconium dioxide
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Summary:High durability against carbon deposition on Ni anodes of internal‐reforming solid oxide fuel cells (SOFCs) is one of the most significant challenges in the utilization of SOFCs. Carbon deposition is strongly affected by the type of solid oxide electrolyte, although it occurs on Ni surfaces which are a few hundred nanometers away from the solid oxide electrolyte. Carbon deposition under CH4 flow at 1,073 K on Ni particles on yttria‐stabilized ZrO2 was determined to occur more readily than on Ni particles on Gd‐doped CeO2. We have examined how the solid oxides interact with the Ni surfaces in anodes using Auger electron microanalysis and infrared spectroscopy with adsorbed molecules. The results suggest that the CeO2 species migrate on the Ni surfaces under reducing conditions. The chemical influence of CeO2 migration on the Ni surface was confirmed by infrared spectra of adsorbed CO on Ni sites.
ISSN:1615-6846
1615-6854
DOI:10.1002/fuce.201600180