NDLI: A chromium oxide coated nickel/yttria stabilized zirconia electrode with a heterojunction interface for use in electrochemical methane reforming

Content Provider	Royal Society of Chemistry (RSC)
Author	Chen, Shigang Qi, Wentao Wu, Yucheng Xie, Kui
Copyright Year	2015
Abstract	This work investigated the use of nickel/yttria stabilized zirconia (Ni/YSZ) coated in situ with chromium oxide (Cr2O3) for electrochemical methane (CH4) reforming in solid oxide electrolysers. Combined analysis using X-ray diffraction spectroscopy, transmission electron microscopy, scanning electron microscopy and X-ray photoelectron spectroscopy confirmed the formation of Cr2O3 on the Ni surface with a heterojunction interface formed by reducing nickel chromite (NiCr2O4) to a core–shell structure. The electrical properties of the Cr2O3 coated Ni/YSZ were investigated and correlated to the electrochemical performance. Significant improvements of electrode activity were achieved with Cr2O3 coated Ni/YSZ in contrast to traditional Ni/YSZ in a CH4 atmosphere. Strong carbon deposition resistance was also observed in a methane–carbon dioxide (CH4–CO2; 1 : 1) atmosphere at 800 °C. Significant enhancement in electrochemical CH4–CO2 reforming was successfully achieved in oxide ion conducting electrolysers with Cr2O3 coated Ni/YSZ cathodes.
Starting Page	47599
Ending Page	47608
Page Count	10
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	5
Issue Number	59
Journal	RSC Advances
DOI	10.1039/c5ra01927c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Methane Spectroscopy Chromite Electrode Ion Photoemission spectroscopy Scanning electron microscope Carbon X-ray crystallography Yttrium(III) oxide Transmission electron microscopy Chromium Electrochemistry Nickel Zirconium dioxide X-ray photoelectron spectroscopy Heterojunction
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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