A Raman spectroscopic study of the carbon deposition mechanism on Ni/CGO electrodes during CO/CO2 electrolysis

In situ and ex situ Raman analyses of porous Ni/CGO electrodes reveal differences in the amount, location and type of carbon formed during CO/CO 2 electrolysis. The results demonstrate the limitations of optical in situ techniques applied to Solid Oxide Cells (SOCs) operated in electrolysis conditio...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2014-07, Vol.16 (26), p.1363-1368
Main Authors: Duboviks, V, Maher, R. C, Kishimoto, M, Cohen, L. F, Brandon, N. P, Offer, G. J
Format: Article
Language:English
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Summary:In situ and ex situ Raman analyses of porous Ni/CGO electrodes reveal differences in the amount, location and type of carbon formed during CO/CO 2 electrolysis. The results demonstrate the limitations of optical in situ techniques applied to Solid Oxide Cells (SOCs) operated in electrolysis conditions. Increased carbon deposition close to the electrode-electrolyte interface is likely to be the result of high charge-transfer current in that area. The positive effect of a CGO interlayer on reducing carbon formation on the fuel electrode is demonstrated. In situ and ex situ Raman analyses of porous Ni/CGO electrodes reveal differences in the amount, location and type of carbon formed during CO/CO 2 electrolysis. The majority of the carbon forms in the region of the anode, which lies in the range of ca . 4 micrometers from the electrode-electrolyte interface.
ISSN:1463-9076
1463-9084
DOI:10.1039/c4cp01503g