In-situ XRD studies during electrochemical processes in the ternary CrO3H2SO4-graphite intercalation compound
✍ Scribed by J.M. Skowronski; H. Shioyama
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 564 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0008-6223
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✦ Synopsis
The results of this paper have shown that the ternary stage-2 CrO,PH,SO,-graphite intercalation compound is electrochemically formed on the subsequent intercalation of H,SO, into the host stage-5 CrO,-GIG/graphite matrix. In contrast to the binary H,SO,-GIC easily deintercalated upon cathodic reduction, stage-(4-6)
CrO,-H,SO,-GICs are preserved despite the application of a deintercalation potential as low as -0.2 V vs the Hg/Hg,SO,/18hr HISO, as the reference. An increase in the overpotential of the reaction of hydrogen evolution is noted during deintercalation of the ternary compound.
The product of deintercalation of stage-2 CrO,-H,SO,-GIC with water appeared to be of the same stage number as the starting CrO,-GIC but of a better ordered structure.