Electrochemical durability of carbon nanotubes in noncatalyzed and catalyzed oxidations
Journal of the Electrochemical Society, ISSN: 0013-4651, Vol: 153, Issue: 10
2006
- 154Citations
- 10Usage
- 57Captures
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Metrics Details
- Citations154
- Citation Indexes154
- 154
- CrossRef123
- Usage10
- Downloads10
- Captures57
- Readers57
- 57
Article Description
Noncatalyzed and catalyzed electrochemical oxidations of multiwalled carbon nanotubes (CNTs) were studied with the aim to understand their durability as catalyst support in polymer electrolyte membrane (PEM) fuel cells. Bare and Pt-deposited CNTs were investigated in 1.0 M sulfuric acid at a constant potential of 1.2 V. Carbon black (CB, Vulcan XC-72R) was also studied under the same experimental conditions. The carbons were oxidized at room temperature in the form of thin-film electrodes with time durations up to 48 h. Cyclic voltammetry was used to monitor the surface oxide redox reactions as a way to quantify the degree of surface oxidation on the carbons. It was found that the redox current peaks were stabilized after 8 h for CNTs, but they continue to increase for CB, showing that CNTs are more resistant to electrochemical oxidation. Similar trends were observed in the catalyzed oxidation with Pt-deposited carbons. However, much larger currents were observed, demonstrating that catalyzed oxidation had indeed occurred. The observed durability demonstrated that CNTs would be a better catalyst support in PEM fuel cells in which the commonly used CB often undergoes severe electrochemical corrosion. © 2006 The Electrochemical Society. All rights reserved.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=33748428451&origin=inward; http://dx.doi.org/10.1149/1.2234659; https://iopscience.iop.org/article/10.1149/1.2234659; https://scholarsmine.mst.edu/che_bioeng_facwork/1796; https://scholarsmine.mst.edu/cgi/viewcontent.cgi?article=2796&context=che_bioeng_facwork; https://dx.doi.org/10.1149/1.2234659; https://hkvalidate.perfdrive.com/?ssa=5527f2c7-d4c2-4622-af87-1723490b563c&ssb=72730228197&ssc=https%3A%2F%2Fiopscience.iop.org%2Farticle%2F10.1149%2F1.2234659&ssi=9058cc19-8427-4f29-8f59-7132c008c1e1&ssk=support@shieldsquare.com&ssm=18072321735902338988815370652487965&ssn=4643788df0fe49012ca6321314b0d1156f4b5f7e19bd-e61d-41a3-96ffb5&sso=75842da3-a62fca3554b12d8f1fd47d233b00eb4f97785cbb5d835094&ssp=01256021791611148227161206838808962&ssq=05052985549596823741570239123637526164787&ssr=NTIuMy4yMTcuMjU0&sst=com.plumanalytics&ssv=&ssw=
The Electrochemical Society
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