Two types dissolution of platinum in acid media. An electrochemical nanogravimetric study

G. Inzelt, B. B. Berkes, A. Kriston

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Smooth and platinized platinum electrodes in contact with sulfuric acid solutions were studied using electrochemical quartz crystal nanobalance (EQCN) technique at different temperatures. Two types of dissolution processes have been observed. A platinum loss was detected during the reduction of platinum oxide, the extent of which depends on the positive potential limit and the scan rate, and to a lesser extent on the temperature. The platinum dissolution during the electroreduction of oxide is related to the interfacial place exchange of the oxygen and platinum atoms in the oxide region. At elevated temperatures two competitive processes take place at high positive potentials: a dissolution of platinum and platinum oxide formation. These phenomena are of importance regarding the long-term stability of proton exchange fuel cells.

Original languageEnglish
Title of host publicationElectrochemistry
Subtitle of host publicationSymposium on Interfacial Electrochemistry in Honor of Brian E. Conway
Pages137-156
Number of pages20
Edition23
DOIs
Publication statusPublished - Dec 1 2010
EventElectrochemistry: Symposium on Interfacial Electrochemistry in Honor of Brian E. Conway - 216th ECS Meeting - Vienna, Austria
Duration: Oct 4 2009Oct 9 2009

Publication series

NameECS Transactions
Number23
Volume25
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

OtherElectrochemistry: Symposium on Interfacial Electrochemistry in Honor of Brian E. Conway - 216th ECS Meeting
CountryAustria
CityVienna
Period10/4/0910/9/09

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Inzelt, G., Berkes, B. B., & Kriston, A. (2010). Two types dissolution of platinum in acid media. An electrochemical nanogravimetric study. In Electrochemistry: Symposium on Interfacial Electrochemistry in Honor of Brian E. Conway (23 ed., pp. 137-156). (ECS Transactions; Vol. 25, No. 23). https://doi.org/10.1149/1.3328518