Oxidation of highly dispersed platinum on graphite catalysts in gaseous and aqueous media

J.A.A. Tillaart, van den, B.F.M. Kuster, G.B.M.M. Marin

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

To investigate the interaction of oxygen with platinum in gaseous and aq. media, in-situ x-ray absorption spectra (XAS) of a highly dispersed Pt/graphite catalyst were measured at the Pt LIII and LII edge for samples exposed to hydrogen or oxygen. White-line surface areas were detd. to evaluate the relative degree of oxidn. of the Pt. EXAFS was used to det. the local environment of the Pt. Both techniques show a corrosive oxidn. for the samples contacted with O2, in contrast to chemisorption of most probably a hydroxide species for the samples contacted with oxygen in water. The redn. of highly dispersed oxidized Pt is easily accomplished by H2 in both media
Original languageEnglish
Title of host publicationCatalytic selective oxidation
EditorsT. Oyama, J.W. Hightower
Place of PublicationWashington, D.C.
PublisherAmerican Chemical Society
Pages298-307
ISBN (Print)9780841226371
DOIs
Publication statusPublished - 1993

Publication series

NameACS Symposium Series
Volume523
ISSN (Print)0097-6156

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