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Determination of the Activation Volume for CO Oxidation on Platinum by Pressure Modulation
Author(s) -
Wang HanChun,
Baltruschat Helmut
Publication year - 2010
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201000253
Subject(s) - platinum , volume (thermodynamics) , chemistry , oxidation state , modulation (music) , value (mathematics) , analytical chemistry (journal) , nanotechnology , computer science , organic chemistry , materials science , thermodynamics , catalysis , physics , machine learning , acoustics
Highly charged! A pressure‐modulation technique is applied to determine the activation volume for CO oxidation on platinum. The negative value obtained suggests the formation of the positively charged transition state [H + ⋅⋅⋅O⋅⋅⋅CO] ≠ (see figure; grey: Pt; red: O; black: C; blue: H) for which the volume is largely reduced with respect to that of the reactants.