Metal Particle Size Effects and Metal-Support Interaction in Electrochemically Treated Pt/C Catalysts Investigated by [sup 13]C NMR
- 1 January 2005
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 152 (12), J131-J135
- https://doi.org/10.1149/1.2077327
Abstract
The NMR data obtained after adsorbing C13OC13O on Pt by partial oxidation of C13H3OHC13H3OH showed a nonlinear variation of the chemical shift and the linewidth with decreasing particle size, more change for average sizes less than 5nm5nm , which can be explained in terms of the variation of relative populations of different CO adsorption sites. There was also a noticeable increase in the chemical shift of CO adsorbed on carbon-supported Pt catalysts as compared to Pt black samples of similar size, which we attribute to a metal-support interaction in the supported catalysts.Keywords
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