Oxygen Reduction on Small Supported Platinum Particles: II . Characterization by X‐ray Absorption Spectroscopy
Open Access
- 1 October 1988
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 135 (10) , 2535-2538
- https://doi.org/10.1149/1.2095371
Abstract
X‐ray absorption spectra at the edge were obtained during the electrochemical reduction of for an electrocatalyst containing 1 nm clusters of Pt on carbon. Changes in the threshold peak area and edge position in the spectra suggest that the oxidation state of the metal decreases linearly with the applied potential in the range from 1010 to 900 mV (NHE), much like the behavior of bulk Pt electrodes. However, the overall oxidation state of the clusters is consistent with a surface stoichiometry nearer rather than proposed for the surface of bulk electrodes.Keywords
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