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X-ray absorption near-edge structure (XANES) spectra at the Pt L3-edge for Pt particles supported on SiO2 under CO adsorption and CO+H2 coadsorption were recorded to analyze the amount of adsorbed hydrogen in the coadsorbed state on the Pt particles. Adsorbed CO on the Pt particles revealed a new peak at 6 eV above the Pt L3-edge in the difference spectra before and after CO adsorption in the coverage...
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