期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 111, 期 14, 页码 5514-5519出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp070181s
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The dissociative chemisorption of dihydrogen on a Pt-6 cluster with an octahedral configuration was studied with density functional theory. The on-top site was identified to be the most favorable chemisorption site for dihydrogen followed by the bridge site and the 3-fold hollow site. It was found that the dissociative chemisorption process is dictated by the charge transfer from the Pt cluster to H-2 molecules via the overlap of 5d orbitals of Pt-6 and 1 sigma* orbital of H-2 and that the cluster achieves its full saturation with H atoms at the Pt/H ratio of 1:4. The effect of H coverage on the Pt cluster catalytic activities was discussed.
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