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Citation: Diao Zhao-Yu, Dong Chen-Chu, Wang Ze-Xin. Adsorption and Vibration of Oxygen Atom on Low Index Pt Planes[J]. Acta Physico-Chimica Sinica, ;2004, 20(09): 1123-1128. doi: 10.3866/PKU.WHXB20040913 shu

Adsorption and Vibration of Oxygen Atom on Low Index Pt Planes

1.
Department of Chemistry, Shandong Normal University, Jinan　250014

Received Date: 26 February 2004
Available Online: 15 September 2004

The 5-parameter morse potential (5-MP) of interaction between an adatom and metal surface cluster is put forward and performed on O-Pt low index surface systems. The characteristics of critical points are obtained. The theoretical results show that oxygen atom can only adsorb at the four-fold hollow site on Pt (100) ;O adsorbs at the three-fold hollow site and the long-bridge site on the (110) missing-row reconstruction surface. We ulteriorly analyze heredity and variation of vibrational fingerprint properties of three-fold state on Pt(111). We confirm that the experimental data of 59.49 meV and 40.90 meV in the electron energy loss spectrum on the (110) missing-row reconstruction surface belong to vertical vibrations of adsorption states, which are produced by oxygen atom on the three-fold hollow site and long-bridge site, respectively.
- O-Pt system;5-MP;Adsorption and diffusion;Low index surfaces;　Vibrational fingerprint
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