Methanol-driven structuring of Au-Pt bimetallic nanoclusters on a thin film of Al<sub>2sub>O<sub>3sub>/NiAl(100)

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• 作者：Chiun-Yu Ho<sup>asup> ; Rahul B. Patil<sup>asup> ; Chao-Chuan Wang<sup>asup> ; Chen-Sheng Chao<sup>asup> ; Yu-Da Li<sup>asup> ; Hsing-Chung Hsu<sup>asup> ; Meng-Fan Luo<sup>asup><sup> ; sup><sup>mfl28@phy.ncu.edu.twsup> ; Yin-Chang Lin<sup>bsup> ; Yu-Lin Lai<sup>bsup> ; Yao-Jane Hsu<sup>bsup><sup> ; sup><sup>yjhsu@nsrrc.org.twsup>
• 关键词：Gold ; Platinum ; Bimetallic nanoclusters ; Aluminum oxide ; Methanol ; Photoelectron spectra
• 刊名：Surface Science
• 出版年：2012
• 期刊代码：104_00396028
• 类别：ch
• 出版时间：August, 2012
• 卷：606
• 期：15-16
• 页码：1173-1179
• 文件大小：1319 K

摘要

The adsorption of methanol altered structures of Au-Pt bimetallic nanoclusters on a thin film of Al<sub>2sub>O<sub>3sub>/NiAl(100). Methanol adsorbed on the Au-Pt intermixed bimetallic clusters, of which the surfaces consist of both Au and Pt, induced a segregation of Au from Pt. This segregation state was unstable, as the clusters returned to the initial Au-Pt intermixed state upon desorption or decomposition of adsorbed methanol. Ethanol and cyclohexene were adsorbed on Au-Pt bimetallic clusters for comparisons, indicating that the interaction of the hydroxyl group of methanol with the clusters accounts for the structural modifications.