Restructuring of hex-Pt(100) under CO gas environments: formation of 2-D nanoclusters.
Restructuring of hex-Pt(100) under CO gas environments: formation of 2-D nanoclusters.
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DOI：
10.1021/nl900809u
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发表时间：
2009-04
期刊：
影响因子：
10.8
通讯作者：
F. Tao;S. Dag;Lin-wang Wang;Zhi Liu;Derek R. Butcher;M. Salmeron;G. Somorjai
中科院分区：
文献类型：
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作者：
F. Tao;S. Dag;Lin-wang Wang;Zhi Liu;Derek R. Butcher;M. Salmeron;G. Somorjai
利用一种新设计的室中室式高压STM和理论计算研究了宽压力范围内CO诱导的hex-Pt（100）原子尺度的结构重构。实验和密度泛函理论计算结果表明，CO分子与Pt纳米团簇的结合是通过倾斜的顶面构型进行的，其间距约为3.7-4.1由吸附引起的金属催化剂表面的重构现象，特别是小金属簇的形成，表明研究高压条件下催化剂表面的结构对于理解催化机理的重要性。
The atomic-scale restructuring of hex-Pt(100) induced by carbon monoxide with a wide pressure range was studied with a newly designed chamber-in-chamber high-pressure STM and theoretical calculations. Both experimental and DFT calculation results show that CO molecules are bound to Pt nanoclusters through a tilted on-top configuration with a separation of approximately 3.7-4.1 A. The phenomenon of restructuring of metal catalyst surfaces induced by adsorption and, in particular, the formation of small metallic clusters suggests the importance of studying structures of catalyst surfaces under high-pressure conditions for understanding catalytic mechanisms.