期刊
FARADAY DISCUSSIONS
卷 152, 期 -, 页码 185-201出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1fd00013f
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology, Japan [B01]
- JSPS
- Project on Strategic Utilization of Elements
The specific role played by small gold nanoparticles supported on the rutile TiO2(110) surface in the processes of adsorption and dissociation of H-2 is discussed. It is demonstrated that the molecular and dissociative adsorption of H-2 on Lambda u(n) clusters containing n = 1, 2, 8 and 20 atoms depends on cluster size, geometry structure, cluster flexibility and the interaction with the support material. Rutile TiO2(110) support energetically promotes H-2 dissociation on gold clusters. It is demonstrated that the active sites towards H-2 dissociation are located at corners and edges on the surface of the gold nanoparticle in the vicinity of the support. The low coordinated oxygen atoms on the TiO2(110) surface play a crucial role for H-2 dissociation. Therefore the catalytic activity of a gold nanoparticle supported on the rutile TiO2(110) surface is proportional to the length of the perimeter interface between the nanoparticle and the support.
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