Time-resolved DXAFS study of adsorption and release of hydrogen on Pt/MCM-41

被引：1
|
作者：
Suzuki, Akane [1 ]
Inada, Yasuhiro [1 ]
Asakura, Kiyotaka [2 ]
Nomura, Masaharu [1 ]
机构：
[1] Inst Mat Struct Sci, KEK, Photon Factory, Tsukuba, Ibaraki 3050801, Japan
[2] Hokkaido Univ, Ctr Catalysis Res, Sapporo, Hokkaido 0010021, Japan
来源：
X-RAY ABSORPTION FINE STRUCTURE-XAFS13 | 2007年 / 882卷
关键词：
adsorption and release of hydrogen; time-resolved XAFS;
D O I：
10.1063/1.2644629
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We have clarified the adsorption and release mechanism of hydrogen to/from Pt clusters on an MCM-41 surface by using the XAFS technique. After reduction, the icosahedral Pt13 cluster of r(Pt-Pt) =0.273 nm is formed. In contrast, a very small oxidized metal particle of r(Pt-Pt) = 0.254 nm is formed after the oxidation. We have measured time-resolved energy dispersive XAFS in order to clarify the adsorption and release mechanism of hydrogen to/from Pt clusters on an MCM-41 surface. Although the reduction process can be explained as the sum of the initial and the final species, a third species should be considered in the oxidation process.
引用
收藏
页码：675 / +
页数：2
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