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

页码：675 / +

页数：2