A new characterization method for adsorbed hydrogen on supported Pt particles

被引：23

作者：

Asakura, K ^{[1
]}

Kubota, T ^{[1
]}

Ichikuni, N ^{[1
]}

Iwasawa, Y ^{[1
]}

机构：

[1] UNIV TOKYO, GRAD SCH SCI,DEPT CHEM,BUNKYO KU, TOKYO 113, JAPAN

来源：

11TH INTERNATIONAL CONGRESS ON CATALYSIS - 40TH ANNIVERSARY, PTS A AND B | 1996年 / 101卷

关键词：

D O I：

10.1016/S0167-2991(96)80302-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We measured Pt L(3), L(2) and L(1)-edges X-ray absorption near edge structure (XANES) spectra of Pt particles dispersed on metal oxide supports (SiO2, Al2O3 and MgO) with and without hydrogen adsorption. The difference spectra obtained by subtracting the spectra in vacuum from the ones with adsorbed hydrogen were independent of kind of the support and only dependent on the amount of adsorbed hydrogen. It was suggested that the change can not be only explained by the change of density of Pt 5d unoccupied state but by creation of a resonance state associated with the localized Pt-H interaction. We also found a linear relation between the change in the XANES spectra and the amount of adsorbed hydrogen, which provides a new characterization method for adsorbed hydrogen on supported Pt particles.

引用

页码：911 / 919

页数：9

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