Hydrogen adsorption on Ru/ZrO2 studied by FT-IR

被引：36
|
作者：
Ishikawa, H [1 ]
Kondo, JN [1 ]
Domen, K [1 ]
机构：
[1] Tokyo Inst Technol, Resources Utilizat Res Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 1999年 / 103卷 / 16期
关键词：
D O I：
10.1021/jp9842852
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：
Hydrogen adsorbed on Ru/ZrO2 was studied by FT-IR (Fourier transform infrared) spectroscopy. While the Ru-H (Ru-D) species was not observed, the H2O (D2O)-like species was formed by H-2 (D-2) introduction on ZrO2. The H2O (D2O)-like species was characterized by a band at around 1600 (1190) cm(-1) due to the bending mode and by a broad band at 2500-3800 (2000-2700) cm(-1) attributed to the stretching mode. The H2O (D2O)-like species was stable under evacuation at 300 K, but desorbed as H-2 (D-2) at 370 K. The H2O (D2O)-like species was considered to be produced by spillover of hydrogen (deuterium) atoms dissociatively adsorbed on Ru particles to react with the surface lattice oxygen atoms of ZrO2. The heat of formation and the activation energy of the H2O (D2O)-like species formation from H-2 (D-2) were 134 +/- 11 (172 +/- 11) kJ mol(-1) and 28.6 +/- 3.2 (36.6 +/- 5.6) kJ mol(-1), respectively. The difference between the H2O-like species and adsorbed H2O molecules on Ru/ZrO2 was also examined.
引用
收藏
页码：3229 / 3234
页数：6
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