In situ H-1 NMR investigation of hydrogen adsorption on a Cu/MgO catalyst

被引:4
作者
Chesters, MA [1 ]
Packer, KJ [1 ]
Viner, HE [1 ]
Wright, MAP [1 ]
机构
[1] UNIV NOTTINGHAM,DEPT CHEM,NOTTINGHAM NG7 2RD,ENGLAND
来源
JOURNAL OF PHYSICAL CHEMISTRY B | 1997年 / 101卷 / 48期
关键词
D O I
10.1021/jp9715484
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 adsorption on a Cu/MgO catalyst is investigated using in situ H-1 NMR. The adsorption is largely homogeneous, demonstrating reasonable agreement with the Langmuir isotherm and only small variations in the frequency shift and spin-lattice relaxation time with increasing coverage. The catalyst is investigated under flowing gas conditions, and the hydrogen/deuterium exchange kinetics are studied. The activation energy for exchange is measured to be 96 kJ mol(-1). The H-1 variable-temperature NMR probe developed here and used for the in situ adsorption isotherm and the flowing gas experiments is also described.
引用
收藏
页码:9995 / 10003
页数:9
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