Molecular sensing techniques for the characterization and design of new ammonia catalysts

被引：42

作者：

Aika, K

Kubota, J

Kadowaki, Y

Niwa, Y

Izumi, Y

机构：

[1] Dept. of Environ. Chem. and Eng., Tokyo Institute of Technology, Yokohama 226, 4259 Nagatsula, Midori-ku

来源：

APPLIED SURFACE SCIENCE | 1997年 / 121卷

关键词：

ammonia synthesis; N-2; activation; ruthenium catalyst; FTIR of adsorbed dinitrogen; FTIR of adsorbed hydrogen; alkali effect;

D O I：

10.1016/S0169-4332(97)00343-7

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：

The N-N stretching frequency of adsorbed dinitrogen on the actual (supported or promoted) Ru catalysts has been shown to be extremely sensitive to the electronic state of the active surface which is usually hard to detect even by XPS. The wavenumber was also a good index of the N-2 activation and ammonia synthesis on these Ru catalysts. Atomically adsorbed hydrogen and its effect on N-2 activation was also observed by FTIR. The addition of alkali promotes N-2 activation on Ru although it causes strong hydrogen poisoning. These various techniques have been discussed with regard to the development of the 'second generation ammonia catalyst'. (C) 1997 Elsevier Science B.V.

引用

页码：488 / 491

页数：4

共 7 条

[1] PREPARATION AND CHARACTERIZATION OF CHLORINE-FREE RUTHENIUM CATALYSTS AND THE PROMOTER EFFECT IN AMMONIA-SYNTHESIS .3. A MAGNESIA-SUPPORTED RUTHENIUM CATALYST [J].