CHARACTERIZATION OF SULFIDED MO/AL2O3 CATALYSTS BY TEMPERATURE-PROGRAMMED REDUCTION AND LOW-TEMPERATURE FOURIER-TRANSFORM INFRARED-SPECTROSCOPY OF ADSORBED CARBON-MONOXIDE

被引：90

作者：

MULLER, B

VANLANGEVELD, AD

MOULIJN, JA

KNOZINGER, H

机构：

[1] UNIV MUNICH,INST PHYS CHEM,SOPHIENSTR 11,D-80333 MUNICH,GERMANY

[2] DELFT UNIV TECHNOL,FAC CHEM TECHNOL & MAT SCI,2682 BL DELFT,NETHERLANDS

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 35期

关键词：

D O I：

10.1021/j100137a031

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：

Sulfided Mo/Al2O3 catalysts were studied by temperature-programmed reduction (TPRS) and transmission infrared spectroscopy of adsorbed CO at low temperatures. Reductive elimination of nonstoichiometric and stoichiometric sulfur from edge and corner sites creates coordinatively unsaturated Mo2+ sites. C-O stretching bands at 2100 cm-1 and at ca. 2060-2070 cm-1 were attributed to CO adsorption complexes on edge and corner sites, respectively. Evidence of morphological changes Of MoS2 slabs during H-2 treatment at 770 K is provided. IR spectroscopy of adsorbed CO at low temperature provides unique possibilities for the characterization of sulfided catalysts.

引用

页码：9028 / 9033

页数：6

共 39 条

[1]

ANGULO M, 1987, B SOC CHIM BELG, V96, P925

[2]

BACHELIER J, 1981, B SOC CHIM BELG, V90, P1301

[3]

BACHELIER J, 1984, B SOC CHIM BELG, V93, P743

[4] INFRARED SPECTROSCOPIC OBSERVATIONS OF SURFACE BONDING IN PHYSICAL ADSORPTION - THE PHYSICAL ADSORPTION OF CO ON SIO2 SURFACES [J].