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.
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页码：9028 / 9033
页数：6
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