MOLYBDENUM-DISULFIDE AS A HYDROGEN EVOLUTION CATALYST FOR WATER PHOTODECOMPOSITION ON SEMICONDUCTORS

被引：62

作者：

SOBCZYNSKI, A

机构：

[1] Institute of Chemical Technology and Engineering, Technical University, 60-965 Poznan

来源：

JOURNAL OF CATALYSIS | 1991年 / 131卷 / 01期

关键词：

D O I：

10.1016/0021-9517(91)90332-X

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：

Six samples of silica-supported molybdenum disulfide were prepared by decomposition of MOS3/SiO2 in argon and hydrogen at 623, 673, and 723 K. The hexagonal MOS2 structure was confirmed by XRD. ESR analysis showed the presence of Mo5+ in all the samples. Electrochemical studies showed that although silica-supported molybdenum disulfide did not manifest any photoresponse, it possessed good hydrogen evolution properties. These properties were confirmed in catalytic studies, in the presence of V2+ in 2 M H2SO4, and in photocatalytic studies in the presence of CdS/SiO2 and TiO2 as sensitizers and methanol as a sacrificial electron donor. Very high activity of the sample calcined in argon at 623 K is regarded to be caused by its special surface properties connected to the presence of a large quantity of Mo5+ ions. The reduction of the excess of molybdenum(V) ions by evolving hydrogen is taken into account in the explanation of a long induction period in photosensitized hydrogen production. © 1991.

引用

页码：156 / 166

页数：11

共 43 条

[1]

BRUS L, 1987, NEW J CHEM, V11, P123

[2]

CALABRASE GC, 1981, J AM CHEM SOC, V103, P21

[3] THE NATURE OF HYDRODESULFURIZATION ON MOS2 [J].