Sk. Srivastava et Bn. Avasthi, PREPARATION AND CHARACTERIZATION OF MOLYBDENUM-DISULFIDE CATALYSTS, Journal of Materials Science, 28(18), 1993, pp. 5032-5035
Molybdenum disulphide has been prepared by atmospheric-pressure hydrog
en reduction of molybdenum trisulphide in the temperature range 400-75
0-degrees-C for 4 h and characterized. Chemical analysis of the produc
t confirmed the S to Mo ratio 2.00 as desired for MoS2, consistent wit
h its thermogravimetric analysis data in an air atmosphere. MoS2 prepa
red under these reducing conditions possessed a hexagonal structure wi
th n-type diamagnetic semiconducting behaviour and a lower surface are
a. The catalytic activity of the MoS2 was studied for liquid-phase hyd
rogenation of nitrobenzene. X-ray studies on MoS3 when reduced at 750-
degrees-C for 48 h indicated that MoS2 So formed is unstable, resultin
g in the formation of its over-reduced products Mo2S3 and Mo.