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(NH 4 )AgMoS 4 : Synthesis, Structure and Catalytic Activity
Author(s) -
ShafaeiFallah Maryam,
Malliakas Christos D.,
Kanatzidis Mercouri G.
Publication year - 2012
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201200309
Subject(s) - isostructural , tetragonal crystal system , catalysis , microcrystalline , crystal structure , ammonia , chemistry , stoichiometry , monoclinic crystal system , inorganic chemistry , crystallography , selectivity , nuclear chemistry , organic chemistry
The synthesis, characterization and crystal structure of (NH 4 )AgMoS 4 is presented. (NH 4 )AgMoS 4 was prepared by the stoichiometric reaction of AgNO 3 with (NH 4 ) 2 MoS 4 . The black microcrystalline (NH 4 )AgMoS 4 is thermally unstable and contaminated by a phase that analyzes for Ag 2 MoS 4 . In the TGA continuous weight loss was observed corresponding to the loss of ammonia gas subsequent loss of sulfur and H 2 S to give Ag 2 S and MoS 2 . In the infrared spectrum of (NH 4 )AgMoS 4 , characteristic bands for the ammonium ion at 1350–1400 cm –1 and for the [MoS 4 ] 2– group at 460 cm –1 are observed. Crystals of (NH 4 )AgMoS 4 were investigated using a synchroton source. (NH 4 )AgMoS 4 is isostructural to (NH 4 )CuMoS 4 and crystallizes in the tetragonal space group I $\bar{4}$ ( Z = 2, a = 7.8740(3), c = 5.7733(4) Å). (NH 4 )AgMoS 4 can be used as a catalyst in the syngas conversion to higher alcohols with showing good activity and ethanol selectivity.