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X‐Ray Spectroscopic Studies of the Surface Species in CoMoAl 2 O 3 Hydrodesulphurization Catalysts
Author(s) -
Sarode P. R.,
Sankar G.,
Srinivasan A.,
Vasudevan S.,
Rao C. N. R.,
Thomas J. M.
Publication year - 1984
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198403231
Subject(s) - hydrodesulfurization , xanes , catalysis , extended x ray absorption fine structure , sulfur , inorganic chemistry , chemistry , cobalt , ion , molybdenum , thiophene , materials science , absorption spectroscopy , spectroscopy , organic chemistry , physics , quantum mechanics
Octahedrally coordinated Co II and Mo IV species are present on the surfaces of sulfided CoMoAl 2 O 3 catalysts used for hydrodesulfurization. They were characterized by XPE, EXAFS and XANES data. An “excess” of sulfur in the surface species can be explained in terms of the presence of S 2 2⊖ions. Disulfide bridges could play a role in the hydrodesulfurization.