Cobalt–molybdenum interaction in oxidic precursors of zeolite-supported HDS catalysts

Literature Information

Publication Date 2002-07-02
DOI 10.1039/B201785G
Impact Factor 3.676
Authors

Edmond Payen, John Lynch


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Abstract

Two methods of synthesis of oxidic precursors of zeolite-supported HDS catalysts have been compared—the co-impregnation of cobalt nitrate and ammonium heptamolybdate, and the one-step impregnation of the Anderson cobaltomolybdate anion. 27Al MAS NMR and Raman spectroscopic characterisations have shown that in the first case, the Anderson aluminomolybdate anion is formed, whereas the cobalt Anderson entity is preserved in the second case. Mo and Co K-edges EXAFS measurements have shown that in the first case no cobalt–molybdenum interaction is observed, unlike in the second case. It has finally been seen that a calcination–rehydration treatment gives the same final product for both preparations, with the presence of the aluminomolybdate anion, to the detriment of the cobalt–molybdenum interaction.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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