Journal
CATALYSIS COMMUNICATIONS
Volume 72, Issue -, Pages 43-48Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2015.09.005
Keywords
Activated carbon; Wacker-type catalyst; Chemical treatment; Dimethyl carbonate; Phenolic group
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Funding
- National Science Foundation of China [20936003, 21325626, 21176179]
- Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP) [20090032110021]
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A series of supported Wacker-type catalysts under treatment of nitric acid were prepared and utilized in the synthesis of dimethyl carbonate from CO and methyl nitrite. Nitrogen adsorption, Boehm titration, scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and H-2-temperature-programmed reduction (H-2-TPR) were employed to explore the relationship between the physicochemical properties and reactivity of catalysts. Correlated with the results of Boehm titration, it was found that catalytic activities increased monotonically with the number of phenolic group on activated carbon surface. XPS spectra showed that the catalysts, which had much more amount of phenolic group, were possessed of large amount of Cu2+ species. H-2-TPR results indicated that the phenolic group contributed to the easier reducibility of Cu2+ species, further facilitating the oxidation cycle between Pd and Cu species and consequently the catalytic performance. (C) 2015 Elsevier B.V. All rights reserved.
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