期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 118, 期 48, 页码 28007-28016出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp509533g
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资金
- FAPERJ
- CNPq
- Commonwealth of Kentucky
The catalytic activity of high specific area CeO2 center dot SiO2 was investigated under a flowing ethanol/steam mixture at 773 K. An attempt was made to tune the oxygen mobility of the catalyst further by doping it with small amounts of certain early transition metal oxides (V, Cr, Mn, Nb, Mo, W). Among the dopants studied, Mn, Cr, and, to a lesser extent, W drive the reaction pathway toward acetone synthesis. These dopants likely promote acetone synthesis by (i) enhancing oxygen mobility and thereby accelerating the oxidation of ethanol derived adsorbed species toward acetates, (ii) limiting the buildup of carbonate species, and (iii) suppressing the ethanol dehydration pathway.
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