Support Effect of New Au/FeOx Catalysts in the Oxidative Dehydrogenation of α,ω-Diols to Lactones
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- 作者：Jie Huang ; Wei-Lin Dai ; Kangnian Fan
- 刊名：Journal of Physical Chemistry C
- 出版年：2008
- 出版时间：October 16, 2008
- 年：2008
- 卷：112
- 期：41
- 页码：16110-16117
- 全文大小：469K
- 年卷期：v.112,no.41(October 16, 2008)
- ISSN：1932-7455
文摘
FeOx of different crystal phases were synthesized by altering the calcination temperature of the precursors obtained by a hydrothermal method. Crystal transformation from maghemite to hematite begins at calcination temperature of 573 K. Gold was deposited on the support uniformly with average size of approximately 5 nm. It is found that the as-prepared catalysts show superior activity and selectivity to the commercial Fe2O3 supported gold catalysts in the oxidation of 1,4-butanediol and 1,5-pentanediol to the corresponding lactones. Support shows dramatic influence on the intrinsic properties of gold particles including particle size and electronic nature. Strong interaction between gold and the nanosized ferric oxide support was studied by XPS and TEM.