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Citation: ZHAO Qing, ZHAI Guang-Jie, ZAERA Francisco. Conversion of Alcohol Oxidation on Ni(100) by Fluorine[J]. Acta Physico-Chimica Sinica, ;2007, 23(09): 1447-1450. doi: 10.3866/PKU.WHXB20070926 shu

Conversion of Alcohol Oxidation on Ni(100) by Fluorine

1.
Department of Physics, College of Science, Beijing Institute of Technology, Beijing 100081, P. R. China; Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100081, P. R. China; Department of Chemistry, University of California, Riverside 92521, California, USA

Received Date: 12 April 2007
Available Online: 28 June 2007

The temperature-programmeddesorption(TPD)was used tostudythe adsorptionandthermal decomposition of 2-propanol and trifluoro-2-propanol on clean Ni(100) surface. The products of TPD in both cases were traced for molecular desorption and for the products of dehydration (alkene) and dehydrogenation (ketone) reactions. The results showed that a partial switch from alcohol dehydrogenation to alcohol dehydration was driven by substitution of γ-hydrogen with more electronegative fluorine atoms. The inductive effect exerted by fluorine atoms substituted at the γ position led to a significant inhibition of β-hydride elimination from the alkoxide intermediates, and to the opening of a new γ-hydride elimination channel which eventually ended in alkene formation. While exclusive dehydrogenation to acetone via β-hydride elimination from 2-propoxide surface species was seen with 2-propanol, some dehydration to 3,3,3-trifluoropropene was observed with 1,1,1-trifluoro-2-propanol.
- 2-propanol; Trifluoro-2-propanol; TPD; Ni(100)
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