G. Zhao et al. / Journal of Catalysis 301 (2013) 46–53
53
prepared by impregnating Ni-fiber with Ni(NO3)2 solution (to
Appendix A. Supplementary material
3 wt% NiO), drying at 80 °C overnight, and calcining at 300 °C.
The benzyl alcohol conversion was only 5% at 280 °C over
NiO-3/Ni-fiber. In order to further address this question, two more
contrastive catalysts, NiO-3/Ti-fiber and Au-4/Ti-fiber, were pre-
pared by the same method as for the NiO-3/Ni-fiber catalyst except
using Ti-fiber as support, yielding the benzyl alcohol conversion of
less than 10%. Interestingly, the Au-4/Ti-fiber catalyst after
re-impregnation with Ni(NO3)2 solution (to 3 wt% NiO) followed
by calcination at 300 °C, yielded a sharp promotion of the benzyl
alcohol conversion up to 94% at 280 °C. These results obviously
indicated that the Au–NiO composites play an essential role in con-
tributing the activity for alcohol oxidation, which is consistent
with the reported Au catalysts supported on NiO for CO [39] and
alcohol oxidation [48]. One can thus say that the pre-activation
process over the Au/Ni-fiber catalyst by nature facilitated the
NiCl2-to-NiO transformation to form the Au–NiO composites,
which led sharp promotion of the catalyst activity for alcohol
oxidation.
Supplementary data associated with this article can be found, in
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DT of <10 °C between the
catalyst bed and reactor external wall was observed in the selective
oxidation of benzyl alcohol, owing to the enhanced heat-transfer
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This work was funded by the NSF of China (21273075,
21076083, 20973063), the ‘‘973 program’’ (2011CB201403) from
the MOST of China, the Fundamental Research Funds for the
Central Universities, the Shanghai Rising-Star Program
(10HQ1400800), the Specialized Research Fund for the Doctoral
Program of Higher Education (20090076110006), and the Shanghai
Leading Academic Discipline Project (B409). We thank the Electron
Spectroscope Center of the East China Normal University for
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