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Catalysis Science & Technology
DOI: 10.1039/C5CY01043H
Catalysis Research & Technology
ARTICLE
R. Ahmad, M. Hellinger, M. Buchholz, H. Sezen, L. Gharnati, C. Wöll, J. Sauer,
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7
γ
2 3
-Al O and methanol catalyst (e.g., flame-made methanol
1
4
c
catalyst), the initial catalytic tests revealed a high DME
selectivity. Hence, those nanoparticle-derived systems provide
model kits, which will enable the future rational and individual
tuning of the catalytic components in bifunctional STD
catalysts.
,
8
(
8
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a monometallic reference catalyst. Further addition of
Zn(C and its subsequent hydrolysis yielded Cu/Zn-based
2
2 5 2
with Zn(C H ) .
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,
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2 3
supported on the dehydration catalyst (γ-Al O ) or integrated
into the STD catalyst by physical mixing. By using this
approach, active catalysts for the STD reaction with CO
conversions of up to 24% and selectivities of up to 68% were
obtained. Several material parameters were shown to affect
the sintering behavior and the catalytic characteristics of the
final STD catalyst. Consequently, well-defined nanoparticle
building units will open an encouraging avenue for the
preparation of bifunctional STD catalysts, enabling future
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Acknowledgements
The authors would like to kindly thank the following colleagues,
Sarah Essig and Hermann Köhler for technical assistance, Dr.
Henning Lichtenberg and Dr. Stefan Mangold for support during
XAS measurements, Thilo Henrich for discussions, Doreen
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Neumann-Walter and Dr. Thomas Otto for support with BET and 24 B. Lindström, L. J. Pettersson, P. Govind Menon, Appl. Catal. A, 2002, 234, 111-
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TPR analysis. Acknowledgement is further given to the ANKA
synchrotron radiation source (KIT, Karlsruhe) for providing
beamtime at the XAS beamline. M.G. acknowledges financial
support of the Helmholtz Research School Energy-Related Catalysis.
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