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dc.contributor.author
Kaminski, Piotr
dc.contributor.author
Ziolek, Maria
dc.contributor.author
van Bokhoven, Jeroen A.
dc.date.accessioned
2017-09-13T12:30:51Z
dc.date.available
2017-09-13T12:30:51Z
dc.date.available
2017-09-13T12:22:43Z
dc.date.available
2017-09-13T12:02:08Z
dc.date.available
2017-06-12T19:43:55Z
dc.date.issued
2017
dc.identifier.issn
2046-2069
dc.identifier.other
10.1039/c6ra27671g
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/185184
dc.identifier.doi
10.3929/ethz-b-000184620
dc.description.abstract
The main goal of this work was the synthesis of mesoporous ceria, zirconia and cerium–zirconium oxides, the application of these supports for the preparation of monometallic (copper or gold) and bimetallic (copper and gold) catalysts and characterisation of their performance in the oxidation of glycerol in basic aqueous solution in the presence of oxygen. The methods applied for the study included: adsorption/desorption of nitrogen, XRD, ICP-OES, XPS, UV-vis, STEM-EDXS, H2-TPR. The presence of the following species Au0, Auδ+, negatively charged gold Au− or Au0 in bimetallic particles, Cu+, Cu2+, Ce3+ and Ce4+, Zr4+ was confirmed and their content was found to depend on the catalyst composition. The interaction between gold and copper species in bimetallic samples caused the formation of the negative charge on gold and the increase of the amount of Cu+ cations on the catalyst surface. This feature and the higher gold dispersion gave rise to a significant increase in the catalytic activity in glycerol oxidation of bimetallic catalysts with respect to that of monometallic samples. The high selectivity to glyceric acid (GLA) is an important advantage of the bimetallic catalysts (copper–gold), especially those loaded on mixed cerium–zirconium oxides. The bimetallic catalysts were stable and in the second run of the reaction they almost did not change glycerol conversion and increased the selectivity to GLA. The texture parameters of the catalysts had also impact on the selectivity of the reaction: the lower the microporosity the higher the selectivity to GLA. The role of the support is the interaction with copper and gold active species and enhancement of the reagents' chemisorption and electron transfers.
en_US
dc.language.iso
en
en_US
dc.publisher
Royal Society of Chemistry
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc/3.0/
dc.title
Mesoporous cerium–zirconium oxides modified with gold and copper – synthesis, characterization and performance in selective oxidation of glycerol
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial 3.0 Unported
dc.date.published
2017-01-23
ethz.journal.title
RSC Advances
ethz.journal.volume
7
en_US
ethz.journal.issue
13
en_US
ethz.pages.start
7801
en_US
ethz.pages.end
7819
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.identifier.nebis
006752154
ethz.publication.place
London
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02516 - Inst. f. Chemie- und Bioingenieurwiss. / Inst. Chemical and Bioengineering::03746 - Van Bokhoven, Jeroen A. / Van Bokhoven, Jeroen A.
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02516 - Inst. f. Chemie- und Bioingenieurwiss. / Inst. Chemical and Bioengineering::03746 - Van Bokhoven, Jeroen A. / Van Bokhoven, Jeroen A.
en_US
ethz.date.deposited
2017-06-12T19:44:21Z
ethz.source
FORM
ethz.source
ECIT
ethz.identifier.importid
imp59365540b843393010
ethz.ecitpid
pub:191333
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-09-15T12:03:08Z
ethz.rosetta.lastUpdated
2018-11-05T19:38:31Z
ethz.rosetta.versionExported
true
dc.identifier.olduri
http://hdl.handle.net/20.500.11850/184620
dc.identifier.olduri
http://hdl.handle.net/20.500.11850/128423
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Mesoporous%20cerium%E2%80%93zirconium%20oxides%20modified%20with%20gold%20and%20copper%20%E2%80%93%20synthesis,%20characterization%20and%20performance%20in%20selective%2&rft.jtitle=RSC%20Advances&rft.date=2017&rft.volume=7&rft.issue=13&rft.spage=7801&rft.epage=7819&rft.issn=2046-2069&rft.au=Kaminski,%20Piotr&Ziolek,%20Maria&van%20Bokhoven,%20Jeroen%20A.&rft.genre=article&
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