Show simple item record

dc.contributor.author
Mostrou-Moser, Sotiria
dc.contributor.author
Newton, Mark A.
dc.contributor.author
Tarcevski, Andreas
dc.contributor.author
Nagl, Andreas
dc.contributor.author
Föttinger, Karin
dc.contributor.author
van Bokhoven, Jeroen A.
dc.date.accessioned
2021-03-26T11:34:43Z
dc.date.available
2021-01-04T17:50:13Z
dc.date.available
2021-02-02T14:01:17Z
dc.date.available
2021-03-26T11:34:43Z
dc.date.issued
2021-02-03
dc.identifier.issn
1520-5045
dc.identifier.issn
0888-5885
dc.identifier.other
10.1021/acs.iecr.0c02939
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/459177
dc.identifier.doi
10.3929/ethz-b-000459177
dc.description.abstract
The heterogeneously catalyzed oxidation of bioethanol offers a promising route to bio-based acetic acid. Here, we assess an alternative method to support gold nanoparticles, which aims to improve selectivity to acetic acid through minimizing over-oxidation to carbon dioxide. The most promising support system is 5 wt % titanium on silica, which combines the high surface area of silica with the stabilizing effect of titania on the gold particles. Compared to gold–silica systems, which require a complex synthesis method, small quantities of titanium promoted the formation of gold nanoparticles during a simple deposition–precipitation. Characterization of the catalyst with X-ray absorption spectroscopy shows that titanium is highly dispersed in the form of small, possibly dimeric, titanium(IV) structures, which are isolated and stabilize gold nanoparticles, possibly minimizing sintering effects during synthesis. The size of the gold particles depends on the pre-treatment of the titanium–silica support before gold deposition, with larger titanium structures hosting larger gold particles. Acetic acid yield over the titanium–silica-supported gold systems improved by about 1.6 times, compared to pure titania-supported gold. The high activity of those catalysts suggests that bulk, crystalline titania is not required for the reaction, encouraging the use of mixed supports to combine their benefits. Those support systems, besides improving selectivity, offer high surface area and a low-cost filler material, which brings ethanol oxidation one step further to the industry. Additionally, the low loading of titanium permits studying the reaction mechanisms on the gold–titanium interface with bulk characterization techniques.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
American Chemical Society
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Titanium-Anchored Gold on Silica for Enhanced Catalytic Activity in Aqueous Ethanol Oxidation
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2020-12-09
ethz.journal.title
Industrial & Engineering Chemistry Research
ethz.journal.volume
60
en_US
ethz.journal.issue
4
en_US
ethz.journal.abbreviated
Ind. Eng. Chem. Res.
ethz.pages.start
1564
en_US
ethz.pages.end
1575
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Selective Oxidation of ethanol on modified supported Au catalysts: from fundamental understanding to improved performance
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Washington, DC
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.grant.agreementno
158188
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Projekte MINT
ethz.date.deposited
2021-01-04T17:50:20Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-03-26T11:35:02Z
ethz.rosetta.lastUpdated
2023-02-06T21:38:43Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Titanium-Anchored%20Gold%20on%20Silica%20for%20Enhanced%20Catalytic%20Activity%20in%20Aqueous%20Ethanol%20Oxidation&rft.jtitle=Industrial%20&%20Engineering%20Chemistry%20Research&rft.date=2021-02-03&rft.volume=60&rft.issue=4&rft.spage=1564&rft.epage=1575&rft.issn=1520-5045&0888-5885&rft.au=Mostrou-Moser,%20Sotiria&Newton,%20Mark%20A.&Tarcevski,%20Andreas&Nagl,%20Andreas&F%C3%B6ttinger,%20Karin&rft.genre=article&rft_id=info:doi/10.1021/acs.iecr.0c02939&
 Search print copy at ETH Library

Files in this item

Thumbnail

Publication type

Show simple item record