One-pot Synthesis of Pt Catalysts Supported on Al-modified TiO2
<p>A facile, industrially viable, one-pot synthesis of 0.5-8 wt% Pt supported on 22 mol% Al-modified ana-tase with high surface area and thermal stability is presented. Four pathways were studied to deter-mine the effects of support properties on catalyst dispersion, and the highest dispersion...
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Diponegoro University
2014-10-01
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doaj-df97514d91c345a1afc018df77da76132020-11-24T23:23:05ZengDiponegoro UniversityBulletin of Chemical Reaction Engineering & Catalysis1978-29932014-10-019315616710.9767/bcrec.9.3.6734.156-1676071One-pot Synthesis of Pt Catalysts Supported on Al-modified TiO2Rebecca Olsen0Calvin Bartholomew1Ben Enfield2Brian F. Woodfield3Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602,Department of Chemical Engineering, Brigham Young University, Provo, UT 84602,Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602,Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602,<p>A facile, industrially viable, one-pot synthesis of 0.5-8 wt% Pt supported on 22 mol% Al-modified ana-tase with high surface area and thermal stability is presented. Four pathways were studied to deter-mine the effects of support properties on catalyst dispersion, and the highest dispersions were observed for high surface area materials containing 5-coordinate anatase. Systematic study of preparation vari-ables shows that low drying temperatures, slow calcination ramp rates, and slow reduction ramp rates further increased Pt dispersion and resulted in a more uniform Pt size distribution. Pt dispersions as high as 54% have been obtained using the one-pot method and 59% for Pt catalysts synthesized by dry impregnation. Statistically designed studies are needed to more completely determine the effects of synthesis variables and to optimize the dispersion and reduction of Pt supported on Al-modified ana-tase. Results presented in this paper show that this one-pot method and dry impregnation method us-ing our Al-modified anatase support are promising syntheses of highly dispersed Pt supported on stabi-lized titania. Our results demonstrate that the alumina-stabilized anatase support is superior to other anatase supports for (1) obtaining high Pt dispersions, i.e. more efficiently utilizing this expensive pre-cious metal, and (2) processes in which thermal stability is important due to its constant phase and pore structures at high temperatures. © 2014 BCREC UNDIP. All rights reserved</p><p><em>Received: 20th April 2014; Revised: 14th May 2014; Accepted: 10th June 2014</em></p><p><strong>How to Cite</strong>: Olsen, R.E., Bartholomew,C.H., Enfield, D.B., Woodfield, B.F. (2014). One-pot Synthesis of Pt Catalysts Supported on Al-modified TiO2. <em>Bulletin of Chemical Reaction Engineering & Catalysis</em>, 9 (3): 156-167. (doi:10.9767/bcrec.9.3.6734.156-167)</p><p><strong>Permalink/DOI</strong>: <a href="http://dx.doi.org/10.9767/bcrec.9.3.6734.156-167">http://dx.doi.org/10.9767/bcrec.9.3.6734.156-167</a></p>http://ejournal.undip.ac.id/index.php/bcrec/article/view/6734anatasehigh surface areaSMSI effectsupported Pt-catalystone-pot synthesis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Rebecca Olsen Calvin Bartholomew Ben Enfield Brian F. Woodfield |
spellingShingle |
Rebecca Olsen Calvin Bartholomew Ben Enfield Brian F. Woodfield One-pot Synthesis of Pt Catalysts Supported on Al-modified TiO2 Bulletin of Chemical Reaction Engineering & Catalysis anatase high surface area SMSI effect supported Pt-catalyst one-pot synthesis |
author_facet |
Rebecca Olsen Calvin Bartholomew Ben Enfield Brian F. Woodfield |
author_sort |
Rebecca Olsen |
title |
One-pot Synthesis of Pt Catalysts Supported on Al-modified TiO2 |
title_short |
One-pot Synthesis of Pt Catalysts Supported on Al-modified TiO2 |
title_full |
One-pot Synthesis of Pt Catalysts Supported on Al-modified TiO2 |
title_fullStr |
One-pot Synthesis of Pt Catalysts Supported on Al-modified TiO2 |
title_full_unstemmed |
One-pot Synthesis of Pt Catalysts Supported on Al-modified TiO2 |
title_sort |
one-pot synthesis of pt catalysts supported on al-modified tio2 |
publisher |
Diponegoro University |
series |
Bulletin of Chemical Reaction Engineering & Catalysis |
issn |
1978-2993 |
publishDate |
2014-10-01 |
description |
<p>A facile, industrially viable, one-pot synthesis of 0.5-8 wt% Pt supported on 22 mol% Al-modified ana-tase with high surface area and thermal stability is presented. Four pathways were studied to deter-mine the effects of support properties on catalyst dispersion, and the highest dispersions were observed for high surface area materials containing 5-coordinate anatase. Systematic study of preparation vari-ables shows that low drying temperatures, slow calcination ramp rates, and slow reduction ramp rates further increased Pt dispersion and resulted in a more uniform Pt size distribution. Pt dispersions as high as 54% have been obtained using the one-pot method and 59% for Pt catalysts synthesized by dry impregnation. Statistically designed studies are needed to more completely determine the effects of synthesis variables and to optimize the dispersion and reduction of Pt supported on Al-modified ana-tase. Results presented in this paper show that this one-pot method and dry impregnation method us-ing our Al-modified anatase support are promising syntheses of highly dispersed Pt supported on stabi-lized titania. Our results demonstrate that the alumina-stabilized anatase support is superior to other anatase supports for (1) obtaining high Pt dispersions, i.e. more efficiently utilizing this expensive pre-cious metal, and (2) processes in which thermal stability is important due to its constant phase and pore structures at high temperatures. © 2014 BCREC UNDIP. All rights reserved</p><p><em>Received: 20th April 2014; Revised: 14th May 2014; Accepted: 10th June 2014</em></p><p><strong>How to Cite</strong>: Olsen, R.E., Bartholomew,C.H., Enfield, D.B., Woodfield, B.F. (2014). One-pot Synthesis of Pt Catalysts Supported on Al-modified TiO2. <em>Bulletin of Chemical Reaction Engineering & Catalysis</em>, 9 (3): 156-167. (doi:10.9767/bcrec.9.3.6734.156-167)</p><p><strong>Permalink/DOI</strong>: <a href="http://dx.doi.org/10.9767/bcrec.9.3.6734.156-167">http://dx.doi.org/10.9767/bcrec.9.3.6734.156-167</a></p> |
topic |
anatase high surface area SMSI effect supported Pt-catalyst one-pot synthesis |
url |
http://ejournal.undip.ac.id/index.php/bcrec/article/view/6734 |
work_keys_str_mv |
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