Heterogeneous catalytic activity of platinum nanoparticles hosted in mesoporous silica thin films modified with polyelectrolyte brushes
Platinum nanoparticles of 3 nm diameter were included in mesoporous silica thin films by controlling the mesopore surface charge with a short polymer brush. This metal-polymer-mesopore nanocomposite presents high catalytic activity toward ammonia oxidation at low temperatures with 4.5% weight platin...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_19448244_v5_n18_p8833_Rafti |
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todo:paper_19448244_v5_n18_p8833_Rafti2023-10-03T16:37:00Z Heterogeneous catalytic activity of platinum nanoparticles hosted in mesoporous silica thin films modified with polyelectrolyte brushes Rafti, M. Brunsen, A. Fuertes, M.C. Azzaroni, O. Soler-Illia, G.J.A.A. ammonia oxidation gold catalysis mesoporous films metal-polymer nanocomposites nanocatalysis polymer brushes Ammonia oxidation Gold catalysis Mesoporous films Metal-polymer nanocomposites Nanocatalysis Polymer brushes Ammonia Catalyst activity Dendrimers Nanocomposites Nanoparticles Nitrogen oxides Platinum Platinum nanoparticles of 3 nm diameter were included in mesoporous silica thin films by controlling the mesopore surface charge with a short polymer brush. This metal-polymer-mesopore nanocomposite presents high catalytic activity toward ammonia oxidation at low temperatures with 4.5% weight platinum loading. An anomalous partial selectivity toward nitrous oxide is observed for the first time, which can be traced back to the synergy of the particles and modified surface. This effect opens a path toward the design of nanocomposite catalysts with highly controlled environments, in which the size- and function-controlled cavities can be tuned in order to lower the reaction barriers. © 2013 American Chemical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_19448244_v5_n18_p8833_Rafti |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
ammonia oxidation gold catalysis mesoporous films metal-polymer nanocomposites nanocatalysis polymer brushes Ammonia oxidation Gold catalysis Mesoporous films Metal-polymer nanocomposites Nanocatalysis Polymer brushes Ammonia Catalyst activity Dendrimers Nanocomposites Nanoparticles Nitrogen oxides Platinum |
| spellingShingle |
ammonia oxidation gold catalysis mesoporous films metal-polymer nanocomposites nanocatalysis polymer brushes Ammonia oxidation Gold catalysis Mesoporous films Metal-polymer nanocomposites Nanocatalysis Polymer brushes Ammonia Catalyst activity Dendrimers Nanocomposites Nanoparticles Nitrogen oxides Platinum Rafti, M. Brunsen, A. Fuertes, M.C. Azzaroni, O. Soler-Illia, G.J.A.A. Heterogeneous catalytic activity of platinum nanoparticles hosted in mesoporous silica thin films modified with polyelectrolyte brushes |
| topic_facet |
ammonia oxidation gold catalysis mesoporous films metal-polymer nanocomposites nanocatalysis polymer brushes Ammonia oxidation Gold catalysis Mesoporous films Metal-polymer nanocomposites Nanocatalysis Polymer brushes Ammonia Catalyst activity Dendrimers Nanocomposites Nanoparticles Nitrogen oxides Platinum |
| description |
Platinum nanoparticles of 3 nm diameter were included in mesoporous silica thin films by controlling the mesopore surface charge with a short polymer brush. This metal-polymer-mesopore nanocomposite presents high catalytic activity toward ammonia oxidation at low temperatures with 4.5% weight platinum loading. An anomalous partial selectivity toward nitrous oxide is observed for the first time, which can be traced back to the synergy of the particles and modified surface. This effect opens a path toward the design of nanocomposite catalysts with highly controlled environments, in which the size- and function-controlled cavities can be tuned in order to lower the reaction barriers. © 2013 American Chemical Society. |
| format |
JOUR |
| author |
Rafti, M. Brunsen, A. Fuertes, M.C. Azzaroni, O. Soler-Illia, G.J.A.A. |
| author_facet |
Rafti, M. Brunsen, A. Fuertes, M.C. Azzaroni, O. Soler-Illia, G.J.A.A. |
| author_sort |
Rafti, M. |
| title |
Heterogeneous catalytic activity of platinum nanoparticles hosted in mesoporous silica thin films modified with polyelectrolyte brushes |
| title_short |
Heterogeneous catalytic activity of platinum nanoparticles hosted in mesoporous silica thin films modified with polyelectrolyte brushes |
| title_full |
Heterogeneous catalytic activity of platinum nanoparticles hosted in mesoporous silica thin films modified with polyelectrolyte brushes |
| title_fullStr |
Heterogeneous catalytic activity of platinum nanoparticles hosted in mesoporous silica thin films modified with polyelectrolyte brushes |
| title_full_unstemmed |
Heterogeneous catalytic activity of platinum nanoparticles hosted in mesoporous silica thin films modified with polyelectrolyte brushes |
| title_sort |
heterogeneous catalytic activity of platinum nanoparticles hosted in mesoporous silica thin films modified with polyelectrolyte brushes |
| url |
http://hdl.handle.net/20.500.12110/paper_19448244_v5_n18_p8833_Rafti |
| work_keys_str_mv |
AT raftim heterogeneouscatalyticactivityofplatinumnanoparticleshostedinmesoporoussilicathinfilmsmodifiedwithpolyelectrolytebrushes AT brunsena heterogeneouscatalyticactivityofplatinumnanoparticleshostedinmesoporoussilicathinfilmsmodifiedwithpolyelectrolytebrushes AT fuertesmc heterogeneouscatalyticactivityofplatinumnanoparticleshostedinmesoporoussilicathinfilmsmodifiedwithpolyelectrolytebrushes AT azzaronio heterogeneouscatalyticactivityofplatinumnanoparticleshostedinmesoporoussilicathinfilmsmodifiedwithpolyelectrolytebrushes AT solerilliagjaa heterogeneouscatalyticactivityofplatinumnanoparticleshostedinmesoporoussilicathinfilmsmodifiedwithpolyelectrolytebrushes |
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1807323315128238080 |