期刊
ACS APPLIED MATERIALS & INTERFACES
卷 5, 期 18, 页码 8833-8840出版社
AMER CHEMICAL SOC
DOI: 10.1021/am403836f
关键词
mesoporous films; metal-polymer nanocomposites; polymer brushes; gold catalysis; ammonia oxidation; nanocatalysis
资金
- Deutsche Akademischer Austauschdienst
- CONICET
- Max Planck Society
- ABTLuS
- UNSAM
- ANPCyT [PICT 2010-0026, 2008-1848, PICT-PRH 163/08]
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.
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