期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 156, 期 -, 页码 15-24出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2014.02.047
关键词
Coaxial electrospinning; Silica nanotubes; Platinum nanoparticles; NOx SCR
资金
- Spanish Ministry of Economy and Competitiveness [CTQ2012-36408]
Silica sub-microtubes loaded with platinum nanoparticles have been prepared in flexible non-woven mats using co-axial electrospinning technique. A partially gelated sol made from tetraethyl orthosilicate was used as the silica precursor, and oil was used as the sacrificial template for the hollow channel generation. Platinum has been supported on the wall of the tubes just adding the metallic precursor to the sol-gel, thus obtaining the supported catalyst by one-pot method. The silica tubes have a high aspect ratio with external/internal diameters of 400/200 nm and well-dispersed platinum nanoparticles of around 2 nm. This catalyst showed a high NO conversion with very high selectivity to N-2 at mild conditions in the presence of excess oxygen when using C3H6 as reducing agent. This relevant result reveals the potential of this technique to produce nanostructured catalysts onto easy to handle conformations. (C) 2014 Elsevier B.V. All rights reserved.
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