In situ synthesis of platinum nanocatalysts on a microstructured paperlike matrix for the catalytic purification of exhaust gases.
The successful in situ synthesis of platinum nanoparticles (PtNPs) on a microstructured paperlike matrix, comprising ceramic fibers as main framework and zinc oxide whiskers as selective support for the PtNPs, is reported. The as-prepared hybrid material (PtNPs@ZnO "paper") resembles ordinary paper products because it is flexible, lightweight, and easy to handle. In the catalytic reduction of nitrogen oxide (NO(x)) with propene for exhaust gas purification, the PtNPs@ZnO paper demonstrates a high catalytic performance at a low reaction temperature, with one-third the dosage of precious platinum compared to conventional platinum-loaded honeycomb catalysts. These results imply that the combination of easily synthesized PtNPs and a unique fiber-network microstructure can provide excellent performances, promoting the effective transport of heat and reactants to the active sites of the platinum nanocatalysts. Thus, PtNPs@ZnO materials with paperlike practical aspects are promising catalytic materials for efficient NO(x) gas purification.
Koga
Hirotaka
H
Department of Forest and Forest Products Sciences, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan.
Umemura
Yuuka
Y
Tomoda
Akihiko
A
Suzuki
Ryo
R
Kitaoka
Takuya
T
D002384:Catalysis; D002516:Ceramics / Q000737:chemistry; D005740:Gases / Q000737:chemistry* / Q000302:isolation & purification*; D053768:Metal Nanoparticles / Q000737:chemistry*; D009589:Nitrogen Oxides / Q000737:chemistry / Q000302:isolation & purification; D010084:Oxidation-Reduction; D010209:Paper; D056951:Photoelectron Spectroscopy; D010984:Platinum / Q000737:chemistry*; D001335:Vehicle Emissions; D015034:Zinc Oxide / Q000737:chemistry
D005740:Gases; D009589:Nitrogen Oxides; D001335:Vehicle Emissions; D010984:Platinum; D015034:Zinc Oxide