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.
ChemSusChem. 2010 May 25;3(5):604-8. doi: 10.1002/cssc.200900277.
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.
成功地在微结构化的纸状基质上原位合成了铂纳米粒子（PtNPs），该基质由陶瓷纤维作为主要骨架，氧化锌晶须作为 PtNPs 的选择性支撑。所制备的混合材料（PtNPs@ZnO“纸”）类似于普通的纸制品，因为它具有柔韧性、轻质性和易于处理的特点。在用于废气净化的丙烯催化还原氮氧化物（NO(x)）反应中，PtNPs@ZnO 纸在低温下表现出高催化性能，与传统的负载铂蜂窝催化剂相比，铂的用量减少了三分之一。这些结果表明，易于合成的 PtNPs 与独特的纤维网络微观结构的结合可以提供优异的性能，促进热和反应物有效地输送到铂纳米催化剂的活性位。因此，具有纸状实际方面的 PtNPs@ZnO 材料是高效 NO(x)气体净化的有前途的催化材料。
