Jiang Bo, Li Cuiling, Malgras Victor, Imura Masataka, Tominaka Satoshi, Yamauchi Yusuke
World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA) , National Institute for Materials Science (NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan . Email:
Faculty of Science and Engineering , Waseda University , 3-4-1 Okubo, Shinjuku , Tokyo 169-8555 , Japan.
Chem Sci. 2016 Feb 1;7(2):1575-1581. doi: 10.1039/c5sc03779d. Epub 2015 Dec 8.
A novel strategy for large-scale synthesis of shape- and size-controlled mesoporous Pt nanospheres (MPNs) through a slow reduction reaction in the presence of surfactant is reported here for the first time. The slow reduction reaction exclusively results in well-defined mesoporous architectures distinctly different from the dendritic constructions reported previously. More importantly, abundant catalytically active sites are created on the highly accessible mesoporous surfaces by the selective adsorption of bromide ions. The MPNs prepared by using the new synthetic route not only show superior electrochemical performance toward methanol oxidation reaction and oxygen reduction reaction, but also exhibit extremely high structural thermostability, which makes them promising catalysts for industrial applications.
本文首次报道了一种通过在表面活性剂存在下进行缓慢还原反应来大规模合成形状和尺寸可控的介孔铂纳米球（MPNs）的新策略。缓慢还原反应仅产生定义明确的介孔结构，与先前报道的树枝状结构明显不同。更重要的是，通过溴离子的选择性吸附，在高度可及的介孔表面上产生了大量催化活性位点。采用新合成路线制备的MPNs不仅对甲醇氧化反应和氧还原反应表现出优异的电化学性能，而且还具有极高的结构热稳定性，这使其成为工业应用中有前景的催化剂。
