Li Cuiling, Imura Masataka, 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).
Chemistry. 2014 Mar 17;20(12):3277-82. doi: 10.1002/chem.201303250. Epub 2014 Feb 24.
Mesoporous Pt skins on Co nanochains are successfully synthesized by a displacement reaction between Pt species and a Co support with the assistance of surfactant micelles. The assembly of surfactant micelles on Co nanochains plays a key role in the formation of mesoporous Pt layers. The evolution of the mesoporous Pt layers is carefully studied at different time intervals. As the reaction time increases, the mesoporous Pt layers become thicker, and well-defined mesoporous structures gradually develop. The obtained mesoporous Pt skin exhibits high activity and superior CO tolerance in the electro-oxidation reaction of methanol. The mesoporous Pt skin also shows very high durability, and only a 20.2 % loss of the Pt electrochemical surface area is found even after a harsh durability test.
通过铂物种与钴载体在表面活性剂胶束的辅助下发生置换反应，成功合成了钴纳米链上的介孔铂皮。表面活性剂胶束在钴纳米链上的组装在介孔铂层的形成中起关键作用。在不同时间间隔仔细研究了介孔铂层的演变。随着反应时间的增加，介孔铂层变厚，明确的介孔结构逐渐形成。所获得的介孔铂皮在甲醇的电氧化反应中表现出高活性和优异的抗一氧化碳耐受性。介孔铂皮还显示出非常高的耐久性，即使经过苛刻的耐久性测试，铂电化学表面积仅损失20.2%。
