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Polymeric Micelle Assembly for the Smart Synthesis of Mesoporous Platinum Nanospheres with Tunable Pore Sizes
Author(s) -
Li Yunqi,
Bastakoti Bishnu Prasad,
Malgras Victor,
Li Cuiling,
Tang Jing,
Kim Jung Ho,
Yamauchi Yusuke
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201505232
Subject(s) - mesoporous material , copolymer , micelle , materials science , chemical engineering , ethylene oxide , oxide , platinum , self assembly , nanotechnology , protonation , polymer chemistry , chemistry , ion , organic chemistry , aqueous solution , catalysis , polymer , engineering , composite material , metallurgy
A facile method for the fabrication of well‐dispersed mesoporous Pt nanospheres involves the use of a polymeric micelle assembly. A core–shell–corona type triblock copolymer [poly(styrene‐ b ‐2‐vinylpyridine‐ b ‐ethylene oxide), PS‐ b ‐P2VP‐ b ‐PEO] is employed as the pore‐directing agent. Negatively charged PtCl 4 2− ions preferably interact with the protonated P2VP + blocks while the free PEO chains prevent the aggregation of the Pt nanospheres. The size of the mesopores can be finely tuned by varying the length of the PS chain. Furthermore, it is demonstrated that the metallic mesoporous nanospheres thus obtained are promising candidates for applications in electrochemistry.