Strategic synthesis of mesoporous Pt-on-Pd bimetallic spheres templated from a polymeric micelle assembly

Authors

Yunqi Li, National Institute for Materials Science, Japan
Cuiling Li, National Institute for Materials Science, JapanFollow
Bishnu Prasad Bastakoti, National Institute for Materials Science, Japan
Jing Tang, Waseda University
Jeonghun Kim, University of WollongongFollow
Mohammed Shahabuddin, King Saud University
Yoshio Bando, Waseda University
Jung Ho Kim, University of WollongongFollow
Yusuke Yamauchi, University of WollongongFollow

RIS ID

107573

Publication Details

Li, Y., Li, C., Bastakoti, B. Prasad., Tang, J., Kim, J., Shahabuddin, M., Bando, Y., Kim, J. & Yamauchi, Y. (2016). Strategic synthesis of mesoporous Pt-on-Pd bimetallic spheres templated from a polymeric micelle assembly. Journal of Materials Chemistry A, 4 (23), 9169-9176.

Abstract

Core-shell-corona type triblock copolymer poly(styrene-b-2-vinylpyridine-b-ethylene oxide) (PS-b-P2VP-b-PEO) micelles have been selected here to direct the synthesis of mesoporous Pt-on-Pd spheres, consisting of a Pd concentrated core and a Pt shell, as established by elemental mapping. It is important to note that the size of the PS core determines the resultant size of the mesopores. A self-evaporation method has been developed to prepare swollen micelles, so as to further enlarge the pore size (∼40 nm). Compared with commercially available catalysts (e.g., Pt black or Pt, 20 wt% on carbon black), good oxygen reduction reaction performance on the mesoporous Pt-on-Pd spheres is observed, due to the exposure of the most active Pt (111) planes and the synergistic effects from Pt and Pd in the pseudo core-shell structure.