TY - JOUR
T1 - Strategic synthesis of mesoporous Pt-on-Pd bimetallic spheres templated from a polymeric micelle assembly
AU - Li, Yunqi
AU - Li, Cuiling
AU - Bastakoti, Bishnu P
AU - Tang, Jing
AU - Jiang, Bo
AU - Kim, Jeonghun
AU - Shahabuddin, Mohammed
AU - Bando, Yoshio
AU - Kim, Jung Ho
AU - Yamauchi, Yusuke
PY - 2016/1/1
Y1 - 2016/1/1
N2 - 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.
AB - 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.
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U2 - 10.1039/c6ta02526a
DO - 10.1039/c6ta02526a
M3 - Article
SN - 2050-7488
VL - 4
SP - 9169
EP - 9176
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 23
ER -
