@article{Li2015, 
author = {Yujing Li and Fanxin Quan and Enbo Zhu and Lin Chen and Yu Huang and Changfeng Chen},
title = {PtxCuy nanocrystals with hexa-pod morphology and their electrocatalytic performances towards oxygen reduction reaction},
year = {2015},
journal = {Nano Research},
volume = {8},
number = {10},
pages = {3342-3352},
keywords = {oxygen reduction reaction, bimetallic alloy, morphology control, fuel cell electro-catalysis, high-index},
url = {https://www.sciopen.com/article/10.1007/s12274-015-0834-7},
doi = {10.1007/s12274-015-0834-7},
abstract = {Bimetallic PtxCuy nanocrystals (NCs) with well-defined hexa-pod morphology were synthesized via a wet chemistry approach. The as-synthesized convex NCs with dimensions of around 20 nm show exposed low-index (111) facets on the seeds and various high-index facets on the pods. The growth mechanism involved preferred growth along the < 100 > crystallographic direction on cuboctahedral seeds. The synthetic protocol could be applied to the synthesis of PtxCuy NCs with various Cu/Pt ratios. The electro-catalytic activity of the hexa-pod PtxCuy NCs supported on carbon black towards the oxygen reduction reaction (ORR) was studied. The hexa-pod PtCu2/C catalysts exhibit the highest specific activity (3.7 mA/cmPt2) and mass activity (2.4 A/mgPt) reported to date for PtxCuy. Comparison with other morphological forms of PtxCuy indicated that the enhanced activity originated from morphological factors. The existence of high-index facets as well as abundant edges and steps on the pods could reasonably explain the enhanced catalytic activity. The hexa-pod PtxCuy/C catalysts also show high morphological stability and activity after accelerated durability tests. The as-synthesized hexa-pod PtxCuy NCs have high potential as cathode electro-catalysts for proton exchange membrane fuel cells.}
}