Shuanglong Lu1, Kamel Eid2, Weifeng Li3, Xueqin Cao1, Yue Pan1, Jun Guo4, Liang Wang5,Hongjing Wang5 & Hongwei Gu1（顾宏伟）
1College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University
2State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Jilin 130022, P. R. China,University of Chinese Academy of Sciences, Beijing 100039, P. R. China.
3School for Radiological and Interdisciplinary
Sciences (RADX) & Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education
Institutions, Soochow University, Suzhou 215123, P. R. China.
4Analysis and Testing Center, Soochow University,
Suzhou 215123, P. R. China.
5College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014,P. R. China.
Scientific Reports,2016,6:26196
Tailoring the morphology of Pt nanocrystals (NCs) is of great concern for their enhancement in catalytic activity and durability. In this article, a novel synthetic strategy is developed to selectively prepare porous dendritic Pt NCs with different structures for oxygen reduction reaction (ORR) assisted by NH3 gas and halides (F−, Cl−, Br−). The NH3 gas plays critical roles on tuning the morphology. Previously, H2 and CO gas are reported to assist the shape control of metallic nanocrystals. This is the first demonstration that NH3 gas assists the Pt anisotropic growth. The halides also play important role in the synthetic strategy to regulate the formation of Pt NCs. As-made porous dendritic Pt NCs, especially when NH4F is used as a regulating reagent, show superior catalytic activity for ORR compared with commercial Pt/C catalyst and other previously reported Pt-based NCs.
链接：//www.nature.com/articles/srep26196
