title: Gaseous NH3 Confers Porous Pt Nanodendrites Assisted by Halides.
abstract: 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.
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China.
authors.forename: Shuanglong
authors.initials: S
authors.lastname: Lu
authors.affiliation: State 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.
authors.forename: Kamel
authors.initials: K
authors.lastname: Eid
authors.affiliation: School for Radiological and Interdisciplinary Sciences (RADX) &Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, P. R. China.
authors.forename: Weifeng
authors.initials: W
authors.lastname: Li
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China.
authors.forename: Xueqin
authors.initials: X
authors.lastname: Cao
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Pan
authors.affiliation: Analysis and Testing Center, Soochow University, Suzhou 215123, P. R. China.
authors.forename: Jun
authors.initials: J
authors.lastname: Guo
authors.affiliation: College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
authors.forename: Liang
authors.initials: L
authors.lastname: Wang
authors.affiliation: College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
authors.forename: Hongjing
authors.initials: H
authors.lastname: Wang
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Gu