Open AccessGaseous NH3 Confers Porous Pt Nanodendrites Assisted by Halides
Author(s) -
Shuanglong Lu,
Kamel Eid,
Weifeng Li,
Xueqin Cao,
Yue Pan,
Jun Guo,
Liang Wang,
Hongjing Wang,
Hongwei Gu
Publication year - 2016
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/srep26196
Subject(s) - halide , nanocrystal , catalysis , reagent , porosity , chemical engineering , materials science , platinum , metal , chemistry , nanotechnology , combinatorial chemistry , inorganic chemistry , organic chemistry , engineering
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 NH 3 gas and halides (F − , Cl − , Br − ). The NH 3 gas plays critical roles on tuning the morphology. Previously, H 2 and CO gas are reported to assist the shape control of metallic nanocrystals. This is the first demonstration that NH 3 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 NH 4 F 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.