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Controlled Anisotropic Growth of Co‐Fe‐P from Co‐Fe‐O Nanoparticles
Author(s) -
MendozaGarcia Adriana,
Zhu Huiyuan,
Yu Yongsheng,
Li Qing,
Zhou Lin,
Su Dong,
Kramer Matthew J.,
Sun Shouheng
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201503386
Subject(s) - bimetallic strip , nanorod , catalysis , nanoparticle , chemical engineering , materials science , nanotechnology , chemistry , organic chemistry , engineering
A facile approach to bimetallic phosphides, Co‐Fe‐P, by a high‐temperature (300 °C) reaction between Co‐Fe‐O nanoparticles and trioctylphosphine is presented. The growth of Co‐Fe‐P from the Co‐Fe‐O is anisotropic. As a result, Co‐Fe‐P nanorods (from the polyhedral Co‐Fe‐O nanoparticles) and sea‐urchin‐like Co‐Fe‐P (from the cubic Co‐Fe‐O nanoparticles) are synthesized with both the nanorod and the sea‐urchin‐arm dimensions controlled by Co/Fe ratios. The Co‐Fe‐P structure, especially the sea‐urchin‐like (Co 0.54 Fe 0.46 ) 2 P, shows enhanced catalysis for the oxygen evolution reaction in KOH with its catalytic efficiency surpassing the commercial Ir catalyst. Our synthesis is simple and may be readily extended to the preparation of other multimetallic phosphides for important catalysis and energy storage applications.