title: Controlled Anisotropic Growth of Co-Fe-P from Co-Fe-O Nanoparticles.
abstract: 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))2P, 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.
authors.affiliation: Department of Chemistry, Brown University, Providence, RI 02912 (USA).
authors.forename: Adriana
authors.initials: A
authors.lastname: Mendoza-Garcia
authors.affiliation: Department of Chemistry, Brown University, Providence, RI 02912 (USA).|Present address: Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (USA).
authors.forename: Huiyuan
authors.initials: H
authors.lastname: Zhu
authors.affiliation: Department of Chemistry, Brown University, Providence, RI 02912 (USA).|Present address: School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, Heilongjiang 150001 (China).
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Department of Chemistry, Brown University, Providence, RI 02912 (USA).
authors.forename: Qing
authors.initials: Q
authors.lastname: Li
authors.affiliation: The Ames Laboratory, US Department of Energy, Iowa State University, Ames, IA 50011 (USA).
authors.forename: Lin
authors.initials: L
authors.lastname: Zhou
authors.affiliation: Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973 (USA).
authors.forename: Dong
authors.initials: D
authors.lastname: Su
authors.affiliation: The Ames Laboratory, US Department of Energy, Iowa State University, Ames, IA 50011 (USA).
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Kramer
authors.affiliation: Department of Chemistry, Brown University, Providence, RI 02912 (USA). ssun@brown.edu.
authors.forename: Shouheng
authors.initials: S
authors.lastname: Sun
keywords: cobalt-iron phosphides; metal oxide phosphidation; nanorods; oxygen evolution reaction