Controlled Anisotropic Growth of Co‐Fe‐P from Co‐Fe‐O Nanoparticles |
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| Authors: | Adriana Mendoza‐Garcia Dr Huiyuan Zhu Prof Yongsheng Yu Dr Qing Li Dr Lin Zhou Dr Dong Su Prof Matthew J Kramer Prof Shouheng Sun |
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| Institution: | 1. Department of Chemistry, Brown University, Providence, RI 02912 (USA);2. Present address: Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (USA);3. Present address: School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, Heilongjiang 150001 (China);4. The Ames Laboratory, US Department of Energy, Iowa State University, Ames, IA 50011 (USA);5. Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973 (USA) |
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| 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 (Co0.54Fe0.46)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. |
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| Keywords: | cobalt– iron phosphides metal oxide phosphidation nanorods oxygen evolution reaction |
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