Controlled Anisotropic Growth of Co-Fe-P from Co-Fe-O Nanoparticles

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‐urch...

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Bibliographic Details
Published in:Angewandte Chemie 2015-08, Vol.127 (33), p.9778-9781
Main Authors: Mendoza-Garcia, Adriana, Zhu, Huiyuan, Yu, Yongsheng, Li, Qing, Zhou, Lin, Su, Dong, Kramer, Matthew J., Sun, Shouheng
Format: Article
Language:eng ; ger
Subjects:
Anisotropy
Bimetals
Catalysis
Catalysts
Chemistry
Cobalt-Eisen-Phosphide
Evolution
Metalloxide
Nanoparticles
Nanorods
Nanostäbe
Phosphides
Phosphidierung
Sauerstoffentwicklung
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Summary: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. Anisotrope Co‐Fe‐P‐Nanostäbe und andere Objekte wurden durch kontrollierte Phosphidierung von polyedrischen oder kubischen Co‐Fe‐O‐Nanopartikeln erhalten. Die Produkte waren gute Katalysatoren der Sauerstoffentwicklung. Der Ansatz könnte zu einer allgemeinen Herstellungsmethode für Metallphosphide/phosphate für Katalyse und Energiespeicherung weiterentwickelt werden.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201503386