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

TitleControlled Anisotropic Growth of Co-Fe-P from Co-Fe-O Nanoparticles
Publication TypeJournal Article
Year of Publication2015
AuthorsMendoza-Garcia, A, Zhu, HY, Yu, YS, Li, Q, Zhou, L, Su, D, Kramer, MJ, Sun, SH
JournalAngewandte Chemie-International Edition
Date Published08
Type of ArticleArticle
ISBN Number1433-7851
Accession NumberWOS:000358987300036
Keywordscatalysts, cobalt phosphide nanoparticles, cobalt-iron phosphides, evolution reaction, hydrogen evolution reaction, iron, magnetic-properties, metal oxide phosphidation, nanorods, oxidation, oxides, oxygen, oxygen evolution, reactivity, water

A facile approach to bimetallic phosphides, Co-Fe-P, by a high-temperature (300 degrees 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)(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.

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