Au-CoOx hybrid nanoparticles have attracted a great deal of interest for oxygen evolution reaction (OER) catalysis in electrochemical water splitting due to their enhanced catalytic activity. However, the development of these electrocatalysts is limited by the lack of successful synthesis of Au-CoOx core-shell nanoparticles. Herein, we designed Au-Co branched nanoparticles by using an organic-phase seed mediated approach. We found that the 1D branch morphology and high crystallinity of the branched nanoparticles increase the charge transfer and improve the catalytic active sites for the oxygen evolution reaction. Importantly, these Au-Co branched nanoparticles show superior charge transfer and catalytic activity toward oxygen evolution reaction. This work opens a new avenue towards next-generation Au-Co based electrocatalysts for the oxygen evolution reaction.

Effects of branch morphology and crystallinity of Au-Co nanoparticles for enhanced oxygen evolution catalysis

2019 Spring National Meeting

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