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Synthesis of Monodispere Au@Co3O4 Core-Shell Nanocrystals and Their Enhanced Catalytic Activity for Oxygen Evolution Reaction

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Abstract

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Novel OER catalysts – monodisperse Au@Co3O4 core-shell nanocrystals – have been prepared by synthesizing Au nanocrystals, followed by deposition of Co shells and their conversion to Co3O4 shells. Owing to the synergistic effect, Au@Co3O4 nanocrystals have an OER activity 7 times as high as a Au and Co3O4 nanocrystals mixture or Co3O4 nanocrystals alone, and 55 times as high as Au nanocrystals alone.

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