Abstract

Developing a hierarchical heterostructure is a feasible strategy to explore high-efficiency electrocatalysts for oxygen evolution reaction (OER). In this work, a hierarchical heterostructure was built by interface engineering between NiCo-LDH nanosheets and CoP nanowires. Their electronic structure is affected each other by a strong interaction due to the formed hierarchical heterostructure, regulating the intrinsic activity. CoP with a thin and long nanowire structure provides a large electrochemical active area. With these advantages, the prepared NiCo-LDH nanosheets/CoP nanowires/Ni foam shows an enhanced oxygen evolution reaction (OER) performance with an overpotential of 253 mV at 10 mA·cm−2 in an alkaline environment (1 M KOH). This paper provides a potential strategy for high-efficiency oxygen evolution reaction (OER).

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