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Construction of Ni‐Co‐Fe Hydr(oxy)oxide@Ni‐Co Layered Double Hydroxide Yolk‐Shelled Microrods for Enhanced Oxygen Evolution by Qian Niu; Min Yang; Deyan Luan; Nian Wu Li; Le Yu; Xiong Wen (David) Lou is a Chemistry article available to read on EtoBox.

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## Abstract The exploration of earth‐abundant and efficient electrocatalysts toward the oxygen evolution reaction (OER) is critical for sustainable energy storage and conversion devices. In this work, we report a self‐engaged strategy to fabricate a yolk‐shelled OER electrocatalyst. Starting with a metal–organic framework, Co‐Fe layered double hydroxide (LDH)@zeolitic imidazolate framework‐67 (ZIF‐67) yolk‐shelled structures are formed in one step. Afterwards, these ZIF‐67 building blocks are transformed into Ni‐Co LDH nanocages to form the Ni‐Co‐Fe hydr(oxy)oxide@Ni‐Co LDH yolk‐shelled microrods (NiCoFe‐HO@NiCo‐LDH YSMRs) through an ion‐exchange reaction. Owing to the structural and compositional merits, the NiCoFe‐HO@NiCo‐LDH YSMR electrocatalyst exhibits an overpotential of 278 mV to reach the current density of 10 mA cm^−2^, a small Tafel slope of 49.7 mV dec^−1^, and good stability in alkaline media.

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Author

Qian Niu; Min Yang; Deyan Luan; Nian Wu Li; Le Yu; Xiong Wen (David) Lou

Publisher

Wiley

Published

2022

Language

EN

Field

Chemistry (Physical Sciences)