Construction of Ni-Co-Fe Hydr(oxy)oxide@Ni-Co Layered Double Hydroxide Yolk-Shelled Microrods for Enhanced Oxygen Evolution

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

doi:10.1002/anie.202213049

Construction of Ni-Co-Fe Hydr(oxy)oxide@Ni-Co Layered Double Hydroxide Yolk-Shelled Microrods for Enhanced Oxygen Evolution

Angew Chem Int Ed Engl. 2022 Dec 5;61(49):e202213049. doi: 10.1002/anie.202213049. Epub 2022 Nov 9.

Authors

Qian Niu¹, Min Yang¹, Deyan Luan², Nian Wu Li¹, Le Yu¹, Xiong Wen David Lou²

Affiliations

¹ State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
² School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.

PMID: 36218244
DOI: 10.1002/anie.202213049

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.

Keywords: Complex Hollow; Hydr(oxy)oxide; Metal-Organic Frameworks; Oxygen Evolution Reaction.

Abstract

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