Metal Hydroxide-Organic Framework Mediated Structural Reengineering Enables Efficient NiFe Interaction for Robust Water Oxidation

Hanxiao Liao; Kejun Chen; Xiaorong He; Jiaxin Tong; Xuanzhi Liu; Pengfei Tan; Xueyi Guo; Jun Pan

doi:10.1021/acs.nanolett.4c04815

Metal Hydroxide-Organic Framework Mediated Structural Reengineering Enables Efficient NiFe Interaction for Robust Water Oxidation

Nano Lett. 2024 Nov 20. doi: 10.1021/acs.nanolett.4c04815. Online ahead of print.

Authors

Hanxiao Liao^{1

2}, Kejun Chen³, Xiaorong He², Jiaxin Tong², Xuanzhi Liu², Pengfei Tan², Xueyi Guo¹, Jun Pan²

Affiliations

¹ School of Metallurgy and Environment, Central South University, Changsha 410083, P. R. China.
² State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, P. R. China.
³ College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410114, P. R. China.

PMID: 39565186
DOI: 10.1021/acs.nanolett.4c04815

Abstract

NiFe layered double hydroxide (NiFe LDH) derived oxyhydroxides are promising electrocatalysts for the alkaline oxygen evolution reaction (OER). However, NiFe LDH with a stable metal-oxygen-metal (M-O-M) structure suffers from inadequate NiFe interaction, leading to undesirable activity and stability. Herein, we develop a NiFe hydroxide-organic framework (NiFe HOF) via modification of NiFe LDH with an organic linker to break the structural constraint of M-O-M and thus boost the OER. NiFe HOF with reconfigurable metal sites facilitates structural reengineering under the OER condition to form abundant NiFe interaction and prolonged M-O bonds, stimulating lattice oxygen mechanism. Therefore, NiFe HOF shows a distinctly decreased overpotential at 50 mA cm^-2, which is 68 mV lower than that of NiFe LDH. The anion exchange membrane electrolyzer using NiFe HOF as anode electrode displays ultralong stability exceeding 1050 h at 1 A cm^-2 with a low attenuation of 0.16 mV h^-1.

Keywords: Lattice oxygen; Metal hydroxide−organic framework; NiFe interaction; NiFe layered double hydroxide; Oxygen evolution reaction.