Amorphous/Crystalline Nife Ldh Hierarchical Nanostructure for Large-Current-Density Electrocatalytic Water Oxidation

31 Pages Posted: 17 Apr 2024

See all articles by Yilong Li

Yilong Li

North China Electric Power University

Mingzhe Li

North China Electric Power University

Chenxuan Xie

North China Electric Power University

Ziyu Ling

North China Electric Power University

Yuzhen Lv

North China Electric Power University

Kepi Chen

North China Electric Power University - School of Energy, Power and Mechanical Engineering

Abstract

Amorphous structure shows more catalytic active sites but poor conductivity towards oxygen evolution reaction (OER). Herein, we fabricated a novel three-dimensional (3D) self-supported NiFe layered double hydroxides (LDH) catalytic material with amorphous/ crystalline interface, aiming to obtain both excellent catalytic activity and conductivity. This homogeneous hierarchical structure exhibits a high catalytic activity and robustness, giving the industrially required current density of 1000 mA cm-2 at an ultralow overpotential of 359.8 mV with 240-hour stability in 1M KOH. In-situ electrochemical tests reveal that the amorphous/crystalline interface boosts the intermediates evolution and OER kinetics, which might be ascribed to considerable active sites and fast charge transfer. Moreover, the 3D structure has unique superhydrophilicity and superaerophobicity, which can further accelerate the electrolyte penetration, facilitate the bubbles desorption from the electrode, enhance mass transport, and thus improve OER performance at large current densities. This work provides a feasible way to develop high-performance electrocatalytic material via constructing homogeneous amorphous/crystalline interface.

Keywords: Amorphous/crystalline interface, NiFe LDH, oxygen evolution reaction, Large-current-density electrolysis, Catalytic activity

Suggested Citation

Li, Yilong and Li, Mingzhe and Xie, Chenxuan and Ling, Ziyu and Lv, Yuzhen and Chen, Kepi, Amorphous/Crystalline Nife Ldh Hierarchical Nanostructure for Large-Current-Density Electrocatalytic Water Oxidation. Available at SSRN: https://ssrn.com/abstract=4797088 or http://dx.doi.org/10.2139/ssrn.4797088

Yilong Li

North China Electric Power University ( email )

School of Business Administration,NCEPU
No. 2 Beinong Road, Changqing District
Beijing, 102206
China

Mingzhe Li

North China Electric Power University ( email )

School of Business Administration,NCEPU
No. 2 Beinong Road, Changqing District
Beijing, 102206
China

Chenxuan Xie

North China Electric Power University ( email )

School of Business Administration,NCEPU
No. 2 Beinong Road, Changqing District
Beijing, 102206
China

Ziyu Ling

North China Electric Power University ( email )

School of Business Administration,NCEPU
No. 2 Beinong Road, Changqing District
Beijing, 102206
China

Yuzhen Lv (Contact Author)

North China Electric Power University ( email )

School of Business Administration,NCEPU
No. 2 Beinong Road, Changqing District
Beijing, 102206
China

Kepi Chen

North China Electric Power University - School of Energy, Power and Mechanical Engineering ( email )

Beijing, 102206
China

Do you have a job opening that you would like to promote on SSRN?

Paper statistics

Downloads
5
Abstract Views
46
PlumX Metrics