One-pot synthesis of NiFe nanoarrays under an external magnetic field as an efficient oxygen evolution reaction catalyst

Yujie Miao; Qiuping Huang; Dan Wen; Dongling Xie; Bo Huang; Dunmin Lin; Chenggang Xu; Wen Zeng; Fengyu Xie

doi:10.1039/d2ra07666g

One-pot synthesis of NiFe nanoarrays under an external magnetic field as an efficient oxygen evolution reaction catalyst

RSC Adv. 2023 Feb 1;13(7):4249-4254. doi: 10.1039/d2ra07666g. eCollection 2023 Jan 31.

Authors

Yujie Miao¹, Qiuping Huang¹, Dan Wen¹, Dongling Xie¹, Bo Huang¹, Dunmin Lin¹, Chenggang Xu¹, Wen Zeng², Fengyu Xie¹

Affiliations

¹ College of Chemistry and Materials Science, Sichuan Normal University Chengdu 610068 P. R. China xiefengyu@sicnu.edu.cn.
² School of Chemistry and Chemical Engineering, Chongqing University Chongqing 401331 P. R. China wenzeng@cqu.edu.cn.

Abstract

Designing and developing earth-abundant electrocatalysts for the oxygen evolution reaction (OER) in alkaline media is a critical element in the societal development of sustainable energy. MIL-53(Fe-Ni)/NF-2200Gs was synthesized under an external magnetic field. Such MIL-53(Fe-Ni)/NF-2200Gs show exceptionally high catalytic activity and require an overpotential of only 174 mV to drive a geometrical catalytic current density of 10 mA cm^-2 in 1.0 M KOH, superior to RuO₂ and most Fe, Ni-based electrocatalysts. Our work emphasizes the optimization of catalytic activity originating from the improvement of the magnetic properties of the catalyst, which enhances the spin polarization and tailors the d-electron structure of cations, leading to outstanding OER activity. This work would open new opportunities to design and develop transition-metal-based nanometer arrays toward efficient and stable water oxidation in alkaline media for applications.