Boosting Activity and Stability of Electrodeposited Amorphous Ce‐Doped NiFe‐Based Catalyst for Electrochemical Water Oxidation. (22nd June 2022)

• Record Type: Journal Article
• Authors: Liu, Jiayi; Liu, Yang; Mu, Xulin; Jang, Haeseong; Lei, Zhanwu; Jiao, Shuhong; Yan, Pengfei; Kim, Min Gyu; Cao, Ruiguo
• Is Part Of: Advanced functional materials. Volume 32:Number 35(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-06-22
• Subjects: amorphous structures -- Ce‐dopants -- nickel‐iron based electrocatalysts -- oxygen evolution reaction -- water splitting; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202204086
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: NiFe‐based hydroxides are considered as promising nonprecious catalysts for water oxidation due to their low cost and easy preparation. However, the rational design of NiFe‐based electrocatalysts remains a great challenge to address the sluggish reaction kinetics and severe deactivation problems for oxygen evolution reaction (OER). Here, the authors report a facile approach to fabricate an amorphous Ce‐doped NiFe hydroxide catalyst, which enables high activity and outstanding stability toward OER in alkaline media. The overpotential of electrodeposited amorphous Ce‐doped NiFe is only 195 mV at 10 mA cm −2 . Meanwhile, the durability of the amorphous Ce‐doped NiFe is maintained for 300 h at 100 mA cm −2 . The comprehensive characterization results reveal that the improved electrochemical performance of the amorphous Ce‐doped NiFe catalyst is originated from the favorable oxidation transition of active sites enabled by Ce‐doping. It is a very good strategy to introduce highly oxidized state ions to regulate the NiFe‐based catalyst to improve the catalytic activity and stability. Abstract : The amorphous Ce‐doped NiFe‐based catalysts are developed by using a facile electrodeposition approach, which shows superior activity and excellent durability for water oxidation in alkaline media.