In Situ Fabrication of Nickel–Iron Oxalate Catalysts for Electrochemical Water Oxidation at High Current Densities

Babar, Pravin Tukaram; Patil, Komal; Karade, Vijay; Gour, Kuldeep; Lokhande, Abhishek; Pawar, Sambhaji; Kim, Jin Hyeok

In Situ Fabrication of Nickel–Iron Oxalate Catalysts for Electrochemical Water Oxidation at High Current Densities

Embargo End Date

2022-10-26

Type

Article

Authors

Babar, Pravin Tukaram

Patil, Komal
Karade, Vijay

Gour, Kuldeep

Lokhande, Abhishek
Pawar, Sambhaji
Kim, Jin Hyeok

KAUST Department

Advanced Membranes and Porous Materials Research Center

Online Publication Date

2021-10-26

Print Publication Date

2021-11-10

Date

2021-10-26

Submitted Date

2021-08-06

Abstract

Ni–Fe-based electrode materials are promising candidates for the oxygen evolution reaction (OER). The synergy between Fe and Ni atoms is crucial in modulating the electronic structure of the active site to enhance electrochemical performance. Herein, a simple chemical immersion technique was used to grow Ni–Fe oxalate nanowires directly on a porous nickel foam substrate. The as-prepared Ni–Fe oxalate electrode exhibited an excellent electrochemical performance of the OER with ultralow overpotentials of 210 and 230 mV to reach 50 and 100 mA cm–2 current densities, respectively, in a 1 M KOH aqueous solution. The excellent OER performance of this Ni–Fe oxalate electrode can be attributed to its bimetallic composition and nanowire structure, which leads to an efficient ionic diffusion, high electronic conductivity, and fast electron transfer. The overall analysis indicates a suitable approach for designing electrocatalysts applicable in energy conversion.

Citation

Babar, P., Patil, K., Karade, V., Gour, K., Lokhande, A., Pawar, S., & Kim, J. H. (2021). In Situ Fabrication of Nickel–Iron Oxalate Catalysts for Electrochemical Water Oxidation at High Current Densities. ACS Applied Materials & Interfaces. doi:10.1021/acsami.1c14742

Acknowledgements

This work was supported by the Human Resources Development Program (No. 20194030202470) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant funded by the Korea Government Ministry of Trade, Industry, and Energy and supported by the Technology Development Program to Solve Climate Changes of the National Research Foundation (Grant No. 2016M1A2A2936784) funded by the Ministry of Science and ICT.