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.
Original language | English (US) |
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Journal | ACS Applied Materials & Interfaces |
DOIs | |
State | Published - Oct 26 2021 |
Bibliographical note
KAUST Repository Item: Exported on 2021-11-01Acknowledgements: 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.
ASJC Scopus subject areas
- General Materials Science