In Situ Fabrication of Nickel–Iron Oxalate Catalysts for Electrochemical Water Oxidation at High Current Densities
AuthorsBabar, Pravin Tukaram
Kim, Jin Hyeok
KAUST DepartmentAdvanced Membranes and Porous Materials Research Center
Online Publication Date2021-10-26
Print Publication Date2021-11-10
Embargo End Date2022-10-26
Permanent link to this recordhttp://hdl.handle.net/10754/673018
MetadataShow full item record
AbstractNi–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.
CitationBabar, 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
SponsorsThis 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.
PublisherAmerican Chemical Society (ACS)