Sphere-like Co-doped Ni metal-organic framework for enhanced oxygen evolution reaction
Issued Date
2025-12-01
Resource Type
ISSN
00223697
eISSN
18792553
Scopus ID
2-s2.0-105007462396
Journal Title
Journal of Physics and Chemistry of Solids
Volume
207
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Physics and Chemistry of Solids Vol.207 (2025)
Suggested Citation
Sivakumar M., Vediyappan V., Bhuvaneshwari M., Muthukutty B., Kumar P.S., Kim S.C., Alagumalai K., Sandoval-Hevia G. Sphere-like Co-doped Ni metal-organic framework for enhanced oxygen evolution reaction. Journal of Physics and Chemistry of Solids Vol.207 (2025). doi:10.1016/j.jpcs.2025.112918 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/110677
Title
Sphere-like Co-doped Ni metal-organic framework for enhanced oxygen evolution reaction
Corresponding Author(s)
Other Contributor(s)
Abstract
In recent years, economically viable multifunctional materials with large surface areas and exposed active metal sites, based on bimetallic metal-organic frameworks (MOFs), have emerged as excellent candidates for oxygen evolution reaction (OER). In this study, we synthesized sphere-like Co@Ni-MOF-X and Ni-MOF samples via a hydrothermal approach using 1,4-dicarboxylic acid as the organic source. Surface morphology and XRD patterns of the sphere-like Co@Ni-MOF-X and Ni-MOF samples were examined to confirm their crystallographic structure, phase purity, and morphology of as synthesized MOFs. Subsequently, modified electrodes using the sphere-like Co@Ni-MOF-X and Ni-MOF samples were subjected to electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV) to assess their charge transfer resistance (R<inf>ct</inf>) and OER performance in alkaline media. The Co@Ni-MOF-2 (317 mV) and Co@Ni-MOF-3 (293 mV) samples exhibited promising OER performance at a scan rate of 10 mV s<sup>−1</sup>. Additionally, the Co@Ni-MOF-2 and Co@Ni-MOF-3 samples showed Tafel plot values of 140 and 168 mV dec<sup>−1</sup>, respectively. Furthermore, Co@Ni-MOF-2 demonstrated good stability performance.