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AuthorAbu Hatab, Aymen S
AuthorAhmad, Yahia H
AuthorAbdul Rahman, Mohd B
AuthorAl-Qaradawi, Siham Y
Available date2022-01-25T04:40:23Z
Publication Date2022-01
Publication NameRSC Advances
Identifierhttp://dx.doi.org/10.1039/D1RA07304D
CitationHatab, A. S. A., Ahmad, Y. H., Rahman, M. B. A., & Al-Qaradawi, S. Y. (2022). Solution combustion synthesis of Ni-based hybrid metal oxides for oxygen evolution reaction in alkaline medium. RSC Advances, 12(3), 1694-1703.
URIhttp://hdl.handle.net/10576/25904
AbstractOxygen evolution reaction (OER) has arisen as an outstanding technology for energy generation, conversion, and storage. Herein, we investigated the synthesis of nickel-based hybrid metal oxides (NixM1−xOy) and their catalytic performance towards OER. NixM1−xOy catalysts were synthesized by solution combustion synthesis (SCS) using the metal nitrates as oxidizer and glycine as fuel. Scanning electron microscope (SEM) micrographs display a porous morphology for the hybrid binary NixM1−xOy, the common feature of combusted materials. X-ray diffraction (XRD) of NixM1−xOy depicted well-defined diffraction peaks, which confirms the crystalline nature of synthesized catalysts. The particle size of as-synthesized materials ranges between 20 and 30 nm with a mesoporous nature as revealed by N2-physisorption. The electrocatalytic performance of the as-prepared materials was evaluated towards OER in alkaline medium. Among them, NixCo1−xOy showed the best catalytic performance. For instance, it exhibited the lowest overpotential at a current density of 10 mA cm−2 (404 mV), onset potential (1.605 V), and Tafel slope (52.7 mV dec−1). The enhanced electrocatalytic performance of NixCo1−xOy was attributed to the synergism between cobalt and nickel and the alteration of the electronic structure of nickel. Also, NixCo1−xOy afforded the highest Ni3+/Ni2+ when compared to other electrocatalysts. This leads to higher oxidation states of Ni species, which promote and improve the electrocatalytic activity.
SponsorThe authors acknowledge the technical support of Central Laboratories Unit (CLU), Center for Advanced Materials (CAM), and Gas Processing Center (GPC), Qatar University, Doha, Qatar.
Languageen
PublisherThe Royal Society of Chemistry
SubjectOxygen Evolution Reaction
TitleSolution combustion synthesis of Ni-based hybrid metal oxides for oxygen evolution reaction in alkaline medium
TypeArticle
Pagination1694-1703
Issue Number3
Volume Number12
ESSN2046-2069
dc.accessType Open Access


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