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- Title
α‐Co(OH)<sub>2</sub> Thin‐Layered Cactus‐Like Nanostructures Wrapped Ni<sub>3</sub>S<sub>2</sub> Nanowires: A Robust and Potential Catalyst for Electro‐oxidation of Hydrazine.
- Authors
Xie, Yichun; Wang, Zining; Wang, Hui; Lu, Lei; Subramanian, Palaniappan; Ji, Shan; Kannan, Palanisamy
- Abstract
It is of significant urgency to fabricate highly active catalysts for electro‐oxidation of hydrazine for application in direct hydrazine fuel cells (DHFCs). Thus, in this work we grow three‐dimensional (3‐D) α‐Co(OH)2 thin‐layered cactus‐like nanostructures (shell) on the surface of Ni3S2 nanowires (core) enveloped nickel (Ni) foam substrate. HRTEM images clearly reveal that the α‐Co(OH)2 thin‐layered cactus‐like nanostructures (shell) are evenly surrounded on the surface of Ni3S2 nanowires (core). Notably, α‐Co(OH)2/Ni3S2 thin‐layered cactus‐like nanowires modified Ni foam displays an enhanced electro‐oxidation of hydrazine (340 mA current response and the onset oxidation potential of −1.10 V) than α‐Co(OH)2 sponge‐like, and Ni3S2 nanowire structures. The obtained enhanced electro‐catalytic response is mainly due to its electron rich Ni active centers, larger electrochemically active surface area, higher electrical conductivity, and porous surface‐structure formed by growing α‐Co(OH)2 thin‐layered cactus‐like nanostructures on the Ni3S2 nanowires, henceforth increasing the inherent activity and the number of available active sites/spots. Further, the α‐Co(OH)2/Ni3S2 thin‐layered cactus‐like nanowire catalyst shows notable stability (stable for more than a week) towards electro‐oxidation of hydrazine. Thus, as fabricated cactus‐like thin‐layered α‐Co(OH)2/Ni3S2 core‐shell nanowires catalyst can be considered as potential and robust catalyst for electro‐oxidation of hydrazine.
- Subjects
HYDRAZINE; NANOWIRES; NANOSTRUCTURES; ELECTRIC conductivity; ELECTROLYTIC oxidation; CATALYSTS; CACTUS; NICKEL films
- Publication
ChemElectroChem, 2021, Vol 8, Issue 5, p937
- ISSN
2196-0216
- Publication type
Article
- DOI
10.1002/celc.202100068