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Oxide coated nickel powder as support for platinum(0) nanoparticles: Magnetically separable catalysts for hydrogen generation from the hydrolysis of ammonia borane
Date
2024-10-15
Author
Akbayrak, Serdar
Çakmak, Gülhan
Öztürk, Tayfur
Özkar, Saim
Metadata
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We report the development of a novel method for the preparation of magnetically separable platinum nanoparticles. Magnetic nickel nanopowder is initially synthesized in a radiofrequency plasma reactor where in-line passivation was carried out with oxygen gas, resulting in the formation of nickel oxidecoated nickel particles. Following this, platinum nanoparticles are deposited onto the surface of the oxidecoated nickel nanopowder, forming Pt0/Ni@NiO nanocatalysts for the hydrolytic dehydrogenation of ammonia borane. The Pt0/Ni@NiO nanoparticles, containing 0.24 % wt. Pt, exhibit remarkable catalytic activity in the hydrolytic dehydrogenation of ammonia borane, with a turnover frequency of 468 (mol H2)×(mol Pt)−1×min−1 for releasing 3 equivalent H2 gas per mole of ammonia borane from its hydrolysis at 25 ºC. This heightened catalytic activity of Pt0/Ni@NiO nanoparticles is attributed to the favorable metal-support interaction between the platinum(0) nanoparticles and oxide surface, namely the bonding of platinum to the oxide surface, as elucidated by the XPS analysis. More importantly, Pt0/Ni@NiO nanoparticles can be separated from the reaction solution by using an external magnet.
Subject Keywords
Ammonia borane
,
Catalyst
,
Hydrogen
,
Nanoparticles
,
Nickel oxide
,
Platinum
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85196627215&origin=inward
https://hdl.handle.net/11511/110305
Journal
Journal of Alloys and Compounds
DOI
https://doi.org/10.1016/j.jallcom.2024.175199
Collections
Department of Metallurgical and Materials Engineering, Article
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BibTeX
S. Akbayrak, G. Çakmak, T. Öztürk, and S. Özkar, “Oxide coated nickel powder as support for platinum(0) nanoparticles: Magnetically separable catalysts for hydrogen generation from the hydrolysis of ammonia borane,”
Journal of Alloys and Compounds
, vol. 1002, pp. 0–0, 2024, Accessed: 00, 2024. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85196627215&origin=inward.