Effect of the type of Pt precursor on Pt-Ni nanostructures for electro-oxidation of ammonia

Title
Effect of the type of Pt precursor on Pt-Ni nanostructures for electro-oxidation of ammonia
Authors
김행수원동신이홍기유성종남기석김필
Keywords
Nanostructures; Composite materials; Electrochemical techniques; Electrochemical properties
Issue Date
2014-10
Publisher
Materials chemistry and physics
Citation
VOL 147, NO 3, 722-727
Abstract
The properties of Pt–Ni nanostructures were successfully controlled by employing different Pt precursors in the preparation of Pt–Ni nanocomposites, which were synthesized by a co-reducing Pt and Ni precursors. Pt–Ni nanostructures were obtained by leaching Ni species from the Pt–Ni nanocomposite. The use of H2PtCl6 as a precursor yielded aggregated small Pt particles, while [Pt(NH3)4]Cl2 yielded large hollow Pt nanostructures. A possible mechanism leading to the morphological difference between the two structures was suggested. Owing to a higher electrochemically active surface area and a favorable surface structure, hollow Pt nanostructures from the [Pt(NH3)4]Cl2 precursor showed significantly better performance in ammonia oxidation than the aggregated Pt particles resulting from the H2PtCl6 precursor.
URI
http://pubs.kist.re.kr/handle/201004/48174
ISSN
02540584
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KIST Publication > Article
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