Highly Ordered Hierarchical Pt and PtNi Nanowire Arrays for Enhanced Electrocatalytic Activity toward Methanol Oxidation

Highly ordered hierarchical Pt and PtNi nanowire arrays were prepared using CdS hierarchical nanowire arrays (HNWAs) as sacrificial templates and demonstrated high electrochemical active surface areas. For the resulting Pt HNWAs sample, the peak current for methanol oxidation at +0.74 V was almost 1...

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Published inACS applied materials & interfaces Vol. 10; no. 11; pp. 9444 - 9450
Main Authors Wang, Changzheng, Zhang, Yang, Zhang, Yajun, Xu, Ping, Feng, Cuimin, Chen, Tao, Guo, Tao, Yang, Fengnan, Wang, Qiang, Wang, Jingxiao, Shi, Mengtong, Fan, Louzhen, Chen, Shaowei
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 21.03.2018
Subjects
anodes
catalysts
electrochemistry
fuel cells
methanol
nanowires
nickel
oxidation
CdS nanoparticles
nanowire arrays
hierarchical nanostructure
methanol oxidation reaction
DMFCs
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Summary:Highly ordered hierarchical Pt and PtNi nanowire arrays were prepared using CdS hierarchical nanowire arrays (HNWAs) as sacrificial templates and demonstrated high electrochemical active surface areas. For the resulting Pt HNWAs sample, the peak current for methanol oxidation at +0.74 V was almost 1 order of magnitude higher than that of Pt solid nanowire arrays prepared in a similar manner but without the use of CdS template, and the addition of a Ni cocatalyst effectively enhanced the tolerance against CO poisoning. The results demonstrated that highly ordered Pt and PtNi HNWAs may be exploited as promising anode catalysts in the application of direct methanol fuel cells.
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ISSN:1944-8244
1944-8252
1944-8252
DOI:10.1021/acsami.7b19727