In-situ reaction-growth of PtNi^sub X^ nanocrystals on supports for enhanced electrochemical catalytic oxidation of ethanol via continuous flow microfluidic process

An in-situ composite methodology was first proposed to prepare carbon supported PtNix (X = 1, 3, 1/3) via online reaction, nucleation and growth of nanocrystals (NCs) on carbon support along the microfluidic channel. Uniform dispersed ultra-small PtNiX NCs (1 nm–3 nm) with high surface exposed Pt at...

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Bibliographic Details
Published inElectrochimica acta Vol. 278; p. 149
Main Authors Wang, Junmei, Ye, Huanyu, Song, Yujun
Format Journal Article
LanguageEnglish
Published Oxford Elsevier BV 10.07.2018
Subjects
Catalysis
Catalytic activity
Catalytic oxidation
Continuous flow
Electrocatalysis
Ethanol
Nanocomposites
Nanocrystals
Oxidation
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Summary:An in-situ composite methodology was first proposed to prepare carbon supported PtNix (X = 1, 3, 1/3) via online reaction, nucleation and growth of nanocrystals (NCs) on carbon support along the microfluidic channel. Uniform dispersed ultra-small PtNiX NCs (1 nm–3 nm) with high surface exposed Pt atoms and enhanced nanocrystal-carbon interface interaction can be constructed. The annealed nanocomposites with a Pt/Ni ratio of 1/3 exhibit a mass catalytic activity of 7.6 times higher than the commercial Pt/C nanocatalysts in the ethanol oxidation reaction. The chronoamperometry measurement indicates that their mass activity still retains 3.6 times of the commercial Pt/C nanocatalysts at 4000 s. Moreover, PtNi3/C nanocatalysts have the highest tolerance to CO poisoning according to CO stripping measurements.
ISSN:0013-4686
1873-3859