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Carbon- and Binder-Free Core-Shell Nanowire Arrays for Efficient Ethanol Electro-Oxidation in Alkaline Medium.

Carbon- and Binder-Free Core-Shell Nanowire Arrays for Efficient Ethanol Electro-Oxidation in Alkaline Medium.

Authors :
Guo F
Li Y
Fan B
Liu Y
Lu L
Lei Y
Source :
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2018 Feb 07; Vol. 10 (5), pp. 4705-4714. Date of Electronic Publication: 2018 Jan 23.
Publication Year :
2018

Abstract

To achieve high electrochemical surface area (ECSA) and avoid carbon support and binder in the anode catalyst of direct ethanol fuel cell, herein, we design freestanding core-shell nickel@palladium-nickel nanowire arrays (Ni@Pd-Ni NAs) without carbon support and binder for high-efficiency ethanol electro-oxidation. Bare Ni nanowire arrays (Ni NAs) are first prepared using the facile template-assistant electrodeposition method. Subsequently, the Ni@Pd-Ni NAs are formed using one-step solution-based alloying reaction. The optimized Ni@Pd-Ni NA electrode with a high ECSA of 64.4 m <superscript>2</superscript> g <superscript>-1</superscript> <subscript>Pd</subscript> exhibits excellent electrochemical performance (peak current density: 622 A g <superscript>-1</superscript> <subscript>Pd</subscript> ) and cycling stability for ethanol electro-oxidation. The facilely obtained yet high-efficiency core-shell Ni@Pd-Ni NA electrode is a promising electrocatalyst, which can be utilized for oxygen reduction reaction, urea, hydrazine hydrate, and hydrogen peroxide electro-oxidation, not limited to the ethanol electro-oxidation.

Details

Language :
English
ISSN :
1944-8252
Volume :
10
Issue :
5
Database :
MEDLINE
Journal :
ACS applied materials & interfaces
Publication Type :
Academic Journal
Accession number :
29333855
Full Text :
https://doi.org/10.1021/acsami.7b16615