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CoxNiy-decorated graphene as novel, stable and super effective non-precious electro-catalyst for methanol oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
45058 46395 2014 11 PDF Available
Title
CoxNiy-decorated graphene as novel, stable and super effective non-precious electro-catalyst for methanol oxidation
Abstract

•NiCo-decorated graphene is introduced as distinct catalysts for methanol oxidation.•The introduced decorated graphene reveal negative onset potential of −40 mV.•The influences of NPs composition and loading were investigated.•Distinct stability was observed.

Graphene and alloy structure can overcome the main problem facing the non-precious electro-catalysts; low performance and poor stability. In this study, CoxNiy-decorated graphene is introduced as novel, super effective and stable non-precious electro-catalyst for methanol oxidation. The obtained results have indicated that utilizing graphene as a support strongly enhances the electro-catalytic activity as the current density was doubled ten times, moreover a negative onset potential (−40 mV vs. Ag/AgCl) was obtained which is a distinct progress in the non-precious electro-catalysts research field. The electronic structure which is controlled by the alloy composition showed strong influence on the electro-catalytic activity; Co0.2Ni0.2 alloy nanoparticles revealed the best performance while Co0.1Ni0.3 nanoparticles were the worst. Due to the alloy structure, the introduced graphene-supported electro-catalyst reveals distinguished stability. In-situ decoration of graphene by CoxNiy alloy nanoparticle is utilized to produce the introduced electro-catalyst. Briefly, cobalt acetate and nickel acetate were added to the reaction media during graphene preparation using a modified chemical route. Later on, the resultant material was calcined in argon atmosphere at 850 °C. The utilized physicochemical characteristics affirmed formation of multi-layer graphene sheets decorated by solid solution CoxNiy alloy nanoparticle.

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Keywords
Graphene; Methanol electrooxidation; Non-precious electrocatalyst; DMFCs; CoNi alloy
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CoxNiy-decorated graphene as novel, stable and super effective non-precious electro-catalyst for methanol oxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 154–155, July–August 2014, Pages 221–231
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us