fulltext.study @t Gmail

NiCu bimetallic nanoparticle-decorated graphene as novel and cost-effective counter electrode for dye-sensitized solar cells and electrocatalyst for methanol oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
39154 45809 2015 7 PDF Available
Title
NiCu bimetallic nanoparticle-decorated graphene as novel and cost-effective counter electrode for dye-sensitized solar cells and electrocatalyst for methanol oxidation
Abstract

•NiCu bimetallic nanoparticles-decorated graphene are introduced by simple methods.•NiCu bimetallic-graphene can be effectively used as efficient and cost-effective CE.•The introduced NiCu bimetallic-graphene reveal high conversion efficiency; 5.1%.

NiCu bimetallic nanoparticle-decorated graphene was prepared by hydrothermal treatment to be utilized as an efficient and alternative Pt-free counter electrode (CE) for dye-sensitized solar cells (DSSCs). The results indicated that the performance of the introduced modified graphene as CE strongly depends on the composition of the metallic nanoparticles. Typically, Ni-, Ni0.25Cu0.75-, Ni0.6Cu0.4- and Ni0.75Cu0.25-decorated graphene were synthesized. Investigation of the electrochemical characteristics indicated that the graphene decorated by Ni0.75Cu0.25 nanoparticles shows the highest catalytic activity and conductivity compared to the other prepared formulations as well as pristine graphene. In DSSC, Ni0.75Cu0.25 nanoparticle-decorated graphene can remarkably improve the catalytic activity toward triiodide reduction and lower the resistance at the electrolyte–CE interface. Accordingly, the obtained energy conversion efficiencies were 1.72%, 2.39%, 1.24%, 2.87% and 5.1% for pristine, Ni-, Ni0.25Cu0.75-, Ni0.6Cu0.4- and Ni0.75Cu0.25-decorated graphene, respectively. The obtained efficiency for Ni0.75Cu0.25-decorated graphene is comparable with Pt-based DSSC fabricated by the same procedure (5.9%) which recommends exploiting the introduced modified graphene as efficient and cost-effective CE for the large-scale fabrication of photovoltaic devices. The catalytic performance of the best formulation was examined toward methanol electrooxidation; the results indicated effective and stable electrocatalytic activity.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (220 K)Download as PowerPoint slide

Keywords
NiCu bimetallic; Graphene; Counter electrode; Dye sensitized solar cells; Conversion efficiency
First Page Preview
NiCu bimetallic nanoparticle-decorated graphene as novel and cost-effective counter electrode for dye-sensitized solar cells and electrocatalyst for methanol oxidation
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 501, 25 July 2015, Pages 41–47
Authors
, , , , , , , ,
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