Palladium nanoparticles deposit on multi-walled carbon nanotubes and their catalytic applications for electrooxidation of ethanol and glucose

A facile spontaneous redox method is developed to obtain uniform palladium nanoparticles (PdNPs) distributed on surfactant-functionalized multi-walled carbon nanotubes (MWCNTs) at room temperature. In this synthesis, hexadecyltrimethylammonium bromide (CTAB) was self-assembled onto MWCNTs to provide...

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Bibliographic Details
Published in:Electrochimica acta 2013-12, Vol.112, p.756-762
Main Authors: Cai, Zhi-xiong, Liu, Cong-cong, Wu, Geng-huang, Chen, Xiao-mei, Chen, Xi
Format: Article
Language:English
Subjects:
Anodizing
Catalysts
CTAB
Electrocatalyst
Enzyme-free
Ethanol
Ethyl alcohol
Glucose
Multi wall carbon nanotubes
Multi-walled carbon nanotubes
Nanoparticles
Palladium
Palladium nanoparticles
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Summary:A facile spontaneous redox method is developed to obtain uniform palladium nanoparticles (PdNPs) distributed on surfactant-functionalized multi-walled carbon nanotubes (MWCNTs) at room temperature. In this synthesis, hexadecyltrimethylammonium bromide (CTAB) was self-assembled onto MWCNTs to provide adsorption sites for PdCl42− ions. Interestingly, PdCl42− was spontaneously reduced though a galvanic cell effect between PdCl42− and MWCNTs. The as-prepared Pd catalyst showed excellent catalytic activity toward oxidation of ethanol and glucose in an alkaline medium. Inspired by this, a glucose enzyme-free biosensor was developed with a wide linear range covering from 1mM to 20mM and a high sensitivity of 11μAmM−1cm−2 (to 1–10mM) and 6.3μAmM−1cm−2 (to 11–20mM). These results indicate that the as-synthesized Pd catalyst could be a great potential material for improving performance of direct ethanol fuel cells and glucose sensors.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2013.09.040