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Bifunctional Electrocatalytic Films with Gold Nanoparticles and Metalloporphyrin: Preparation and Characterization

Published online by Cambridge University Press:  21 March 2011

Wenjun Yang ,
Xiaoyuan Li  and
Nai-Teng Yu
Wenjun Yang
Affiliation:
Department of Chemistry, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, SAR Hong Kong, P. R. China
Xiaoyuan Li
Affiliation:
Department of Chemistry, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, SAR Hong Kong, P. R. China
Nai-Teng Yu
Affiliation:
Department of Chemistry, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, SAR Hong Kong, P. R. China
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Abstract

Bifunctional electrocatalytic films were prepared employing a layer-by-layer assembly approach. The cation, metalloporphyrin (MP), and the anion, potassium tetrachloroaurate (KAuCl4) were alternatively assembled on glass or indium-doped tin oxide (ITO) supports. The assembled AuCl4 - ions were then converted to gold nanoparticles (Aun) under the exposure to ultraviolet light. Film growth at each adsorption step was monitored by UV-Vis absorption spectroscopy and cyclic voltammetry (CV). The formation of gold nanoparticles was characterized by UV-Vis absorption spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). Bifunctional electrocatalytic activity of the film was demonstrated in the oxidative detection of nitric oxide (NO) over Aun and the reductive detection of oxygen (O2) over Co(II)P in the same CV scan.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 676: Symposium Y – Synthesis, Functional Properties and Applications of Nanostructures , 2001 , Y3.26
Copyright
Copyright © Materials Research Society 2001

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References

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