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Study of the Electrochemical Deposition of Cu/Sn Alloy Nanoparticles on Boron Doped Diamond Films for Electrocatalytic Nitrate Reduction

Published online by Cambridge University Press:  14 January 2013

Jorge T. Matsushima ,
Andrea B. Couto ,
Neidenei G. Ferreira  and
Mauricio R. Baldan
Jorge T. Matsushima
Affiliation:
LABEMAC / INPE, 12245-970, São Jose dos Campos, SP, Brazil.
Andrea B. Couto
Affiliation:
LABEMAC / INPE, 12245-970, São Jose dos Campos, SP, Brazil.
Neidenei G. Ferreira
Affiliation:
LABEMAC / INPE, 12245-970, São Jose dos Campos, SP, Brazil.
Mauricio R. Baldan
Affiliation:
LABEMAC / INPE, 12245-970, São Jose dos Campos, SP, Brazil.
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Abstract

This paper presents the study of the electrochemical deposition of Cu/Sn alloy nanoparticles on Boron Doped Diamond (BDD) films in order to improve their electrocatalytic activity and selectivity for application in nitrate electrochemical reduction. Cyclic voltammetry measurements evidenced the formation of Cu/Sn alloy electrodeposited on BDD electrode. The electrodeposited Cu/Sn can be better visualized by analyzing the dissolution process. By studying the dissolution peak separately, the dissolution peak of the Sn was obtained at a more positive potential, when compared with the dissolution peak of Cu. From the scanning electronic microscopy (SEM) analysis, the homogeneous distribution of the Cu/Sn alloys particles on BDD surface with grain size in nanometric scale was verified. From X-ray diffraction analysis, two Cu/Sn alloy phases (Cu41Sn11 and Cu10Sn3) were identified for the electrodeposits obtained at -0.5V and charge of 0.26 C. The electrocatalytic reduction of nitrate in 0.1 M Britton-Robinson (BR) buffer solution with pH 9 was analyzed. The BDD electrode modified with Cu/Sn alloy nanoparticles proved to potentiate the electrocatalytic reduction of nitrate.

Keywords

alloydiamondelectrodeposition
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1511: Symposium EE – Diamond Electronics and Biotechnology—Fundamentals to Applications VI , 2013 , mrsf12-1511-ee05-07
Copyright
Copyright © Materials Research Society 2013

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References

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