Preparation, electrochemical property and application in chemically bulk-modified electrode of a hybrid inorganic–organic silicomolybdate nanoparticles

A kind of hybrid inorganic–organic silicomolybdate nanoparticles (SNP) was designed and prepared by solid state reaction at room temperature and characterized by TEM, IR and XRD. The SNP was used as a bulk-modifier to fabricate a chemically modified carbon paste electrode (CPE) by direct mixing. The...

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Bibliographic Details
Published in:Materials letters 2002-10, Vol.56 (4), p.393-396
Main Authors: Wang, Xiuli, Kang, Zhenhui, Wang, Enbo, Hu, Changwen
Format: Article
Language:English
Subjects:
Bulk-modifiedcarbon paste electrode
Electrocatalytic activity
Electrochemical behavior
Inorganic–organic hybrid
Polyoxometalates
Silicomolybdate nanoparticles
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Summary:A kind of hybrid inorganic–organic silicomolybdate nanoparticles (SNP) was designed and prepared by solid state reaction at room temperature and characterized by TEM, IR and XRD. The SNP was used as a bulk-modifier to fabricate a chemically modified carbon paste electrode (CPE) by direct mixing. The electrochemical behavior of the SNP was investigated by cyclic and square-wave voltammetry for the first time. Three couples of reversible redox peaks are observed which correspond to reduction and oxidation through two-, four- and six-electron process, respectively, in the range of +700 to −100 mV. The SNP dispersed in CPE displays good electrocatalytic activity toward the reduction of nitrite. The remarkable advantage of the SNP bulk-modified CPE is its excellent reproducibility of surface renewal, as well as long-term stability owing to the strong interaction between the organic component and inorganic heteropoly anion.
ISSN:0167-577X
1873-4979
DOI:10.1016/S0167-577X(02)00497-4