Inorganic–organic hybrid polyoxometalate nanoparticle modified wax impregnated graphite electrode: preparation, electrochemistry and electrocatalysis

• Published in: Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2002-04, Vol.523 (1), p.142-149
• Main Authors: Wang, Xiuli, Kang, Zhenhui, Wang, Enbo, Hu, Changwen
• Format: Article
• Language: English
• Subjects: Chemistry; Electrocatalysis; Electrochemistry; Electrodes: preparations and properties; Exact sciences and technology; General and physical chemistry; Inorganic–organic hybrid; Modified electrode; Other electrodes; Polyoxometalate nanoparticles; Sol–gel technique
• ISSN: 1572-6657; 1873-2569
• DOI: 10.1016/S0022-0728(02)00742-8

A kind of inorganic–organic hybrid polyoxometalate (POM) nanoparticle [(CH 3) 4N] 6P 2Mo 18O 62 · 9H 2O has been designed and prepared by solid-state reaction at room temperature and immobilized on the surface of a wax impregnated graphite electrode (WIGE) by the sol–gel technique for the first time. The electrochemical behavior of the [(CH 3) 4N] 6P 2Mo 18O 62 · 9H 2O nanoparticle modified WIGE (P 2Mo 18-WIGE) has been studied in detail, including pH-dependence, solvent effect and stability. The electrocatalytic behavior of the P 2Mo 18-WIGE toward the reduction of chlorate, hydrogen peroxide and nitrite in 1 M H 2SO 4 aqueous solution is reported. The experimental results show that the P 2Mo 18-WIGE not only maintains the electrochemical activity and electrocatalytic properties of the H 6P 2Mo 18O 62, but also shows remarkable stability due to insolubility of the hybrid POM nanoparticles, which is important for practical applications. The significance of our research work is to provide a kind of novel and very stable POM-based solid nano-material applied in electrode modification.