Electrochemical behavior of α-Keggin-type nanoparticles,Co(en)3(PMo12O40), in polyethylene glycol |
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Authors: | Feng Zhao Lihua Bi Junguang Jiang Li Qi Mingkui Wang Shaojun Dong |
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Affiliation: | (1) State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China, |
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Abstract: | The electrochemical behavior of α-Keggin-type nanoparticles, Co(en)3(PMo12O40) (abbreviated as PMo12-Co), have been studied in poly(ethylene glycol) for four different molecular weights (PEG, average MW 400, 600, 1000, and 2000 g mol–1) and containing LiClO4 (O/Li=100/1) supporting electrolyte. The diffusion coefficients of the PMo12-Co nanoparticles were determined using a microelectrode by chronoamperometry for PEG of different molecular weights that were used to describe the diffusion behavior of PMo12-Co nanoparticles in different phase states. Moreover, the conductivity of the composite system increases upon addition of PMo12-Co nanoparticles, which was measured by an a.c. impedance technique. FT-IR spectra and DSC were used to follow the interactions of PEG-LiClO4-PMo12-Co, and well described the reason that the PMo12-Co nanoparticles could promote the conductivity of the PEG-LiClO4-PMo12-Co system. Electronic Publication |
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Keywords: | Diffusion coefficient Polyoxometalates Poly(ethylene glycol) Nanoparticles Microelectrode |
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