Inorganic‐organic Microporous Solid of Wells‐Dawson Type Polyoxometalate: Synthesis,Characterization, and Electrochemical Properties |
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Authors: | Aixiang Tian Zhangang Han Jun Peng Prof. Dr. Jiangli Zhai Yulong Zhao |
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Affiliation: | 1. Changchun / P. R. China, Key Laboratory of Polyoxometalate Science of Ministry of Education Faculty of Chemistry, Northeast Normal University;2. Shijiazhuang, Hebei / P. R.China, Faculty of Chemistry, Hebei Normal University;3. Changchun / P. R. China, Key Laboratory of Polyoxometalate Science of Ministry of Education Faculty of Chemistry, Northeast Normal UniversityInstitute of Polyoxometalate Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin, 130024 / P. R. China, Tel: +86 4315099765;4. fax: +86‐431‐5099667 |
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Abstract: | An inorganic‐organic hybrid solid (H6/5bppy)5[P2W18O62]·4.5H2O ( 1 ) (bppy = 4‐(5‐(4‐bromophenyl)pyridin‐2‐yl)pyridine) was hydrothermally synthesized by using pre‐constructed Wells‐Dawson type salt α‐K6P2W18O62·15H2O as inorganic moiety. The crystal structure keeps integrated and steady under the interactions together of aryl packing, hydrogen bonding and halogen bonding. X‐ray single crystal structure analysis reveals that compound 1 contains cavities with the sizes of about 6 × 8Å, in which H2O molecules are captured. The hybrid was used as a solid bulk modifier to fabricate a three‐dimensional bulk‐modified carbon paste electrode ( 1 ‐CPE) by direct mixing. The electrochemical and electrocatalytic behavior of the 1 ‐CPE has been studied in detail. The results exhibit that the redox ability of the Wells‐Dawson polyanions can be maintained in the hybrid solid, which has a good electrocatalytic activity toward the reduction of bromate and hydrogen peroxide. A hydrodynamic voltammetric experiment was performed to characterize the electrode as an amperometric sensor for the determination of hydrogen peroxide. The 1 ‐CPE showed long‐term stability and excellent reproducibility of surface renewal. |
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Keywords: | Wells‐Dawson type Polyoxometalates Inorganic‐organic hybrid materials Electrochemistry Electrocatalysis |
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