Structure and Catalytic Properties of a Cu2+-Containing Hydrogel of Zirconium Dioxide |
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| Authors: | Kovaleva E G Molochnikov L S Kharchuk V G Kuznetsova O V Shishmakov A B Yanchenko M Yu Buldakova L Yu Zhdanov I N Mikushina Yu V Petrov L A |
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| Institution: | (1) Ural State Forestry Engineering University, Yekaterinburg, Russia;(2) Institute of Organic Synthesis, Ural Division, Russian Academy of Sciences, Yekaterinburg, Russia;(3) Institute of Solid-State Chemistry, Ural Division, Russian Academy of Sciences, Yekaterinburg, 620219, Russia |
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| Abstract: | The distribution of Cu2+ ions in ZrO2 and sulfated ZrO2 hydrogel phases was studied by EPR spectroscopy and voltammetry. The formation of the following three types of copper structures was observed: mononuclear Cu2+ complexes (A), magnetic associates (B), and Cu2+ compounds (C) that gave no EPR signals under the conditions used in the spectroscopic measurements. The specific catalytic activity of various Cu2+ compounds in the liquid-phase reaction of 2,3,5-trimethyl-1,4-hydroquinone oxidation was determined. The copper complexes C were found to exhibit the highest catalytic activity. |
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