Syntheses, Crystal Structures and Electrochemical Properties of Three New One-dimensional Compounds Based on the BiW9O33 Unit |
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Authors: | WU Jiang WANG Chun-Xiao SU Zhan-Hua YU Kai XU Yang-Lei ZHOU Bai-Bin |
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Institution: | Key Laboratory of Synthesis of Functional Materials and Green Catalysis, Colleges of Heilong/iang Province, Harbin Normal University, Harbin 150080, China |
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Abstract: | Three new one-dimensional compounds {NaO2(H2O)2}2{(M(H2O)2)2(WO2)2- (BiW9O33)2}]·16H3O+·XH2O (M = MnII (1), CoII (2), NiII (3)) have been synthesized in an aqueous solution, and structurally characterized by elemental analysis, IR, TG and single-crystal X-ray diffraction. These tungstobismuthates reveal that one common feature is the trivacant β-B-BiW9O33 Keggin fragment as the structural building unit. Two β-B-BiW9O33 units are connected by two WO2 groups with further stabilization by the addition of two M(H2O)22+ groups leading to the M2Bi2W20 anions, which are linked in a 1-D chain by bisodium cluster. Electrochemical analyses show that compounds 1–3 display unique redox properties and good electrocatalytic activity to reduce nitrite. |
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Keywords: | polyoxometalates aqueous solution sandwich-type electrochemical property |
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