吗啉修饰的硅钨酸盐化合物[H2N(CH2CH2)2O]4[SiW(12)O40]·4H2O的合成、晶体结构及电催化性质研究

Preparation,Characterization and Electrochemical Investigation of A New Inorganice-organic Hybrid Material H_2N(CH_2CH_2)_2O]_4[SiW_(12)O_(40)]·4H_2O

应用一步合成方法,合成了一种吗啉为抗衡阳离子的硅钨酸盐化合物[H_2N(CH_2CH_2)_2O]_4[SiW_(12)O_(40)]·4H_2O,通过元素分析、X-射线单晶衍射、红外光谱、紫外光谱和热重对晶体进行了表征.该化合物晶体属于单斜晶系,P21/C空间群,a=1.027 3(3)nm,b=4.402 8(14)nm,c=1.230 0(4)nm,β=112.943(9)°,V=5.211(3)nm3,Z=4.电化学实验证明,该硅钨酸盐化合物在水溶液中对NO-2具有良好的电催化活性.

A new polyoxometalate H_2N（CH_2CH_2）_2O]_4[SiW_（12）O_（40）]·4H_2O,has been synthesized in aqueous solution and characterized by elemental analysis,IR spectroscopy,thermogravimetric analysis（ TGA） and single-crystal X-ray diffraction.The crystals are monoclinic,P21 / C,a = 1.027 3（ 3） nm,b = 4.402 8（ 14） nm,c= 1.230 0（ 4） nm,β = 112.943（ 9） °,V = 5.211（ 3） nm3,Z = 4.The electrochemical properties of the compound in aqueous solution are studied at room temperature. It was found that the compound presents good electrocatalytic activities for the reduction of NO_2-.