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Synthesis and performance of solid proton conductor molybdovanadosilicic acid

机译:固体质子导体钼钒硅酸的合成与性能

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A molybdovanadosilicic acid H _(5) SiMo _(11) VO _(40) ·8H _(2) O was synthesized and investigated in this work. The structure features and hydration degree of this acid were characterized by IR, UV, XRD and TG-DTA. Its proton conductivity was studied by electrochemical impedance spectroscopy (EIS). The EIS measurements demonstrated that H _(5) SiMo _(11) VO _(40) ·8H _(2) O showed excellent proton conduction performance with proton conductivity reaching 5.70 × 10 ~(?3) S cm ~(?1) at 26 °C and 70% relative humidity. So, it is a new solid high proton conductor. The conductivity enhances with the increase of temperature, and it exhibits Arrhenius behavior. The activation energy value for proton conduction is 21.4 kJ mol ~(?1) , suggesting that the proton transfer in this solid acid is dominated by Vehicle mechanism.
机译:合成并研究了钼钒硅酸H _(5)SiMo _(11)VO _(40)·8H _(2)O。通过IR,UV,XRD和TG-DTA表征了该酸的结构特征和水合度。通过电化学阻抗谱(EIS)研究了其质子电导率。 EIS测量结果表明H _(5)SiMo _(11)VO _(40)·8H _(2)O表现出优异的质子传导性能,质子传导率达到5.70×10〜(?3)S cm〜(?1 )在26°C和70%相对湿度下。因此,它是一种新型的固体高质子导体。电导率随温度的升高而增强,并表现出阿累尼乌斯行为。质子传导的活化能值为21.4 kJ mol〜(?1),表明质子在这种固体酸中的转移受媒介机理支配。

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