Xie Zhirong, Wu Han, Wu Qingyin, Ai Limei
Department of Chemistry, Zhejiang University Hangzhou 310027 P. R. China
School of Biomedical and Chemical Engineering, Liaoning Institute of Science and Technology Benxi 117004 Liaoning P. R. China.
RSC Adv. 2018 Apr 16;8(25):13984-13988. doi: 10.1039/c8ra02390e. eCollection 2018 Apr 11.
A molybdovanadosilicic acid HSiMoVO·8HO 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 HSiMoVO·8HO showed excellent proton conduction performance with proton conductivity reaching 5.70 × 10 S cm 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, suggesting that the proton transfer in this solid acid is dominated by Vehicle mechanism.
在本工作中合成并研究了一种钼钒硅酸 HSiMoVO·8H₂O。通过红外光谱（IR）、紫外光谱（UV）、X 射线衍射（XRD）和热重-差热分析（TG-DTA）对该酸的结构特征和水合程度进行了表征。通过电化学阻抗谱（EIS）研究了其质子传导率。EIS 测量表明，HSiMoVO·8H₂O 在 26℃和相对湿度 70%时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。因此，它是一种新型的固体高质子导体。电导率随温度升高而增强，并呈现出阿累尼乌斯行为。质子传导的活化能值为 21.4 kJ/mol，这表明该固体酸中的质子转移主要由载流子机制主导。
