A new high-temperature inorganic–organic proton conductor: lanthanum sulfophenyl phosphate
A new high-temperature inorganic–organic proton conductor: lanthanum sulfophenyl phosphate
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DOI：
10.1515/chempap-2015-0219
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发表时间：
2016-03
期刊：
影响因子：
2.2
通讯作者：
Min-Kyu Song;Zhongfang Li;Guohong Liu;Suwen Wang;Xiaoyan Yin;Yuxin Wang
中科院分区：
文献类型：
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作者：
Min-Kyu Song;Zhongfang Li;Guohong Liu;Suwen Wang;Xiaoyan Yin;Yuxin Wang
以间磺基苯基膦酸和硝酸镧为原料合成了磺基苯基磷酸镧（LaSPP）。紫外-可见分光光度法和傅里叶变换红外光谱法表明得到了目标产物，能量色散X射线光谱法和扫描电子显微镜测定了其元素组成和典型的层状结构。透射电子显微镜（TEM）证明了其典型的层状结构，X射线衍射谱表明其结晶性良好，层间距约为15.67 nm，与TEM（2.0 nm）得到的值相匹配。热重和差热分析表明LaSPP具有良好的热稳定性。在不同温度和相对湿度（RH）下测量LaSPP的质子电导率，在150°C和100%RH下达到0.123 S cm−1的值。质子转移活化能为22.52 kJ mol−1。在160°C和50%RH下，电导率为0.096 S cm-1。在干燥箱中，电导率保持在1.118 × 10−2 S cm−1的值。结果表明，LaSPP是一种高效的无机-有机导体。
Lanthanum sulfophenyl phosphate (LaSPP) was synthesized by m-sulfophenyl phosphonic acid and lanthanum nitrate. UV-Vis spectrophotometry and Fourier-transform infrared spectroscopy indicate that the desired product was obtained and its elementary composition and typical layered structure were determined by energy dispersive X-ray spectroscopy and scanning electron microscopy. Transmission electron microscopy (TEM) proved its typical layered structure and X-ray diffraction spectroscopy indicated its good crystallinity and the interlayer distance of about 15.67 Å, which matches the value obtained by TEM (2.0 nm). Thermogravimetry and differential thermal analysis revealed good thermal stability of LaSPP. Proton conductivity of LaSPP was measured at different temperatures and relative humidities (RH), reaching values of 0.123 S cm−1 at 150°C and 100 % RH. Proton transfer activation energy was 22.52 kJ mol−1. At 160°C and 50 % RH, the conductivity was 0.096 S cm−1. In the drying oven, the conductivity retained the value of 1.118 × 10−2 S cm−1. The results show that LaSPP is a highly effective inorganic-organic conductor.