Preparation of COF2 using CO2 and F2 in the electrochemical cell with PbSnF4 as a solid electrolyte
Preparation of COF2 using CO2 and F2 in the electrochemical cell with PbSnF4 as a solid electrolyte
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以PbSnF4为固体电解质的电化学电池中CO2和F2制备COF2
DOI：
10.1016/j.jfluchem.2007.04.016
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发表时间：
2007
影响因子：
1.9
通讯作者：
M. Takashima
中科院分区：
文献类型：
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作者：
Y. Hasegawa;A. Nagasaka;Kim， Jae;S. Yonezawa;M. Takashima
以硝酸铅和氟化锡为原料，采用沉淀法制备了四方相PbSnF4。用X射线衍射仪(X射线衍射仪)、X射线荧光光谱仪(XFS)等化学分析手段对产物进行了表征。作为氟离子导体，四方PbSnF4在473K的空气中表现出最高的电导率3.2Sm−1。我们研究了在以PbSnF4为固体电解质的电化学池中用CO2和F2生成COF2的可能性。与此同时，我们试图从电化学电池中产生电能。这种CO_2/F_2电化学池是用具有Au电极的四方PbSnF_4圆盘构成的。在0.1 Mpa CO2/(0.01 Mpa F2+0.09 Mpa Ar)下，室温下的电动势约为0.9V。然而，短路电流密度为0.24Am−2，这是相当小的。电流密度很小，放电3h后，FT-IR检测不到氟碳化合物。
Tetragonal PbSnF4was prepared by precipitation method with Pb(NO3)2and SnF2aqueous solutions. The product was characterized using X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XFS), and the other chemical analyses. Tetragonal PbSnF4exhibited the highest electric conductivity of 3.2Sm−1at 473K in air as a fluoride ion conductor. We have investigated the possibility of COF2formation using CO2and F2in an electrochemical cell with PbSnF4as a solid electrolyte. At same time, we tried to produce an electric power from an electrochemical cell. This CO2/F2electrochemical cell was constructed with a tetragonal PbSnF4disk having Au electrodes. The electromotive force was about 0.9V at room temperature for 0.1MPa CO2/(0.01MPa F2+0.09MPa Ar). However, the short circuit current density was 0.24Am−2, which was quite small. This current density was so small that no fluorocarbon compound was detected after 3h discharge using FT-IR.
Yoji Kawamoto：“Zr－EXAFS氟离子研究－传导ZrF_4－BaF_2－CsF玻璃”固态离子。
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