Adsorption of Water on FeOOH as Studied by Electrical Conductivity Measurements
Adsorption of Water on FeOOH as Studied by Electrical Conductivity Measurements
复制标题
通过电导率测量研究水在 FeOOH 上的吸附
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
K. Inouye
中科院分区：
文献类型：
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作者：
K. Kaneko;K. Inouye
在 30 °C 和各种频率（直流，100–10 MHz）下测量了合成 α-、β- 和 γ-FeOOH 晶体的电导率随吸附水量的变化。还考察了吸水 FeOOH 的电导率在 -140 至 140 °C 范围内随温度的变化。对于 0 到 0.5 之间的吸附覆盖度，由于电子从化学吸附的水分子转移到 FeOOH 晶体，电子传导随着覆盖度的增加而增加。观察到化学吸附传导的活化能降低。由于化学吸附而导致的电导率增加与每种 FeOOH 多晶型物的特征表面结构有关。在覆盖范围 0.7-2 内，吸附水层中的质子传输电荷。电导率对数与水蒸气相对压力对数之间的线性关系表明 FeOOH 表面存在物理吸附水分子簇。价格的急剧变化...
Changes in the electrical conductivity of synthetic α-, β-, and γ-FeOOH crystals with the amount of adsorbed water were measured at 30 °C and various frequencies (dc, 100–10 MHz). The conductivity variations of wateradsorbed FeOOH with temperature were also examined over the range from −140 to 140 °C. For the adsorption coverages between 0 and 0.5, the electronic conduction increased with the coverage due to the transfer of electrons from chemisorbed water molecules to the FeOOH crystal. The decrease in activation energy for conduction with chemisorption was observed. The conductivity increase due to the chemisorption is related to the characteristic surface structure of each FeOOH polymorph. In the coverage range 0.7–2, protons in the adsorbed water layer transport electrical charges. The linear relationships between the logarithm of conductivity and the logarithm of the relative pressure of water vapor suggest the presence of clusters of physisorbed water molecules on FeOOH surfaces. A steep change in p...