Double layer structure in a supercritical fluid
Double layer structure in a supercritical fluid
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超临界流体中的双层结构
DOI：
10.1021/jp991706m
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发表时间：
1999
影响因子：
6.6
通讯作者：
C. Eardley
中科院分区：
文献类型：
--
作者：
A. Abbott;C. Eardley
本文首次报道了极性超临界流体中双电层电容的测量结果。四丁基四氟硼酸铵(TBA BF4)电解液在超临界二氟甲烷(HFC 32)中在铂电极上的电容与流体密度密切相关。在高压下，电容−电势图表现出类似于液态的双层响应，但当压力降低到临界值时，扩散层坍塌，观察到纯粹的亥姆霍兹响应。
This work reports the first double layer capacitance measurements in a polar supercritical fluid. The capacitance of a tetrabutylammonium tetrafluoroborate (TBA BF4) electrolyte in supercritical difluoromethane (HFC 32) at a platinum electrode is shown to be strongly dependent on fluid density. At high pressures the capacitance−potential plots exhibit a double layer response similar to that in the liquid state, but as the pressure is lowered toward the critical value the diffuse layer collapses and a pure Helmholtz response is observed.