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Microhole‐voltammograms Controlled by Solution Reservoir at Cationic and Anionic Ion Exchange Membranes
Author(s) -
Liu Ling,
Aoki Koichi Jeremiah,
Chen Jingyuan
Publication year - 2021
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.202100111
Subject(s) - membrane , cationic polymerization , ion exchange membranes , rectification , ion , ionic bonding , ion exchange , voltammetry , cyclic voltammetry , materials science , analytical chemistry (journal) , inorganic chemistry , chemistry , electrode , chemical physics , chemical engineering , voltage , electrochemistry , chromatography , polymer chemistry , organic chemistry , physics , biochemistry , quantum mechanics , engineering
Abstract Microhole‐voltammetry in which ions pass through a hole by electric migration exhibits rectified current‐voltage curves. The rectification ratio, being of the high conductance to the low one, seems to depend on properties of ion exchange membranes. Our experiments at a cationic and an anionic membrane showed that the ratios for both the membranes were similar in spite of large difference in ionic capacities. The ratio was controlled by geometry of the reservoir of the solution rather than hole geometry and properties of membranes. Our model was composed of resistances of the hole, the membranes and the reservoir in series.