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Aqueous Voltammetry in the Near Absence of Electrolyte
Author(s) -
Li Xiuting,
BatchelorMcAuley Christopher,
Laborda Eduardo,
Compton Richard G.
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201703525
Subject(s) - platinum , aqueous solution , electrochemistry , electrolyte , cyclic voltammetry , inorganic chemistry , chemistry , voltammetry , ionic bonding , supporting electrolyte , electrode , ion , analytical chemistry (journal) , chromatography , catalysis , organic chemistry
In order to minimize the incidence of the CO 2 hydrolysis and conduct aqueous electrochemistry in the virtual absence of electrolyte, a novel methodology is developed to achieve the near minimum conductivity (≈60 nS cm −1 ) for an aqueous solution through in situ deionization with ion exchange resin beads. Aqueous electrochemistry studying the oxidations of platinum, ferrocenemethanol, and hydrogen (H 2 ) were conducted in the near complete absence of trace ionic species at a platinum microelectrode ( d =10 μm). Both surface and solution phase electrochemical reactions were clearly observed, indicating that under these conditions there is a sufficiently compressed double layer for an interfacial electron transfer to be driven and the iR effects are significantly smaller than theoretically expected.