Aqueous Voltammetry in the Near Absence of Electrolyte

作者：Li Xiuting; Batchelor McAuley Christopher; Laborda Eduardo; Compton Richard G^*

来源：Chemistry - A European Journal, 2017, 23(60): 15222-15226.

DOI：10.1002/chem.201703525

• absence of supporting electrolyte
• aqueous voltammetry
• ion-exchange resin beads
• low conductivity solution
• microelectrode

In order to minimize the incidence of the CO2 hydrolysis and conduct aqueous electrochemistry in the virtual absence of electrolyte, a novel methodology is developed to achieve the near minimum conductivity (approximate to 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 m). 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.

• 出版日期2017-10-26