A New 2-Compartment Flow Through Cell for the Simultaneous Detection of Electrochemical Reaction Products by a Detection Electrode and Mass Spectroscopy

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• 作者：C.J. Bondue ; P. Kö ; nigshoven ; H. Baltruschat ; ^{baltruschat@uni-bonn.de" class="auth_mail" title="E-mail the corresponding author}
• 关键词：DEMS ; Flow Through Cell ; RRDE ; Oxygen Reduction ; Organic Electrolytes
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：1 October 2016
• 年：2016
• 卷：214
• 期：Complete
• 页码：241-252
• 全文大小：1947 K

文摘

In this article we present a novel 2-compartment flow through cell (6-electrode cell). The 6-electrode cell allows the operation of two working electrodes independent from each other one of which serves as a detection electrode. A current at the detection electrode signifies the formation of soluble species at the generator electrode. This approach is reminiscent of an RRDE arrangement.

However, the 6-electrode cell allows combination of RRDE-analogue experiments with differential electrochemical mass spectroscopy (DEMS). Volatile products formed at the detection electrode, therefore, can be identified via mass spectroscopy, which is not possible with an RRDE-arrangements. At the same time it is possible to identify volatile products formed at the generator electrode.

We demonstrate the application of the 6-electrode cell for the oxygen reduction reaction in Li⁺-containing DMSO based electrolyte. We will show that soluble products that react at the detection electrode are due to the oxidation of superoxide.