Electron-Transfer Reactions at the Plasma鈥揕iquid Interface

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• 作者：Carolyn Richmonds ; Megan Witzke ; Brandon Bartling ; Seung Whan Lee ; Jesse Wainright ; Chung-Chiun Liu ; R. Mohan Sankaran
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：November 9, 2011
• 年：2011
• 卷：133
• 期：44
• 页码：17582-17585
• 全文大小：757K
• 年卷期：v.133,no.44(November 9, 2011)
• ISSN：1520-5126

文摘

Electrochemical reactions are normally initiated in solution by metal electrodes such as Pt, which are expensive and limited in supply. In this Communication, we demonstrate that an atmospheric-pressure microplasma can act as a gaseous, metal-free electrode to mediate electron-transfer reactions in aqueous solutions. Ferricyanide is reduced to ferrocyanide by plasma electrons, and the reduction rate is found to depend on discharge current. The ability to initiate and control electrochemical reactions at the plasma鈥搇iquid interface opens a new direction for electrochemistry based on interactions between gas-phase electrons and ionic solutions.