Plasma electrochemistry: voltammetry in a flame plasma electrolyte.
Plasma electrochemistry: voltammetry in a flame plasma electrolyte.
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等离子体电化学：火焰等离子体电解质中的伏安法。
DOI：
10.1039/c2cp43431h
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
D. Caruana
中科院分区：
文献类型：
--
作者：
A. Elahi;D. Caruana
在本文中，我们提出了详细的动态电化学测量在火焰等离子体电解质中的氧化钨盐的存在。使用常规循环伏安法在1 V和-9 V之间的操作电位窗口中测量定义的可再现氧化还原过程。由于不存在溶剂及其由于在高过电位下的溶剂电解引起的相关限制，这种宽电位窗口是可能的。通过开发由氧化钇稳定的氧化锆（YSZ）组成的新参比电极来实现测量，该参比电极在1100 K下保持稳定的电势。在本文中，我们专注于发展的唯象理解的电子转移在固-气界面，使用循环伏安法。研究了工作电极表面积、电极材料以及电位扫描速率对伏安氧化还原特性的影响。我们讨论了在火焰等离子体电解质中测量的法拉第电流峰的物理起源，并提出了一个简单的模型来描述发生的氧化还原过程。我们的结论是，在固-气界面的氧化还原过程实际上是类似的固-液界面由传统的电化学理论所描述的类似过程，偏离主要是由于在气相中占主导地位的传质过程。我们将迁移效应与完全不存在任何氧化过程相关联。
In this paper we present detailed dynamic electrochemical measurements in a flame plasma electrolyte in the presence of tungsten oxide salts. Defined reproducible redox processes are measured using conventional cyclic voltammetry in an operational potential window between 1 and -9 V. This wide potential window is possible due to the absence of solvent and its associated limits due to solvent electrolysis at high over potentials. The measurements were enabled through the development of a new reference electrode, composed of yttria stabilised zirconia (YSZ) which maintains a stable potential at 1100 K. In this paper we focus on developing a phenomenological understanding of electron transfer at the solid-gas interface, using cyclic voltammetry. The effect of working electrode surface area and material, as well as potential scan rate on the voltammetric redox features is presented. We discuss the physical origin of the observed Faradaic current peaks measured in a flame plasma electrolyte, and propose a simple model to describe the redox processes occurring. We conclude that redox processes at the solid-gas interface are actually similar to the analogous processes at the solid-liquid interface described by conventional electrochemical theory; the departures are mainly due to the mass transport processes that dominate in the gas phase. We associate migration effects with the total absence of any oxidation processes.
影响因子：
2.1
作者：
Hadzifejzovic E
通讯作者：
Hadzifejzovic E
影响因子：
8.4
作者：
D. Sarantaridis;C. Hennig;D. Caruana
通讯作者：
D. Sarantaridis;C. Hennig;D. Caruana