Salt matrix voltammetry: Microphase redox processes at ammonium chloride | gold | gas triple phase boundaries

Salt matrix voltammetry: Microphase redox processes at ammonium chloride | gold | gas triple phase boundaries
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盐基质伏安法:氯化铵的微相氧化还原过程|

DOI:
10.1016/j.elecom.2010.11.038
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发表时间:
2011
影响因子:
5.4
通讯作者:
Dale S
Dale S
中科院分区:
工程技术3区
文献类型:
--
作者:
Dale S

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电极上的电化学过程|氯化铵盐晶体|在以下条件下检测气体三相边界:(i)形成盐晶体与合适的工作电极的微观接触点,和(i i)调节相对湿度水平以允许盐基质内的薄水膜中有足够的表面离子传导。在这份初步报告中,氧化还原系统,如Fe(CN)63-/4-,氢醌/苯醌,十甲基二茂铁+/0,二茂铁二甲醇+/0,和Cu 2 +/+/0嵌入氯化铵盐基质(通过机械研磨),然后与宏观金盘电极接触进行了研究。伏安电流响应被证明是一致的过程中形成的微相在盐|电极|气三相界面观察到铜金属电沉积。气相分子氧在盐晶体上的直接电化学|观察到金电极接触,并提出了气体传感应用。
Electrochemical processes at the electrode | ammonium chloride salt crystal | gas triple phase boundary are detected under the condition that (i) microscopic contact points of salt crystals to a suitable working electrode are formed and (ii) the relative humidity level is adjusted to allow sufficient surface ion conduction in a thin water film within the salt matrix. In this preliminary report, redox systems such as Fe(CN)63−/4−, hydroquinone/benzoquinone, decamethylferrocene+/0, ferrocenedimethanol+/0, and Cu2+/+/0are investigated embedded into an ammonium chloride salt matrix (by mechanical grinding) and then brought into contact with a macroscopic gold disc electrode. Voltammetric current responses are demonstrated consistent with the processes in the microphase formed at the salt | electrode | gas triple phase boundary. Copper metal electro-deposition is observed. Direct electrochemistry of dioxygen from the gas phase at the salt crystal | gold electrode contact is observed and gas sensing applications are proposed.
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