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首页> 外文期刊>Journal of Materials Science and Chemical Engineering >Electrochemical Study of Redox Reaction of Various Gold III Chloride Concentrations in Acidic Solution
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Electrochemical Study of Redox Reaction of Various Gold III Chloride Concentrations in Acidic Solution

机译：酸性溶液中不同浓度的金三氯化物氧化还原反应的电化学研究。

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The redox reaction of gold III chloride in acid solutions has been electro-chemically investigated using a cyclic voltammetry technique. This paper emphasizes the current and potential sites at which gold III chloride is reduced in hydrochloric acid that is vital to electrochemical evaluation of gold recovery. The solutions were prepared by reacting HCl with AuCl3 in various concentrations thus 30 and 60 mg/L AuCl3 in 0.1 and 0.5 M HCl, respectively. Solutions of 0.1 and 0.5 M HCl containing 0, 30 and 60 mg/L AuCl3, respectively were tested for possible reduction and oxidation reactions by cyclic voltammogram experiment using a glassy carbon, a saturated calomel and a platinum wire mesh as working, reference and counter electrodes, respectively. The results showed no peak in the case of the absence of AuCl3 in the solutions, but appreciable cathodic and anodic peaks for the reduction and oxidation of various concentrations of AuCl3 in acid solutions. The reaction between AuCl3 and HCl was found to be reversible because the ratio of oxidation peak current and reduction peak current was 1. The concentration of style="white-space:normal;">AuCl-4 on the surface of the working electrode at the reduction site for each AuCl3 concentration using Nernst equation was 1.22 × 109 ppm and 2.44 × 109 ppm. The reduction potentials were independent of concentration, while the current was highly dependent of concentration.
机译：已使用循环伏安法对三氯化金在酸性溶液中的氧化还原反应进行了电化学研究。本文重点介绍了在盐酸中还原III型氯化金的当前和潜在位点，这对电化学评估金的回收率至关重要。通过使HCl与各种浓度的AuCl 3 反应，从而分别在0.1和0.5 M HCl中使30和60 mg / L AuCl 3 反应来制备溶液。通过使用玻璃碳，饱和甘汞和铂的循环伏安法实验，分别测试了0.1和0.5 M HCl分别包含0、30和60 mg / L AuCl 3 的溶液的可能的还原和氧化反应。丝网分别作为工作电极，参比电极和对电极。结果表明，在溶液中不存在AuCl 3 的情况下没有峰，但是在不同浓度的AuCl 3 的还原和氧化中有明显的阴极和阳极峰。酸性溶液。发现AuCl 3 与HCl之间的反应是可逆的，因为氧化峰电流与还原峰电流之比为1。 style =“ white-space：normal;”> AuCl的浓度使用Nernst方程，对于每个AuCl 3 浓度，还原电极上工作电极表面还原位置上的- 4 均为1.22×10 9 ppm和2.44×10 9 ppm。还原电位与浓度无关，而电流与浓度高度相关。

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