Electrochemical formation of diamond

金刚石具有电绝缘体和超高硬度材料等独特的性能，不仅在珠宝中发挥着更大的作用，而且在工业上也发挥着更大的作用。电化学法合成金刚石的反应为：C_2^&lt；2-&gt；→2C+2e^-。特别是考察了外加电势对碳形态和成炭初期的影响。在高于2.4V的正电位下，在Au丝上获得了多面体形状的碳。用拉曼光谱确定了碳的多面体形状为金刚石。计时电流法和扫描电子显微镜观察结果表明，双层充电和成炭是同时发生的。

Diamond has discriminative properties, such as electrical insulator and super high hardness material, and diamond plays a greater role not only in jewelry but also in industrial use. Electrochemical formation of diamond has been developed by anodic reaction of carbide ion according to the reaction: C_2^<2-> → 2C + 2e^-. In particular, the effects of applied potential on the carbon morphology and the initial stage of carbon formation were investigated. Polyhedral shape of carbon was obtained at more positive potential than 2.4 V on Au wire. The polyhedral shape of carbon was determined as diamond by Raman spectroscopy. Results of chronoamperometry and SEM observation implied that double layer charging and carbon formation occur simultaneously.