论文部分内容阅读
设计了一种由2个石墨电极短路相连组成工作电极的新的电化学池装置。操作时首先通过外力按压使极少量固体微粒粘附在其中一个石墨电极表面上,然后在溶液存在下将微粒夹紧并固定在2个石墨电极表面之间进行电化学测定。电化学转化过程中生成的可溶性物质被封闭在2个石墨电极表面之间而得到测定。用该技术对钯沉积在氧化铝上而组成的催化剂的电化学行为以及黄铁矿的电化学行为进行了研究。结果表明,其兼具可电解粘合剂碳糊电极和固体微粒伏安法(voltammetry of microparticles)技术的优点而避免了各自的缺点:即不使用粘合剂,从而消除了粘合剂中杂质产生的氧化或还原电流的影响;可测定电化学转化过程中生成的可溶性物质;分辨率好、易于操作。
A new electrochemical cell with a working electrode composed of two graphite electrodes short-circuited was designed. In operation, a very small amount of solid particles are first adhered to the surface of one of the graphite electrodes by an external force, and then the particles are clamped and fixed between two graphite electrode surfaces in the presence of a solution for electrochemical determination. Soluble material generated during electrochemical conversion was measured between two graphite electrode surfaces. The electrochemical behavior of the catalyst composed of palladium deposited on alumina and the electrochemical behavior of pyrite were investigated using this technique. The results show that it combines the advantages of the electrolytically-bondable carbon paste electrode and the voltammetry of microparticles technique without the respective disadvantages of not using a binder and thereby eliminating the need for impurities in the binder Resulting in oxidation or reduction current; can be measured during the electrochemical conversion of soluble substances generated; resolution, easy to operate.