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標題: CuPtCl6修飾網版印刷電極在放氫反應與分析偵測之研究
The Preparation and Application of CuPtCl6-modified Screen Printed Electrode in Hydrogen Evolution and Chemical Analysis
作者: 許修銘
關鍵字: CuPtCl6;hydrogen evolution;nitrite;fuel cell
出版社: 化學系
本論文中,我們以CuPtCl6修飾網版印刷電極於pH 7.0 的KCl溶液中配合循環伏安法偵測nitrite,實驗中分別探討溶液酸鹼值效應、長膜條件、電極表面行為等。最後以最佳化條件,得到對於偵測nitrite的線性範圍為 2 ~ 800 mM,偵測極限則為29 nM (S/N=3)。而在對於真實樣品的偵測上,以中興大學中興湖湖水做為樣品,測得湖中nitrite濃度為217.4 mM。同時於回收率上亦有不錯的表現。

Petrifaction fuels such as coal and petroleum were irreplaceable catalyst in the processes of making human civilization to progress and to develop since the industrial revolution had been begun. The progress of science and technology push economic activities to develop rapidly and make human life abundant. All countries in the world have used a large number of natural resources that are unable to revive in quest of industrialization and economic advancement. Nowadays we should pay for the high modernization because of constantly abusing natural resources. It is unavoidable to refer that those prices for abuse become human beings' heavy burdens. For example, the materials such as nitrite, oxysulfide and CO2 which are produced by a traditional thermal power plant's operation affect and change universal ecology, environment and climate to some extent. As a result, trying to increase the efficiency of using energy and searching for new alternative power sources become the effective rules of solving ecological imbalance nowadays. Among all, The “Fuel Cell” technology is a kind of method to generate electric power that brings to little environmental pollution but highly efficiency to get power. This technology is viewed as a practicable policy to solve the problems of environments and energy. However, it is often to see that using platinum electrode as an electrical catalyst in series of the “Fuel Cell” technology. It is not only high-priced but also easy to occur poisonous phenomenon resulted from reacting with CO in course of firing that leads to decline functions of generating electric power. Therefore, developing and researching the appropriate and convenient electrical catalyst is an important study direction.
In the processes of research, we found that using the chemically modified method to embellish the function of CuPtCl6 on the screen printed electrode so that it works in the hydrogen evolution reaction and the efficient hydrogen is available. By means of experimental evidences, we suggest that a kind of new hydrogen evolution experiments which have some advantages such as stability, high efficiency and a long life-span of using. This thesis is aimed to research and discuss about the new material as above. We expect to reduce the cost of using electrode substantially, and then to replace platinum electrode or even to connect with hydrogen-stored materials to store up hydrogen. The screen printed electrode can change its shapes of electrode depending on different needs. And even to develop various kinds of fuel cell battery electrode in order to suit for different batteries.
In addition, it's unexpected in the processes of experiments to find that CuPtCl6 on the screen printed electrode acquires the perfect performance on applications of biochemistry, environment and chemical study. Hence, we take nitrite for example to discuss on this thesis. “Nitrite”─a kind of multipurpose and distributed-extensively element─is often seen in preservative of foods, eutrophication of lake, human saliva and the like. The documents show that an adult who weigh 60 kilograms absorb the nitrite that the quantity should be less than eight milligrams. If taking beyond the limits, you'll catch the gastric cancer. As a result, setting up a series of efficient and correct methods to analyze and to detect is a key point that analytical chemists work hard.
According to this thesis, we used CuPtCl6-modified screen printed electrode in the pH 7.0 of KCl solution and used the cyclic voltammetry to detect nitrite. The details are about the reaction of solution's pH value, the conditions of film formation, the phenomenon of electrode's surface and so on. After detecting in the best conditions, the result of the linear range of nitrite is 2 to 800 mM and the limit of detection is 29 nM (S/N=3). In addition, taking water of Chung-hsing lake in National Chung Hsing University as a real sample of detection, and then the concentration of nitrite is found as 217.4 mM. Meanwhile, the value of recovery is good, too.
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