| 摘要: | 我們的研究興趣主要在應用電化學於能源、半導體加工、高分子材料等。在過去的十年裡, 我們目睹了人們對電催化、銅電沉積、苯胺、吡咯和噻嗪的研究大幅進展。一些表面敏感的技術已經用來研究具良好結構的帶電介面。掃描探頭的優點是可以即時和實地洞察電極表面結構的隨電位改變。多年來我們一直在使用這種技術來檢測帶電的介面, 這對於電化學在催化、氫氧氣產生、有機半導體、感應器等方面的應用非常重要。此外, 我們還在工具箱中添加了一個新工具--振動光譜儀, 它有助於識別帶電介面上的有機吸附物。鉑以其對許多電化學的電活動而聞名。他可促進氫氧產生、甲醇氧化和氧還原反應等一系列電化學反應。這些氧化還原反應對燃料電池的運行至關重要。然而, 鉑金屬的高成本是發展燃料電池商業化的主要障礙之一。因此, 減少電催化劑中的鉑用量或尋找廉價的催化劑是繞過這一障礙的主要策略。除了電催化劑的化學成分外, 電催化劑表面的原子排列也會影響其活性，但如何暴露一最好的晶面是現今的納米金屬粒子的製備及其催化活性的研究重要課題。硬幣金屬特別是銅,由於其獨特的電化學性能最近引起了極大的關注, 因為它們可以催化二氧化碳的還原產生有機小分子。我們設計了一種製備銅單晶珠電極的方法, 它允許研究人員製作出具有明確結構和組成的銅電極。雖然鎳本身對甲醛的氧化沒有活性, 但我們注意到, 銅電極中只有1% 的鎳能使甲醛的氧化率提高12倍。我們將繼續探索銅及其合金電極的電化學特性和電催化。 ;My research activity has focused on the applications of electrochemistry to energy, semiconductor processing, polymeric materials etc. In the last decade we have witnessed the surge of research interest toward electrocatalysis, electrodeposition of copper, electropolymerization of aniline, pyrrole and thiophene. The well-defined electrified interfaces have been approached with a number of surface – sensitive techniques. Scanning probes have the advantages of providing insights into the structures of electrode surface in a real-time and real-space manner. We have been using this technique to examine electrified interfaces, which are important to the applications of electrochemistry in catalysis, evolution of hydrogen and oxygen, organic semiconductors, sensors etc. In addition, we have added a new tool in our toolbox – vibration spectroscopy, which is useful to identify organic adsorbates at electrified interface. Pt is renowned for its electroactivities toward a number of electrochemical reactions, such as hydrogen evolution and oxidation, oxidation of methanol, and oxygen reduction reaction. These redox reactions are essential to the operation of fuel cells. However, the high cost of Pt metal is one of the main impediments to the commercialization of Pt-based fuel cells. Therefore, reducing the Pt loading in the electrocatalyst or finding inexpensive alternatives are the chief strategies to bypass this obstacle. Besides the chemical composition of an electrocatalyst, the atomic arrangement of the surface of an electrocatalyst also influences its activity. Fabrication of nanoscale metallic entities and study of their catalytic activities have been one of the frontiers in the modern aspects of nanotechnology. Coin metals, owing to their unique electrochemical properties, especially Cu, have attracted a great of attention recently, as they can catalyze the reduction of carbon dioxide to small organic molecules. We have devised a method to prepare Cu single crystal bead electrode, which allows researchers to make their own Cu electrodes with well-defined structure and composition. Although Ni itself has no activity toward oxidation of formaldehyde (OF), it is noted that only 1% Ni in a Cu electrode can boost the rate of OF by 12 times. We will continue to explore the electrochemical properties and electrocatalysis of Cu and its alloyed electrodes. |
