【材料科學系列講座21】
報告題目：非線性光譜電化學方法對電化學界面結構與動力學的研究
報告人：仝玉進
主持人（邀請人）： 蔣青 教授
報告時間：7月22日15:00-16:00
報告地點：機械材料館209學術報告廳
主辦單位：汽車材料教育部重點實驗室，伟德bv1946官网
摘要：
Electric double layer is the key component of electrochemistry, where reactants, products, ions and solvents follow certain spatial distribution at the interface. Currently the most accepted model is the Gouy-Chapman-Stern model (left panel of Figure 1), in which the interface has been divided into three region: the inner Helmholtz plane, where solvent and specific anions adsorb directly to the electrode; the outer Helmholtz plane, where solvated cations present; and the diffuse layer, where ions follow Poisson- Boltzmann distribution. However, this model is depicted based essentially on the thermodynamic measurements, i.e. the electrocapillary curve, surface excess, differential capacitance, etc. The molecular level information is still insufficient. Many of the recent observations cannot be explained by this qualitative model. For example, why different ions can affect the efficiency and selectivity of CO2 reduction? To gain such information, we have to directly probe the molecules and ions in the electric double layer. This is what we are doing in our group. A few examples are shown in the right panel of Figure 1. With VSFS, we have successfully probed the bias dependent structure of adsorbates on gold electrode, the chemical and physical nature of sulfate anions on Pt(111) surface. In addition, with the ultrashort lasers we were also able to investigate the dynamics of electrochemical processes, such as electron solvation on femto-second time scales. Based on these studies, a spectroscopic tool which can be employed to measured local electric field at electrochemical interfaces have also been reviewed.
報告人簡介：
仝玉進， 本科（2003）碩士（2005）畢業于哈爾濱工業大學，2010 年博士畢業于日本北海道大學催化研究中心。現任德國杜伊斯堡大學物理系研究員，前馬普學會Fritz Haber 研究所“非線性光譜電化學研究組”課題組長，留德化學化工學會(CGCA)前理事長（2016-2018），國際電化學會，德國物理學會會員，Ertl電化學和催化中心的會員。多年來緻力于先進表面科學表征方法的開發和應用，特别是成功将非線性激光光譜技術應用在電化學界面的檢測上。得到國際同行的廣泛關注和認可。以第一或通訊作者身份，在Nat. Comm., Angew. Chem. Int.,以及 Ed., J. Am. Chem. Soc. 等國際主流學術期刊上發表研究論文60餘篇。獲邀評審法國國家科研署（ANR）經費項目，為國際知名刊物Nature系列，美國化學會刊物，德國化學會等期刊審稿人。他經常應邀在國際學術會議上做重要報告。此外，他還經常牽頭組織中德之間的各種學術和科技交流活動。
