Hot-Electron-Mediated Surface Chemistry: Toward Electronic Control of Catalytic Activity

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• 作者：Jeong Young Park ; Sun Mi Kim ; Hyosun Lee ; Ievgen I. Nedrygailov
• 刊名：Accounts of Chemical Research
• 出版年：2015
• 出版时间：August 18, 2015
• 年：2015
• 卷：48
• 期：8
• 页码：2475-2483
• 全文大小：501K
• ISSN：1520-4898

文摘

Energy dissipation at surfaces and interfaces is mediated by excitation of elementary processes, including phonons and electronic excitation, once external energy is deposited to the surface during exothermic chemical processes. Nonadiabatic electronic excitation in exothermic catalytic reactions results in the flow of energetic electrons with an energy of 1鈥? eV when chemical energy is converted to electron flow on a short (femtosecond) time scale before atomic vibration adiabatically dissipates the energy (in picoseconds). These energetic electrons that are not in thermal equilibrium with the metal atoms are called 鈥渉ot electrons鈥? The detection of hot electron flow under atomic or molecular processes and understanding its role in chemical reactions have been major topics in surface chemistry. Recent studies have demonstrated electronic excitation produced during atomic or molecular processes on surfaces, and the influence of hot electrons on atomic and molecular processes.