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

• DOI: 10.1021/acs.accounts.5b00170
• Publication Date: 2015-07-16T15:38:54Z
• Authors: Jeong Young Park; Sun Mi Kim; Hyosun Lee; Ievgen I. Nedryga...
• Keywords: Exothermic reaction

Energy dissipation at surfaces and interfaces is mediated by excitation of elementary processes, including phonons electronic excitation, once external energy deposited to the surface during exothermic chemical processes. Nonadiabatic in catalytic reactions results flow energetic electrons with an 1-3 eV when converted electron on a short (femtosecond) time scale before atomic vibration adiabatically dissipates (in picoseconds). These that are not thermal equilibrium metal atoms called "hot electrons". The detection hot under or molecular processes understanding its role have been major topics chemistry. Recent studies demonstrated produced surfaces, influence We outline research efforts aimed identification intrinsic relation between reactions. show various strategies for use generated photon absorption. A Schottky barrier localized metal-oxide interface either nanodiodes hybrid nanocatalysts allows irreversibly transport through interface. chemicurrent, composed excited reaction CO oxidation hydrogen oxidation, correlates well turnover rate measured separately gas chromatography. Furthermore, we flows gold thin film absorption (or internal photoemission) can be amplified plasmon resonance. charge carriers chemistry discussed cases Au, Ag, Pt nanoparticles oxide supports Pt-CdSe-Pt nanodumbbells. accumulation depletion nanoparticles, turn, also Mechanisms suggested hot-electron-induced photoexcited plasmonic discussed. propose manipulation changing electrical characteristics metal-semiconductor give rise intriguing capability tuning activity nanocatalysts.