气候变化领域集成服务门户(CCPortal): Real-time observation of surface bond breaking with an X-ray laser

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DOI	10.1126/science.1231711
	Real-time observation of surface bond breaking with an X-ray laser
	Dell'Angela M.; Anniyev T.; Beye M.; Coffee R.; Föhlisch A.; Gladh J.; Katayama T.; Kaya S.; Krupin O.; LaRue J.; Møgelhøj A.; Nordlund D.; Nørskov J.K.; Öberg H.; Ogasawara H.; Öström H.; Pettersson L.G.M.; Schlotter W.F.; Sellberg J.A.; Sorgenfrei F.; Turner J.J.; Wolf M.; Wurth W.; Nilsson A.
发表日期	2013
ISSN	0036-8075
起始页码	1302
结束页码	1305
卷号	339 期号:6125
英文摘要	We used the Linac Coherent Light Source free-electron x-ray laser to probe the electronic structure of CO molecules as their chemisorption state on Ru(0001) changes upon exciting the substrate by using a femtosecond optical laser pulse. We observed electronic structure changes that are consistent with a weakening of the CO interaction with the substrate but without notable desorption. A large fraction of the molecules (30%) was trapped in a transient precursor state that would precede desorption. We calculated the free energy of the molecule as a function of the desorption reaction coordinate using density functional theory, including van der Waals interactions. Two distinct adsorption wells - chemisorbed and precursor state separated by an entropy barrier - explain the anomalously high prefactors often observed in desorption of molecules from metals.
英文关键词	carbon monoxide; adsorption; carbon monoxide; chemical bonding; desorption; entropy; laser; metal; observational method; real time; X-ray spectroscopy; adsorption; article; density functional theory; desorption; entropy; femtosecond laser; fluorescence spectroscopy; laser; priority journal; spectroscopy; X ray; X ray absorption spectroscopy; x ray emission spectroscopy
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243506
作者单位	University of Hamburg, Center for Free Electron Laser Science, Luruper Chausse 149, D-22761 Hamburg, Germany; Stanford Institute for Materials Energy Sciences (SIMES), SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, United States; Institute for Methods and Instrumentation in Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Wilhelm-Conrad-Röntgen Campus, Albert-Einstein-Strasse 15, 12489 Berlin, Germany; Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, United States; Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany; Department of Physics, AlbaNova University Center, Stockholm University, SE-10691, Sweden; European X-Ray Free Electron Laser (XFEL) GmbH, Albert-Einstein-Ring 19, 22761 Hamburg, Germany; Sustainable Energy Through Catalysis (SUNCAT), Center for Interface Science and Catalysis, SLAC National Accelera...
推荐引用方式 GB/T 7714	Dell'Angela M.,Anniyev T.,Beye M.,et al. Real-time observation of surface bond breaking with an X-ray laser[J],2013,339(6125).
APA	Dell'Angela M..,Anniyev T..,Beye M..,Coffee R..,Föhlisch A..,...&Nilsson A..(2013).Real-time observation of surface bond breaking with an X-ray laser.Science,339(6125).
MLA	Dell'Angela M.,et al."Real-time observation of surface bond breaking with an X-ray laser".Science 339.6125(2013).