气候变化领域集成服务门户(CCPortal): The structure of interfacial water on gold electrodes studied by x-ray absorption spectroscopy

CCPortal

DOI	10.1126/science.1259437
	The structure of interfacial water on gold electrodes studied by x-ray absorption spectroscopy
	Velasco-Velez J.-J.; Wu C.H.; Pascal T.A.; Wan L.F.; Guo J.; Prendergast D.; Salmeron M.
发表日期	2014
ISSN	0036-8075
起始页码	831
结束页码	834
卷号	346 期号:6211
英文摘要	The molecular structure of the electrical double layer determines the chemistry in all electrochemical processes. Using x-ray absorption spectroscopy (XAS), we probed the structure of water near gold electrodes and its bias dependence. Electron yield XAS detected at the gold electrode revealed that the interfacial water molecules have a different structure from those in the bulk. First principles calculations revealed that -50% of the molecules lie flat on the surface with saturated hydrogen bonds and another substantial fraction with broken hydrogen bonds that do not contribute to the XAS spectrum because their core-excited states are delocalized by coupling with the gold substrate. At negative bias, the population of flat-lying molecules with broken hydrogen bonds increases, producing a spectrum similar to that of bulk water.
英文关键词	gold nanoparticle; water; chemical bonding; electrode; gold; hydrogen; molecular analysis; substrate; X-ray spectroscopy; Article; chemical structure; electrode; hydrogen bond; structure analysis; surface property; X ray absorption 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/245839
作者单位	Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Department of Chemistry, University of California, Berkeley, CA 94720, United States; Joint Center for Energy Storage Research, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064, United States; Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, United States
推荐引用方式 GB/T 7714	Velasco-Velez J.-J.,Wu C.H.,Pascal T.A.,et al. The structure of interfacial water on gold electrodes studied by x-ray absorption spectroscopy[J],2014,346(6211).
APA	Velasco-Velez J.-J..,Wu C.H..,Pascal T.A..,Wan L.F..,Guo J..,...&Salmeron M..(2014).The structure of interfacial water on gold electrodes studied by x-ray absorption spectroscopy.Science,346(6211).
MLA	Velasco-Velez J.-J.,et al."The structure of interfacial water on gold electrodes studied by x-ray absorption spectroscopy".Science 346.6211(2014).