EFFECTS OF ANODIC-OXIDATION ON THE SURFACE-STRUCTURE OF HIGHLY ORIENTED PYROLYTIC-GRAPHITE REVEALED BY IN-SITU ELECTROCHEMICAL SCANNING-TUNNELING-MICROSCOPY IN H2SO4 SOLUTION

	EFFECTS OF ANODIC-OXIDATION ON THE SURFACE-STRUCTURE OF HIGHLY ORIENTED PYROLYTIC-GRAPHITE REVEALED BY IN-SITU ELECTROCHEMICAL SCANNING-TUNNELING-MICROSCOPY IN H2SO4 SOLUTION
	ZHANG BL ; WANG EK
刊名	electrochimica acta
	1995
卷号	40 期号:16 页码:2627-2633
关键词	TUNNELING-MICROSCOPY ELECTRON-TRANSFER IMAGES DEFECTS CARBON MICROSTRUCTURE INTERCALATION CORRUGATIONS BOUNDARIES ACTIVATION
ISSN号	0013-4686
中文摘要	effects of the potential of anodic oxidation and of potential cycling on the surface structure of a highly oriented pyrolytic graphite (hopg) electrode were observed by in situ electrochemical scanning tunnelling microscopy (ecstm) in dilute h2so4 solution with atomic resolution. with potential cycling between -0.1 v and 1.8 v vs. ag/agcl (sat. kci), some atoms on the top layer of hopg protrude out of the base plane, and the graphite lattice of these protrusions is still intact but is strained and expanded. with further potential cycling, some protrusions coalesced and some grew larger, and an anomalous superperiodic feature was observed (spacing 90 angstrom with a rotation 30 degrees relative to atomic corrugations) which superimposed on the atomic corrugation of hopg. on the topmost of these protrusions, some atoms form oxides and others are still resolved by the ecstm image. with potential cycling between -0.1 v and + 2.0 v vs. ag/agcl (sat. kcl), damage to freshly cleaved hopg surface is more serious and fast, some ridges are observed, the atomic structure of the hopg surface is partially and then completely damaged due to the formation of oxide. we also found that anodic oxidation occurred nonuniformly on the surface of hopg near defects during potential cycling.
收录类别	SCI收录期刊论文
语种	英语
公开日期	2010-12-30 ; 2011-06-10
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/26409]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	ZHANG BL,WANG EK. EFFECTS OF ANODIC-OXIDATION ON THE SURFACE-STRUCTURE OF HIGHLY ORIENTED PYROLYTIC-GRAPHITE REVEALED BY IN-SITU ELECTROCHEMICAL SCANNING-TUNNELING-MICROSCOPY IN H2SO4 SOLUTION[J]. electrochimica acta,1995,40(16):2627-2633.
APA	ZHANG BL,&WANG EK.(1995).EFFECTS OF ANODIC-OXIDATION ON THE SURFACE-STRUCTURE OF HIGHLY ORIENTED PYROLYTIC-GRAPHITE REVEALED BY IN-SITU ELECTROCHEMICAL SCANNING-TUNNELING-MICROSCOPY IN H2SO4 SOLUTION.electrochimica acta,40(16),2627-2633.
MLA	ZHANG BL,et al."EFFECTS OF ANODIC-OXIDATION ON THE SURFACE-STRUCTURE OF HIGHLY ORIENTED PYROLYTIC-GRAPHITE REVEALED BY IN-SITU ELECTROCHEMICAL SCANNING-TUNNELING-MICROSCOPY IN H2SO4 SOLUTION".electrochimica acta 40.16(1995):2627-2633.