期刊
APPLIED SURFACE SCIENCE
卷 165, 期 4, 页码 288-302出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0169-4332(00)00443-8
关键词
XPS; sulfur; iron; oxidation state; chemical environment; pyrite
This paper presents a report on the XPS coherent binding energy (BE) data basis for iron and sulfur reference compounds that are representative of oxidation products formed onto the pyrite reactive surface. This work is unique for various reasons: (1) no recent (published after 1980) BE data basis with similar normalization method has been found in the literature; (2) the coupling of data collected from Fe and S photoelectron peaks and from charge transfer satellites of Fe allows for the simultaneous determination of the oxidation state and chemical environment; (3) the depth heterogeneities of samples can be taken into account by comparing the data obtained with Fe2p and Fe3p peaks, whose associated BEs are widely divergent. In the second part of the paper, the data in BEs obtained from reference compounds have been exploited to show the surface species of an oxidized pyrite in a HCO3- medium (10(-2) M). (C) 2000 Elsevier Science B.V. All rights reserved.
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