X-RAY PHOTOELECTRON STUDIES ON SOME OXIDES AND HYDROXIDES OF COBALT, NICKEL, AND COPPER
X-RAY PHOTOELECTRON STUDIES ON SOME OXIDES AND HYDROXIDES OF COBALT, NICKEL, AND COPPER
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DOI：
10.1021/ac60363a034
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发表时间：
1975-01-01
影响因子：
7.4
通讯作者：
COOK, MG
中科院分区：
文献类型：
--
作者：
MCINTYRE, NS;COOK, MG
本文研究了铜、镍和钴的简单氧化物和氢氧化物及混合氧化物的X射线光电子能谱，以确定能谱特征，从而鉴别各种物质。所研究的氧化物和氢氧化物是Cu 2 〇、CuO、Cu（OH）2、CuFe 2 〇 4、NiO、Ni（OH）2、NiFe 2 〇 4、CoO、Co2 〇 3、CoOOH、Cu（OH）2、CoAl 2 〇 4和CoFe 2 〇 4。这些金属的二价氧化物与类似的氢氧化物可以通过后者的金属芯线的明显较大的化学位移、卫星线的能量以及不同的0（1 s）线结合能来区分。铜（I）氧化物和铜（II）氧化物是可以区分的，因为在抗磁性的铜（I）氧化物中没有多电子激发卫星，钴（III）氧化物和钴（II）氧化物是可以区分的，因为前者中没有这种卫星。混合氧化物有时可以根据它们的卫星结构以及0（1 s）线能量来识别。本文还介绍了离子轰击镍金属表面产生氧化物的一些实验，并将X射线光电子能谱（XPS）用于鉴定不锈钢和其它富镍合金等材料的表面腐蚀产物。在某些含水条件下，金属氢氧化物可在这些合金上沉淀形成主要的表面腐蚀物种。在溶液pH或氧气浓度的其他条件下，表面层由简单或混合氧化物组成。由于其对表面化学结构的敏感性，XPS在腐蚀膜的表征中具有很大的潜在价值（1，2），但首先，必须彻底熟悉合金成分的氧化物和氢氧化物的XPS光谱;通常是铬，铁镍，铜和钴。铝-虽然这些过渡金属的一些个别氧化物的光谱已被报道，没有完整的和比较的研究，它们的氧化物和氢氧化物已进行。
X-Ray photoelectron spectra of some simple and mixed ox-ides and hydroxides of copper, nickel, and cobalt have been studied with a view to determining spectralcharacteristics to allow the identification of each species. Oxides and hydroxides studied were Cu20, CuO, Cu (OH) 2, CuFe204, NiO, Ni (OH) 2, NIFe204, CoO, Co203, CoOOH, Cu (OH) 2, CoAI204, and CoFe204. The divalent oxides of these metals can be distinguished from the analogous hydroxides by the distinctly larger chemical shift of the metal core lines for the latter, by the energies of the satellite lines, and by the different 0 (1s) line binding energies. Oxides of copper (l) and copper (ll) are distinguishable because of the lack of mul-tielectron excitation satellites In the diamagnetic copper (l) oxide, and cobalt (lll) oxides are distinguished from co-balt (ll) oxides by the absence of such satellites in the for-mer. Mixed oxides are sometimes identifiable on the basis of their satellite structure as well as the 0 (1s) line energy. Some experiments are also described involving oxide species produced on a nickel metal surface by ion bom-bardment.In this laboratory, X-ray photoelectronspectroscopy (XPS) is being applied to the identification of surface cor-rosion products on materials such as stainless steel and other nickel-rich alloys. Under some aqueous conditions, metal hydroxides can precipitate on these alloys to form the major surface corrosion species. Under other conditions of solution pH or oxygen concentration, the surface layer comprises simple or mixed oxides. Because of its sensitivity to chemical structure on surfaces, XPS is of great potential value in the characterization of corrosion films (1, 2) but, first, a thorough familiarity is necessary with the XPS spectra of the oxides and hydroxides of alloy constituents; typically chromium, iron nickel, copper, and cobalt. Al-though the spectra of some of the individual oxides of these transition metals have been reported, no complete and comparative study oftheir oxides and hydroxides has been undertaken.