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用XPS研究了标称四价铈盐系列:硫酸铈铵、硫酸铈 、二苯基羟乙酸铈、碘酸铈、过氧化铈、二氧化铈以及三价铈盐系列:草酸亚铈、硫酸亚铈、二苯基羟乙酸亚铈、碘酸亚铈和氯化亚铈.结果表明,上述标称四价铈盐都属于混合价化合物,其Ce3d电子能谱呈现Ce~(4+)和Ce~(3+)的二组谱线结构的混合.在真空中加热后CeO_2的Ols电子能谱有两个氧峰,这说明 Ce(4f~0)O(2p~π)←→Ce(4f~1)O(2p~(π-1))类型价态波动的可能性较大.三价铈盐的3d谱线的低结合能端约3.5—4eV处则存在摔落伴峰.
The nominal tetravalent cerium salts series were studied by XPS: cerium ammonium sulfate, cerium sulfate, cerium diphenylacetate, cerium iodate, cerium peroxide, cerium oxide and trivalent cerium salt series: cerium oxalate, Cerium, cerium diphenylacetoacetate, cerous iodate and cerous chloride.The results show that the above nominal tetravalent cerium salts all belong to the mixed valence compounds, and the Ce3d electron spectra show Ce 4+ and Ce ~ (3+) .However, there are two oxygen peaks in the Ols electronic spectra of CeO 2 after heating in vacuum, which shows that Ce (4f 0) O (2p ~ π) ← → Ce ~ 1) O (2p ~ (π-1)) is more likely to occur in the valence state of the valence band of the trivalent cerium salt.