| THE REDOX BEHAVIOR OF BISMUTH MOLYBDATES——AN XPS STUDY OF Ar~+ ION BOMBARDMENT INDUCED CHEMICAL EFFECT IN UHV |
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| 引用本文： | 蒋致诚,安立敦,陈正石,张兵,高玲,尹元根.THE REDOX BEHAVIOR OF BISMUTH MOLYBDATES——AN XPS STUDY OF Ar~+ ION BOMBARDMENT INDUCED CHEMICAL EFFECT IN UHV[J].中国科学B辑(英文版),1992(1). |
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| 作者姓名： | 蒋致诚 安立敦 陈正石 张兵 高玲 尹元根 |
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| 作者单位： | Lanzhou Institute of Chemical Physics，Academia Sinica，Lanzhou 730000，PRC，Lanzhou Institute of Chemical Physics，Academia Sinica，Lanzhou 730000，PRC，Lanzhou Institute of Chemical Physics，Academia Sinica，Lanzhou 730000，PRC，Lanzhou Institute of Chemical Physics，Academia Sinica，Lanzhou 730000，PRC，Lanzhou Institute of Chemical Physics，Academia Sinica，Lanzhou 730000，PRC，Lanzhou Institute of Chemical Physics，Academia Sinica，Lanzhou 730000，PRC Beijing Institute of Chemical Fibre Technology |
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| 基金项目： | Project supported by the National Natural Science Foundation of China |
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| 摘 要： | Ar~+ ion bombardment induced reduction effect on Bi_2O_3, MoO_3 and Bi-Mo complex oxides, α-Bi_2Mo_3O_(13), β-Bi_2Mo_2O_9, and γ-Bi_2MoO_6, has been studied with XPS. The results show that, owing to the presence of the oxygen anion bridge in Bi(Ⅲ)-O(Ⅱ)-Mo(Ⅵ), the reduction behavior of Bi(Ⅲ) and Mo(Ⅵ) metal ions in all the three complex oxides is contrary to that in the single oxides. While Mo(Ⅵ) in MoO_3 is reduced to Mo(Ⅵ) in UHV under Ar~+ ion bombardment, the valence state of Bi(Ⅲ) in Bi_2O_3 is unchanged. However, Bi(Ⅲ) in the three complex oxides is reduced to Bi(0) without noticeable reduction of Mo(Ⅵ). Nevertheless, the rates of Bi(Ⅲ) reduction are in correspondence with the difference in Bi/Mo atomic ratio and the crystallographic features of the three phases of bismuth molybdate are decreasing in the order of α-Bi_2Mo_3O_(12)≥β-Bi_2Mo_2O_9>γ-Bi_2MoO_6. A new O -species is observed on the bismuth molybdate surface reduced by Ar~+ ion bombardment.Wc discuss the above phenomena i
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