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应用扩展X射线精细结构(EXAFS)技术研究了化学改性MnO_2中锰及铋的结构形态.结果表明:掺杂元素铋进人MnO_2的晶格,增大MnO_2的不同壳层配位无定形.在MnO_1一电子放电还原过程中,铋的氧化态保持稳定.MnO_2没有发生结构重排.
The structure of manganese and bismuth in chemically modified MnO2 was studied by means of extended x-ray fine structure (EXAFS) technique. The results show that the bismuth doped into the crystal lattice of MnO 2 increases the amorphous coordination of different shell of MnO 2. During the reduction of MnO 1 by one electron discharge, the oxidation state of bismuth remained stable and no structural rearrangement occurred in MnO 2.