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The Bi-Ni and Bi-Ni-Mn composite is separately coated on the surface of commercial electrolytic manganese dioxide (EMD) by using a simple chemical precipitation/oxidation method. The results of X-ray diffraction show that a structure of γ-MnO2 is kept for all the coated EMD, but the intensity of their diffraction peaks is lower than uncoated one. Both the Bi0.5-Ni0.5 and Bi0.35-Ni0.35-Mn0.3 composite...
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