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采用熔盐电脱氧法,由MnO2和ZrO2混合氧化物直接合成ZrMn2合金。研究烧结温度、电解电压及电解时间等工艺参数对产物组成的影响。在900°C的CaCl2熔盐中,经900°C烧结的混合氧化物阴极在3.1 V恒电压下电解12 h,可制备出纯相的ZrMn2合金。XRD和循环伏安结果表明,在电解过程中,Mn-O化合物首先还原成单质Mn,ZrO2和CaZrO3再在单质Mn表面还原,并与其合金化,形成ZrMn2合金。以粉末微电极为工作电极,循环伏安测试结果表明,所制备的ZrMn2合金表现出良好的电化学储氢性能。
The molten salt deoxidation method was used to synthesize ZrMn2 alloy directly from MnO2 and ZrO2 mixed oxides. The effects of sintering temperature, electrolysis voltage and electrolysis time on the composition of the product were studied. In 900 ℃ CaCl2 molten salt, the mixed oxide cathode sintered at 900 ° C was electrolyzed at a constant voltage of 3.1 V for 12 h to prepare pure phase ZrMn2 alloy. The results of XRD and cyclic voltammetry show that during electrolysis, Mn-O compounds are reduced to elemental Mn, ZrO2 and CaZrO3 first and then reduced on the surface of elemental Mn and alloyed with them to form ZrMn2 alloy. Using the powder microelectrode as the working electrode, cyclic voltammetry results show that the prepared ZrMn2 alloy exhibits good electrochemical hydrogen storage performance.