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本文目的在于研究LaNi_5H_4氢化物表面性质和吸氢能力同其制备条件的依赖关系,样品的极化作用是在含有7 mol/L KOH溶液的电池中进行的,用氧化亚汞做参比电极,样品的恒定电流曲线是在P-5848型电位计上扫描的,合金粉末放入一特制多孔Ni金属槽经氧极-阴极极化处理,经6～8次极化循环可测得吸氢能力的稳定最大值,根据所得电流曲线,还测得了活性比表面和电化学极化过程中氢化物的稳定性。
The purpose of this paper is to study the dependence of the surface properties and hydrogen absorption capacity of LaNi_5H_4 hydride on its preparation conditions. The polarization of the sample is carried out in a battery containing 7 mol / L KOH solution. Mercury oxide as the reference electrode, The constant current curve of the sample was scanned on a P-5848 Potentiometer. The alloy powder was put into a special porous Ni metal tank and subjected to oxygen-cathode polarization treatment. The hydrogen absorption capacity was measured after 6 to 8 cycles of polarization According to the obtained current curve, the stability of the hydride during the specific surface and electrochemical polarization was also measured.