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本文研究了LaNi_4MH_n(M=Ni,Fe,Cu。n≥3)与水中溶氧的反应。在氢过量(≥30倍)下,测定了不同温度下水中溶氧浓度与反应时间的关系。结果表明,在25～55℃范围内都能定量地消除水中溶氧。对氧为一级反应,表观动力学方程为-d[O_2]/dt=K[O_2]。反应速率大小顺序是LaNi_5H_n>LaNi_4MnH_n>LaNi_4FeH_n>LaNi_4CuH_n,对于同一种物质来说,合成方法不同,反应速率也不同,如LaNi_4FeH_n(化学合成)>LaNi_4FeH_n(熔炼制备)。
In this paper, the reaction of LaNi_4MH_n (M = Ni, Fe, Cu.n≥3) with dissolved oxygen in water was studied. Under hydrogen excess (≥30 times), the relationship between dissolved oxygen concentration and reaction time under different temperatures was determined. The results show that in the range of 25 ~ 55 ℃ can quantitatively eliminate dissolved oxygen in water. Oxygen is a first order reaction, the apparent kinetic equation is -d [O 2] / dt = K [O 2]. The order of the reaction rate is LaNi_5H_n> LaNi_4MnH_n> LaNi_4FeH_n> LaNi_4CuH_n. For the same species, the synthesis method is different and the reaction rate is also different, for example, LaNi_4FeH_n> LaNi_4FeH_n (melting preparation).