Stabilisation of high dissociation pressure hydrides of formula La1−xCexNi5 (x=0–0.3) with carbon monoxide
Stabilisation of high dissociation pressure hydrides of formula La1−xCexNi5 (x=0–0.3) with carbon monoxide
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DOI：
10.1016/s0925-8388(98)00283-7
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发表时间：
1998-07
影响因子：
6.2
通讯作者：
S. Corre;M. Bououdina;D. Fruchart;G. Adachi
中科院分区：
文献类型：
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作者：
S. Corre;M. Bououdina;D. Fruchart;G. Adachi
我们以前已经证明了效率的CO和SO2表面处理的LaNi 5氢化物的稳定。处理后的样品室温下在空气中稳定。在这里，CO表面处理应用于较高的离解压力系统，La 1 − xCexNi 5（x=0，0.1，0.2和0.3）化合物。在273和298 K两个温度下研究了该化合物的稳定性。我们发现，CO处理的La 1 − xCexNi 5 O3的氢保留时间与未处理的La 1 − xCexNi 5 O3相比显著改善。然而，对于这两个温度，氢在处理过的铈的保留时间被发现减少与增加铈含量。结果解释的基础上进行的P-C-T测量在室温下。正如预期的那样，吸氢和放氢压力和滞后随铈含量增加而增加。CO处理后合金的脱氢动力学与合金中的铈含量有关。
We have previously demonstrated the efficiency of CO and SO2surface treatments for the stabilization of the LaNi5hydride. The as-treated hydrides were stable in air at room temperature. Here, CO surface treatment is applied to higher dissociation pressure systems, La1−xCexNi5(x=0, 0.1, 0.2 and 0.3) compounds. Stabilization of the hydrides is studied at two temperatures, 273 and 298K. We found that the hydrogen retention time for CO-treated La1−xCexNi5hydrides is dramatically improved compared with that of untreated hydrides. Nevertheless, for both temperatures, the hydrogen retention time in treated hydrides is found to decrease with increasing cerium content. The results are explained on the basis of P–C–T measurements carried out at room temperature. As expected, the hydrogen absorption and desorption pressures and the hysteresis increase with cerium content. The dehydrogenation kinetics of CO-treated hydrides is related to the cerium content of the alloys.