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采用EDS和XRD表征了Ti改性ZrCo合金的相结构及表面元素分布,采用飞行时间二次离子质谱(TOF-SIMS)以及程控升温热解脱附(TPD)方法研究少量CO(1.05%CO+98.95%H_2气氛,体积分数,)对Zr_(0.8)Ti_(0.2)Co合金氢化行为的影响及作用机制。结果表明:在纯氢环境下ZrCo合金和Zr_(0.8)Ti_(0.2)Co合金饱和吸氢时间分别少于2和4 min,饱和吸氢容量分别为1.8%和1.9%(质量分数)。而在含1.05%CO的氢中ZrCo合金和Zr_(0.8)Ti_(0.2)Co合金在2500 min内均未能达到吸氢饱和,吸氢容量分别下降到0.91%和0.48%,Ti改性导致ZrCo合金在CO杂质气氛中的吸氢动力学性能下降。实验表明,通过773 K、0.5 h热抽空处理可恢复至毒化前吸氢性能。
The phase structure and surface elemental distribution of Ti-modified ZrCo alloy were characterized by EDS and XRD. A small amount of CO (1.05% CO + 98.95) was studied by time of flight secondary ion mass spectrometry (TOF-SIMS) and programmed temperature- % H_2 atmosphere, volume fraction) on the hydrogenation behavior and mechanism of Zr_ (0.8) Ti_ (0.2) Co alloy. The results show that the saturation hydrogen absorption time of ZrCo alloy and Zr 0.8 Ti 0.2 Co alloy in pure hydrogen is less than 2 and 4 min, respectively, and the saturated hydrogen absorption capacities are 1.8% and 1.9% respectively. However, ZrCo and Zr_ (0.8) Ti_ (0.2) Co alloys with hydrogen containing 1.05% CO failed to reach the hydrogen absorption saturation within 2500 min, the hydrogen absorption capacity decreased to 0.91% and 0.48%, respectively. Ti modification resulted in Hydrogen absorption kinetics of ZrCo alloy in CO impurity atmosphere decreases. Experiments show that by 773 K, 0.5 h heat pump can be restored to the pre-poisoning hydrogen storage performance.