Non-catalytic hydrolysis of CaMg₂-based materials (abbreviated as CaMg₂, CaMg₂–0.1Ni, H-CaMg₂, and H-CaMg₂–0.1Ni hereinafter) fabricated by ball milling for hydrogen supply has been investigated in the present work. With respect to the as-melted counterparts, it is found that both milled CaMg₂ and H-CaMg₂-based samples can significantly enhance the hydrolysis performance via adjusting the milling durations. In particular, 0.5 h-milled CaMg₂ and 3 h-milled H-CaMg₂ exert optimal kinetics at ambient temperature, delivering a hydrogen yield of 539 mL g⁻¹ within 2 h and 1439 mL g⁻¹ of H₂ within only 3 min, respectively. In addition, the further results indicate that the hydrogen uptake of CaMg₂ can be accelerated by doping with the Ni element, giving rise to considerably enhanced hydrolytic dynamics, as opposed to a limited promotion of the hydrolysis of the CaMg₂ alloy. For example, the hydrogen yield of H-CaMg₂–0.1Ni increases from 853 to 1147 mL g⁻¹ H₂ in 5 min with hydrogenation durations ranging from 0.5 to 1.5 h, much higher than the values (598–954 mL g⁻¹ H₂) of H-CaMg₂ under the same conditions. More specifically, the 3 h-milled H-CaMg₂ sample also demonstrates excellent cryogenic hydrolysis kinetics, achieving a hydrogen yield of 1332 mL g⁻¹ H₂ within 15 min at 0 °C. In comparison with the conventional hydrogenation of pristine CaMg₂ conducted at elevated temperature, a more feasible strategy is applied to realize its hydrogen uptake by ball milling with Ni under mild conditions. Expectedly, the hydrogen supply capacities of the hydrogenated samples are markedly enhanced, making them promising to achieve their wide applications in hydrogen energy areas in the future.

中文翻译：

---

球磨增强了CaMg2基材料的制氢性能

目前，已经研究了通过球磨制备的CaMg ₂基材料（以下简称为CaMg ₂，CaMg ₂ –0.1Ni，H-CaMg ₂和H-CaMg ₂ –0.1Ni）的非催化水解以供氢。工作。关于作为熔化的对应，可以发现，无论研磨为CaMg ₂和H-为CaMg _2米系的样品可以显著提高水解性能通过调整研磨持续时间。特别是，在环境温度下0.5 h研磨的CaMg ₂和3 h研磨的H-CaMg _2表现出最佳的动力学，提供539 mL g ^-1的氢气产率仅在3小时内分别在2 h和1439 mL g ^-1的H ₂中。此外，进一步的结果表明，与有限地促进CaMg ₂合金的水解相反，通过掺杂Ni元素可以促进CaMg ₂的氢吸收，从而大大提高了水解动力学。例如，H-为CaMg的氢产率_2个从853 -0.1Ni增加至1147毫升克^-1 ħ ₂在5分钟内用氢化持续时间范围从0.5到1.5小时，低于值（598-954毫升克高得多^{- 1} H ₂）的H-CaMg ₂在相同条件下。更具体地说，经过3 h研磨的H-CaMg ₂样品还显示出出色的低温水解动力学，在0°C下15分钟内获得了1332 mL g ^-1 H ₂的氢产率。与在高温下进行的传统原始CaMg ₂加氢相比，采用了一种更可行的策略，以在温和的条件下用Ni进行球磨来实现其对氢的吸收。可以预期，氢化样品的氢供应能力将显着提高，使其有望在将来在氢能领域获得广泛的应用。