The hydrolysis behavior of CaMgIn, CaMgIn, CaMgIn, and CaMgIn ternary alloys in an MgCl solution following casting and hydrogenation were investigated. The hydrolysis mechanism of these alloys is elucidated through an analysis of microstructure, phase composition, and kinetics before and after hydrolysis. The nucleation-growth Avrami model is employed to accurately model the hydrolysis kinetics, revealing improved hydrolysis yields and reaction rates following hydrogenation. Notably, CaMgIn has demonstrated exceptional hydrolysis characteristics, exhibiting a yield of 1140 mL/g, an initial hydrolysis rate of 113 mL/g·s, and an activation energy of 24.3 ± 1.7 kJ·mol. The yield of H-CaMgIn further escalates to 1800 mL/g with a rate of 221 mL/g·s, attributed to the formation of CaMgH and In phases subsequent to the hydrogenation of InCa and MgIn phases in the alloy. These newly formed phases act as catalysts and actively participate in the hydrolysis process, providing active sites for hydrogen production, thus enhancing hydrolysis yields and kinetics. It is observed that with increasing In content, the order of hydrolysis performance of the alloy is as follows: CaMgIn > CaMgIn > CaMgIn > CaMgIn, consistent with the trend after hydrogenation. These findings indicate that the addition of In significantly enhances the hydrolysis performance of CaMg alloys, offering a promising strategy for preparing magnesium-based alloys with high yields and favorable kinetic properties.

中文翻译：

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用于可持续制氢的 CaMg2InX (X = 0.1, 0.3, 0.5, 0.7) 三元合金的水解行为和机理见解

研究了铸造和氢化后 CaMgIn、CaMgIn、CaMgIn 和 CaMgIn 三元合金在 MgCl 溶液中的水解行为。通过对水解前后的微观结构、相组成和动力学的分析，阐明了这些合金的水解机理。成核生长 Avrami 模型用于精确模拟水解动力学，揭示了氢化后水解产率和反应速率的提高。值得注意的是，CaMgIn表现出优异的水解特性，产量为1140 mL/g，初始水解速率为113 mL/g·s，活化能为24.3 ± 1.7 kJ·mol。H-CaMgIn 的产率进一步升至 1800 mL/g，速率为 221 mL/g·s，这归因于合金中 InCa 和 MgIn 相氢化后形成 CaMgH 和 In 相。这些新形成的相充当催化剂并积极参与水解过程，为氢气生产提供活性位点，从而提高水解产率和动力学。观察到随着In含量的增加，合金的水解性能顺序为：CaMgIn>CaMgIn>CaMgIn>CaMgIn，与加氢后的趋势一致。这些发现表明，In的添加显着增强了CaMg合金的水解性能，为制备高产率和良好动力学性能的镁基合金提供了一种有前景的策略。