We study the Ga–In–Sn eutectic-catalyzed interaction of aluminum alloys with water resulting in the process of hydrolysis and generation of hydrogen. The aluminum alloys were prepared by melting aluminum with additions of Ga–In–Sn eutectic (5 wt.%), bismuth (3 wt.%), or antimony (3 wt.%). The temperature-dependent kinetics of their hydrolysis in a temperature range 25–70°C is studied by using a volumetric technique. The most efficient activation of the hydrolysis process is achieved for the Al–Ga–In–Sn alloy. The addition of bismuth to the Al–Ga–In–Sn alloy significantly decreases the hydrolysis rate, whereas the addition of antimony has only a weak effect on the process, despite the fact that the standard electrode potentials of bismuth and antimony have close values. The interactions of the studied alloys with water can be well fitted as a topochemical process. The modified Prout–Tompkins equation is used to get the effective hydrolysis-rate constants and it is shown that they increase following the temperature rise within the temperature range from 25 to 70°C. The activation energies of the process of hydrolysis for the studied alloys are calculated from the temperature dependence of the values of effective rate constants, which indicates that, within the main range of hydrogen generation (after the completion of the induction period and prior to the onset of deceleration of hydrogen release), the process of hydrolysis can be described as a diffusion-limited process.

中文翻译：

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通过添加 Ga-In-Sn 共晶合金、铋或锑活化铝的水解研究

我们研究了铝合金与水的 Ga-In-Sn 共晶催化相互作用导致水解和产生氢的过程。铝合金是通过熔化铝并添加 Ga-In-Sn 共晶 (5 wt.%)、铋 (3 wt.%) 或锑 (3 wt.%) 来制备的。通过使用体积技术研究了它们在 25-70°C 温度范围内水解的温度依赖性动力学。Al-Ga-In-Sn 合金实现了水解过程的最有效活化。向 Al-Ga-In-Sn 合金中添加铋显着降低了水解速率，而添加锑对该过程的影响很小，尽管铋和锑的标准电极电位具有接近的值。研究的合金与水的相互作用可以很好地拟合为一种拓扑化学过程。修改后的 Prout-Tompkins 方程用于获得有效水解速率常数，结果表明它们在 25 至 70°C 的温度范围内随着温度升高而增加。所研究合金水解过程的活化能由有效速率常数值的温度依赖性计算得出，这表明，在氢生成的主要范围内（诱导期完成后和开始前）放氢减速），水解过程可描述为扩散受限过程。修改后的 Prout-Tompkins 方程用于获得有效水解速率常数，结果表明它们在 25 至 70°C 的温度范围内随着温度升高而增加。所研究合金水解过程的活化能由有效速率常数值的温度依赖性计算得出，这表明，在氢生成的主要范围内（诱导期完成后和开始前）放氢减速），水解过程可描述为扩散受限过程。修改后的 Prout-Tompkins 方程用于获得有效水解速率常数，结果表明它们在 25 至 70°C 的温度范围内随着温度升高而增加。所研究合金水解过程的活化能由有效速率常数值的温度依赖性计算得出，这表明，在氢生成的主要范围内（诱导期完成后和开始前）放氢减速），水解过程可描述为扩散受限过程。