Abstract

The possibility of increasing the hydrogen release rate and reducing energy consumption was analyzed using a system in which the anodic process of metal (aluminum) dissolution occurred on one electrode and the process of H₂ release on the other (nickel) electrode. The possibility of generating hydrogen with a current density of ~ 400 mA cm^–2 in NaOH solutions with a concentration of 6–8 mol dm^–3 at a cell voltage of ~ 0.5 V was confirmed. When the electrodes were short-circuited, hydrogen was generated on nickel when aluminum was dissolved at a rate corresponding to current density ~ 100 mA cm^–2. The possibility of simultaneous hydrogen production and electricity generation in the system under consideration was shown. It was found that the maximum net power was generated in 6 mol dm^–3 NaOH. The specific power in such a solution can reach a value of 8 mW cm^–2 at a cell voltage of about 0.15 V. In this case, the hydrogen release rate corresponded to a current density of 60 mA cm^–2.

Graphical abstract

中文翻译：

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降低能源消耗的氢气生产，用于燃料电池和能源领域

摘要

_{使用其中金属（铝）溶解的阳极过程发生在一个电极上并且H 2}释放过程发生在另一电极（镍）上的系统来分析提高氢释放速率和降低能耗的可能性。证实了在浓度为 6-8 mol dm ^–3的 NaOH 溶液中、电池电压约为 0.5 V 时产生电流密度约为 400 mA cm ^–2的氢气的可能性。当电极短路时，当铝以相当于电流密度〜100 mA cm ^–2的速率溶解时，镍上会产生氢气。显示了在所考虑的系统中同时生产氢气和发电的可能性。^{结果发现，6 mol dm –3} NaOH产生最大净功率。在电池电压约为0.15 V 时，这种解决方案的比功率可以达到8 mW cm ^–2的值。在这种情况下，氢释放速率对应于60 mA cm ^–2的电流密度。

图形概要