Hydrogen production with reduced energy consumption for use in fuel cells and energy sector

Monatshefte für Chemie / Chemical Monthly Pub Date : 2024-02-26 DOI:10.1007/s00706-023-03159-z

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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.

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生产氢气，降低能耗，用于燃料电池和能源领域

摘要利用一个系统分析了提高氢气释放率和降低能耗的可能性，在该系统中，金属（铝）的阳极溶解过程发生在一个电极上，而氢气释放过程发生在另一个电极（镍）上。实验证实，在浓度为 6-8 mol dm-3 的 NaOH 溶液中，电池电压约为 0.5 V，电流密度约为 400 mA cm-2，即可产生氢气。当电极短路时，当铝溶解时，镍上产生氢气的速率相当于电流密度 ~ 100 mA cm-2。研究表明，在所考虑的系统中，可以同时制氢和发电。研究发现，在 6 mol dm-3 NaOH 溶液中产生的净功率最大。在这种情况下，氢气释放率相当于 60 mA cm-2 的电流密度。图表摘要

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Monatshefte für Chemie / Chemical Monthly

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