Abstract Reverse electrodialysis (RED) as an emerging technology to generate electric power through two different salinity solutions, has deserved full attention in the past decade. Nevertheless, the current generated by the RED may not match the power network and hinder its development. In this work, a novel method called Reverse Electro-Electrodialysis (REED) system was firstly proposed as a method for pure and storable hydrogen production as alternative. Instead of the conventional reversible redox couples, hydrochloric acid and sodium hydroxide are used respectively as cathode solution and anode solution to reduce hydrogen evolution potential. The performance on energy recovery and H 2 production was evaluated by changing ΔC (solution salinity difference). A mathematical model derivate from Nernst–Planck equation was established to correlate the acidic catholyte concentration with electrochemical effect. The results indicate that H 2 production is highly dependent on the current density and the electrode solution's concentration, i.e. the salinity gradient and hydrogen evolution over-potential. A good matching was found between predictions and experiment results.

中文翻译：

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通过反向电渗析 (REED) 生产可储存氢气

摘要 反电渗析（RED）作为一种通过两种不同盐度溶液发电的新兴技术，在过去十年中受到了充分的关注。然而，RED产生的电流可能与电网不匹配并阻碍其发展。在这项工作中，首次提出了一种称为反向电渗析 (REED) 系统的新方法，作为一种替代的纯可储存氢气生产方法。代替传统的可逆氧化还原电对，盐酸和氢氧化钠分别用作阴极溶液和阳极溶液，以降低析氢电位。通过改变ΔC（溶液盐度差）来评估能量回收和H 2 产生的性能。建立了源自 Nernst-Planck 方程的数学模型，以将酸性阴极电解液浓度与电化学效应相关联。结果表明，H 2 的产生高度依赖于电流密度和电极溶液的浓度，即盐度梯度和析氢过电位。在预测和实验结果之间发现了很好的匹配。