酸性电解液对SPE制氢能效值影响的实验研究

Experimental Study on Effect of Acidic Electrolyte on Energy Efficiency of SPE Hydrogen Production

介绍固体聚合物电解池(SPE)制氢原理。采用微槽道SPE,采用CCM(催化剂涂层膜)法在质子交换膜两侧形成阳极催化层和阴极催化层,以纯水和质量分数为0.1%~1.0%的稀硫酸溶液分别作为电解液,控制实验温度为30、40、50℃,以电解电流作为基础变量,对制氢能效值进行对比分析。实验结果显示:质量分数为0.2%的稀硫酸溶液制氢能效值最高。微量酸性氢离子的添加对制氢能效值的提升有较大促进作用,但随着硫酸浓度升高,促进作用减弱。稀硫酸作为电解液时,小范围的温度升高对制氢能效值有一定影响。

The principle of hydrogen production by solid polymer electrolyte(SPE)cell is introduced.In the micro-channel SPE,the catalyst coating membrane(CCM)method is used to form the anode catalytic layer and cathode catalytic layer on both sides of the proton-exchange membrane.Using pure water and dilute sulfuric acid solution with mass fraction of 0.1%to 1.0%as electrolytes respectively,and the electrolytic current as the basic variable,the energy efficiency of hydrogen production is compared and analyzed at the experimental temperature of 30,40 and 50℃.The experimental results show that the dilute sulfuric acid solution with a mass fraction of 0.2%has the highest hydrogen production efficiency.The addition of trace acidic hydrogen ions has a significant promoting effect on the improvement of energy efficiency of hydrogen production,but the promoting effect weakens with the increase of sulfuric acid concentration.When dilute sulfuric acid is used as an electrolyte,a small range of temperature rise has a certain impact on the energy efficiency of hydrogen production.