采用超快动力学表面活性剂提升碱性电解槽的制氢效率
Enhancing hydrogen production in alkaline electrolyzers by using an ultra-fast kinetics surfactant
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中文总结 AI 辅助
本研究利用超快动力学表面活性剂Surfynol 465，在阴离子交换膜电解槽中缩短气泡停留时间、抑制大气泡生成，降低过电位并提升电流密度与功率，但会加速碳钢腐蚀。
中文摘要 AI 辅助
本研究采用超快动力学表面活性剂Surfynol 465，探究表面活性剂吸附动力学对水电解性能的影响。高速光学诊断显示，Surfynol 465可使气泡停留时间缩短一个数量级，还能抑制直径大于200μm的大气泡生成，优于动力学较慢的表面活性剂Triton X-100及无表面活性剂的基准组。研究在阴离子交换膜电解槽（AEMEL）测试台上验证了上述结果：向1 M KOH电解液中添加Surfynol 465，可使电池过电位降低140-150 mV，在2 V电压下电流密度从0.13 A/cm²提升至0.37 A/cm²（近乎增至三倍），为期一周的测试中平均功率提升40%；下游腐蚀分析还发现，该表面活性剂对不同合金的影响存在差异，可降低不锈钢和黄铜的腐蚀，但会加速碳钢的腐蚀。
英文摘要
We study the effect of surfactant adsorption kinetics on water electrolysis performance using Surfynol 465, an ultrafast-kinetics surfactant. High-speed optical diagnostics reveal that Surfynol 465 reduces bubble residence time by an order of magnitude. Compared to the slower surfactant Triton X-100 and the surfactant-free baseline, it also prevents the growth of large bubbles ($>200\ μ$m). We validated these results on an anion-exchange membrane electrolyzer (AEMEL) test bench. Adding Surfynol 465 to the $1\text{ M KOH}$ electrolyte decreases cell overpotential by 140--150 mV. It nearly triples the current density (from 0.13 to 0.37 A/cm$^2$ at 2 V) and increases average power by 40\% during a week-long test. Furthermore, downstream corrosion analyses reveal a strong alloy-dependent response. The surfactant reduces degradation in stainless steel and brass but accelerates corrosion in carbon steel.
