Ashton Elizabeth, Brenton Matthew, Wilson Jonathan G, Barton John P, Wilson Richard, Strickland Danielle, Kondrat Simon A, Clement Nicolas, Wertz John, Zhang Jibo
CREST, Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough LE11 3TU, U.K.
Department of Chemistry, School of Science, Loughborough University, Loughborough LE11 3TU, U.K.
ACS Appl Energy Mater. 2025 Jan 8;8(2):1112-1125. doi: 10.1021/acsaem.4c02648. eCollection 2025 Jan 27.
A low-cost method of green hydrogen production via the modification of a lead acid battery has been achieved, resulting in a hydrogen flow rate of 5.3 L min from a 20-cell string. The electrochemical behavior and catalytic effect of various metal additives on the hydrogen evolution reaction (HER) was evaluated using cyclic voltammetry. Nickel, cobalt, antimony, manganese, and iron were investigated, with 66 ppm nickel achieving a 75% increase in hydrogen produced from a modified lead acid battery. Design of Experiments (DOE) employing a simple centroid design model to analyze the combined additive effects of nickel, cobalt, and antimony was performed to evaluate the effect on the HER. A combination of Ni:Co:Sb in the ratio 66:17:17 ppm achieved the greatest end voltage shift of the HER from -1.65 to -1.50 V; however, no increase in hydrogen yield was observed in comparison to 66 ppm of nickel when added to a full-scale cell. Gas chromatography using a thermal conductive detector and a sulfur chemiluminescence detector were used to measure the purity of hydrogen obtained from a string of 20 battery electrolyzer cells connected in series. 99% purity hydrogen gas was obtained from the battery electrolyzer cells, with HS impurities below the limit of detection (0.221 ppm).
通过对铅酸电池进行改性，实现了一种低成本的绿色制氢方法，从一个20节电池串中获得的氢气流量为5.3 L/min。使用循环伏安法评估了各种金属添加剂对析氢反应（HER）的电化学行为和催化作用。研究了镍、钴、锑、锰和铁，66 ppm的镍使改性铅酸电池产生的氢气增加了75%。采用简单质心设计模型进行实验设计（DOE），以分析镍、钴和锑的组合添加剂效应，从而评估其对析氢反应的影响。镍、钴、锑比例为66:17:17 ppm的组合使析氢反应的最终电压偏移最大，从-1.65 V变为-1.50 V；然而，与添加到全尺寸电池中的66 ppm镍相比，未观察到氢气产量增加。使用热导检测器和硫化学发光检测器的气相色谱法用于测量从串联连接的20个电池电解槽串中获得的氢气纯度。从电池电解槽中获得了纯度为99%的氢气，HS杂质低于检测限（0.221 ppm）。
