Design and optimization of electrochemical cell potential for hydrogen gas production
Design and optimization of electrochemical cell potential for hydrogen gas production
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DOI：
10.1016/j.jechem.2020.04.026
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发表时间：
2021-01-01
影响因子：
13.1
通讯作者：
Chen, George Z.
中科院分区：
文献类型：
--
作者：
Al-Shara, Nawar K.;Sher, Farooq;Chen, George Z.
本研究旨在优化熔体中制氢(H-2)的最佳工作条件。关于如何通过熔融氢氧化物分解水蒸气进行电化学过程的研究有限。为了优化熔融氢氧化物制氢的最佳工作条件，对阴极、阳极、温度和电压的54种组合进行了研究。所有这些电化学研究都是在225-300摄氏度的温度和1.5-2.5V的外加电压下进行的。以镍、不锈钢和铂为工作阴极的不锈钢阳极电池的电流效率分别为90.5%、80.0%和68.6%。对于镍阴极，电流的增大直接影响阴极的氢气流量。从上述结果可以推测，电流的增加与工作温度和外加电压成正比。在300℃时，当施加电压从1.5V增加到2.5V时，氢气流量分别从1.5增加到11.3 cm(3)min(-1)和1.0增加到13 cm(3)min(-1)。结果表明，不锈钢阳极电池的电流效率高于石墨阳极电池。因此，熔盐水蒸气裂解是目前生产氢气燃料的一种令人鼓舞的替代方法。(C)2020中科院科学出版社和大连化学物理研究所。由Elsevier B.V.和科学出版社出版。版权所有。
This study deals with the optimization of best working conditions in molten melt for the production of hydrogen (H-2) gas. Limited research has been carried out on how electrochemical process occurs through steam splitting via molten hydroxide. 54 combinations of cathode, anode, temperature and voltage have been investigated for the optimization of best working conditions with molten hydroxide for hydrogen gas production. All these electrochemical investigations were carried out at 225 to 300 degrees C temperature and 1.5 to 2.5 V applied voltage values. The current efficiency of 90.5, 80.0 and 68.6% has been achieved using stainless steel anodic cell with nickel, stainless steel and platinum working cathode respectively. For nickel cathode, an increase in the current directly affected the hydrogen gas flow rate at cathode. It can be hypothesized from the noted results that increase in current is directly proportional to operating temperature and applied voltage. Higher values were noted when the applied voltages increased from 1.5 to 2.5 V at 300 degrees C, the flow rate of hydrogen gas increased from 1.5 to 11.3 cm(3) min (-1), 1.0 to 13 cm(3) min (-1) in case of electrolysis @ stainless steel and @ graphite anode respectively. It is observed that the current efficiency of stainless steel anodic cell was higher than the graphite anodic cell. Therefore, steam splitting with the help of molten salts has shown an encouraging alternate to current methodology for H-2 fuel production. (c) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.