The influence of sodium ion on the solid polymer electrolyte water electrolysis |
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Authors: | Linsong Zhang Xiao Jie Zhi-Gang Shao Zhi-Min Zhou Gang Xiao Baolian Yi |
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Affiliation: | 1. Fuel Cell System and Engineering Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences,457 Zhongshan Road, Dalian 116023, PR China;2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, PR China;3. New Energy Investment Co. Ltd, China National Offshore Oil Corporation, Beijing 1000016, PR China;4. Eco_materials and Renewable Energy Research Center, Nanjing University, 210093, PR China |
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Abstract: | A study of the influence of sodium ions on the solid polymer electrolyte (SPE) water electrolysis is reported. Different poisoning modes (anode poisoning and cathode poisoning) and different cathode catalysts (Pt/C, Pd/C and RuO2) were compared. The results showed that the anode poisoning had more severe effects than cathode poisoning. The cell voltages increased by 0.730 V and 0.250 V respectively. In the anode poisoning, the cathode potential descended dramatically by 0.570 V. Meanwhile, the pH of cathode feed water increased to above 11.0 due to the reaction of 2H2O+2e−=H2+2OH− taking place. However, the cell voltage increased mainly caused by the anode potential in the cathode poisoning. The results also showed that the poisoning results were similar for different cathode catalysts. |
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Keywords: | SPE water electrolysis Sodium ion Poisoning |
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