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| Effect of Pt Coating on Electrochemical Behavior and Interfacial Conductivity of TA4 Bipolar Plate in Anode Side Environment of Proton Exchange Membrane Water Electrolyzer for Hydrogen Production |
XU Guizhi1,2, DU Xiaoze1, HU Xiao2, SONG Jie2( ) |
1 School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
2 State Key Laboratory of Advanced Power Transmission Technology, State Grid Smart Grid Research Institute Co., Ltd., Beijing 102209, China |
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Cite this article:
XU Guizhi, DU Xiaoze, HU Xiao, SONG Jie. Effect of Pt Coating on Electrochemical Behavior and Interfacial Conductivity of TA4 Bipolar Plate in Anode Side Environment of Proton Exchange Membrane Water Electrolyzer for Hydrogen Production. Journal of Chinese Society for Corrosion and protection, 2024, 44(5): 1370-1376.
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Abstract Pt coatings were successfully deposited on the surface of TA4 Ti-alloy using the DC pulse magnetron sputtering technique. With the increasing deposition time, the lattice constants of Pt coating increased from 0.39112 nm at 5 min to 0.39128 nm at 15 min, correspondingly the thickness increased from approximately 0.29 μm to around 0.95 μm. Electrochemical studies revealed that the open circuit voltage (OCP) of Pt-coated TC4 was approximately 0.77 V higher than that of the plain TA4. With the extension of deposition time, the interfacial electrochemical reaction resistance further increases, as a result, its charge transfer resistance will gradually increase with deposition time as described as below: 5.52 × 104, 5.91 × 104, and 6.1 × 104 Ω·cm2, respectively. Importantly, the Pt coating effectively enhanced and maintained the excellent interface conductivity, as the interface contact resistance (ICR) only exhibited a slight increase after a simulated steady-state polarization testing. In sum, the Pt coating can significantly enhance the interfacial conductivity of TA4 in the anode side environment of proton exchange membrane hydrogen electrolyzer (PEMWE).
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Received: 12 December 2023
32134.14.1005.4537.2023.386
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| Fund: National Key Research and Development Program of China(2021YFB4000100);Science and Technology Foundation of SGCC(521532220014) |
Corresponding Authors:
SONG Jie, E-mail: songjie_bj@163.com
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