Optimization of Proton Exchange Membrane Electrolyzer Performance with Platinum-Decorated Titanium Felt Porous Transport Layer
Porous transport layer plays a crucial role in gas-water distribution and electron conduc-tion in proton exchange membrane(PEM)electrolyzer.In our study,a platinum-decorated titanium felt with uniform flower-shaped nanocluster structure is constructed by fast potential pulse electrode-position method.The bubble adhesion property is largely optimized for the platinum-decorated tita-nium felt,which can be effectively removed from its surface.Compared with untreated commercial titanium felt,the pulse platinum-decorated titanium felt can significantly reduce mass transport resistance and ohmic resistance loss.The electrolysis voltage is as low as 1.69 V at 1.5 A.cm-2 during the PEM electrolyzer operation.The volume of fluid method is used to explore the gas-liquid flow process in porous transport layer under different wetting characteristics.It is found that pulse platinum-decorated titanium felt with superhydrophilic characteristic has the lowest oxygen propor-tion and shortest bubble breakthrough time.The bubbles can be effectively removed,and mass transfer limitation effect is minimized in the electrolysis process.
proton exchange membrane water electrolysisporous transport layerpulse platinum-decoratedmass transfer optimizationvolume of fluid method
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