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http://dx.doi.org/10.9713/kcer.2022.60.2.202

Study on the Platinum Deposition in Membrane of Polymer Electrolyte Membrane Fuel Cell during Electrode Degradation Process  

Oh, Sohyeong (Department of Chemical Engineering, Sunchon National University)
Gwon, Hyejin (Department of Chemical Engineering, Sunchon National University)
Yoo, Donggeun (Department of Chemical Engineering, Sunchon National University)
Park, Kwonpil (Department of Chemical Engineering, Sunchon National University)
Publication Information
Korean Chemical Engineering Research / v.60, no.2, 2022 , pp. 202-207 More about this Journal
Abstract
The study on electrode degradation of Proton Exchange Membrane Fuel Cell (PEMFC) was mainly studied on the particle growth and active area reduction of Pt on the electrode. The degradation of the electrode catalyst Pt in contact with the membrane affects the deterioration of the polymer membrane, but there are not many studies related to this. In this study, the phenomenon of the deposition of deteriorated Pt inside the polymer membrane during the accelerated electrode catalyst degradation test and its effects were studied. The voltage change (0.6 V ↔ 0.9 V) was repeated up to 30,000 cycles to accelerate the platinum degradation rate. When the voltage change cycle was repeated while oxygen was introduced into the cathode, the amount of Pt deposited inside the film was larger than when nitrogen was introduced. As the number of voltage change cycles increased, the amount of Pt deposited inside the membrane increased, and Pt dissolved in the cathode moved toward the anode, showing a uniform distribution throughout the membrane at 20,000 cycles. In the process of the accelerated electrode catalyst degradation test, the hydrogen crossover current density of the membrane did not change, and it was confirmed that the deposited Pt did not affect the durability of the membrane.
Keywords
PEMFC; Pt degradation; Deposition of Pt; Membrane degradation; Electrode AST;
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Times Cited By KSCI : 2  (Citation Analysis)
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