Enhancement Performance and Reliability Using Defect Control for PEMFC

PGM (Platinum Group Metals)-based catalysts have attracted attention as research to solve problems such as the synthesizing ultra-low loading platinum catalysts and weakening durability due to deterioration in PEMFCs (Proton Exchange Membrane Fuel Cells). The carbon support coated with metal oxide made by defect control can suppress carbon corrosion and deterioration caused by overvoltage at the fuel cell cathode [1]. It is possible to preserve the activity of the catalyst by desorption of by-products generated during the oxidation process of fuel and by dropping the CO mixed in the air from platinum [2]. In addition, platinum catalysts in defect control metal oxide supports could reduce platinum loading by providing limited active sites. In this study, in order to evaluate the durability of the anode catalyst, the electrochemical reaction and material structure of the low-loading platinum catalyst by metal oxide content was analyzed. Comparison with commercially available catalysts for evaluation of catalyst durability in a hydrogen oxidation reaction and methanol oxidation reaction confirmed the superior persistence and minimal performance degradation through Cyclic Voltammetry (CV) tests (30K cycles in acidic environments) and Chronoamperometry (CA). The recent results and directions of this catalytic study are discussed.<br/><br/><b>REFERENCES</b><br/>1. Zhao, Junjie, Zhengkai Tu, and Siew Hwa Chan. Carbon corrosion mechanism and mitigation strategies in a proton exchange membrane fuel cell (PEMFC): A review. Journal of Power Sources 488 (2021): 229434.<br/>2. Kakati, Nitul, et al. Anode catalysts for direct methanol fuel cells in acidic media: do we have any alternative for Pt or Pt–Ru?. Chemical reviews 114.24 (2014): 12397-12429.