Kim, In Gyeom Yoo, Sung Jong Kim, Jin Young Park, Hyun S. Lee, So Young Seo, Bora Lee, Kwan-Young Jang, Jong Hyun Park, Hee-Young 2024-04-11T04:31:15Z 2024-04-11T04:31:15Z 2024-04-11 2024-02 2093-8551 https://pubs.kist.re.kr/handle/201004/149638 Polymer electrolyte membrane fuel cells (PEMFCs) are green energy conversion devices, for which commercial markets have been established, owing to their application in fuel cell vehicles (FCVs). Development of cathode electrocatalysts, replacing commercial Pt/C, plays a crucial role in factors such as cost reduction, high performance, and durability in FCVs. PtNi octahedral catalysts are promising for oxygen reduction reactions owing to their significantly higher mass activity (10- 15 times) than that of Pt/C; however, their application in membrane electrode assemblies (MEAs) is challenged by their low stability. To overcome this durability issue, various approaches, such as third -metal doping, composition control, halide treatment, formation of a Pt layer, annealing treatment, and size control, have been explored and have shown promising improvements in stability in rotating disk electrode (RDE) testing. In this review, we aimed to compare the features of each strategy in terms of enhancing stability by introducing a stability improvement factor for a direct and reasonable comparison. The limitations of each strategy for enhancing stability of PtNi octahedral are also described. This review can serve as a valuable guide for the development of strategies to enhance the durability of octahedral PtNi. English The Korean Electrochemical Society A Review of Strategies to Improve the Stability of Carbon-supported PtNi Octahedral for Cathode Electrocatalysts in Polymer Electrolyte Membrane Fuel Cells Article 10.33961/jecst.2023.00941 1 Journal of Electrochemical Science and Technology, v.15, no.1, pp.96 - 110 Journal of Electrochemical Science and Technology 15 1 96 110 Y scie scopus 001179073300013 2-s2.0-85186610758 Electrochemistry Electrochemistry Review OXYGEN REDUCTION REACTION PARTICLE-SIZE NANOPARTICLE CATALYSTS ENHANCED ACTIVITY PERFORMANCE PT3NI DURABILITY SHELL LAYER OXIDATION Pt-based electrocatalysts Improved stability of PtNi octahedral Oxygen reduction reaction Polymer electro- lyte membrane fuel cells