| 초록 |
Proton exchange membrane fuel cells (PEMFCs) have received much attention in recent years as clean and efficient energy source. For electric vehicle application, long-term durability of PEMFCs is important, which is dependent on the stability and activity of catalysts. However, severe degradation of cathode catalysts is frequently observed during transient start-up/shut-down (SU/SD) conditions in automotive PEMFCs. Due to the oxygen reduction reaction at the anode, corrosion of the carbon material in the cathode could be accelerated. Recently, several researchers proposed oxygen-tolerant anode catalysts that promote only the hydrogen oxidation reaction (HOR) and effectively suppress the oxygen reduction reaction (ORR). In this study, we propose facile synthesis of HOR-selective electrocatalysts using hydrothermal in-situ coating. By hydrothermal coating, the number of Pt ensemble sites decreased significantly while selectively promoting the HOR. |
