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Kirkendall effect-driven formation of hollow PtNi alloy nanostructures with enhanced oxygen reduction reaction performance
- Authors
- Byeon, Jeong-Hyeon; Park, Deok-Hye; Lee, Woo -Jun; Kim, Min -Ha; Lee, Hak-Joo; Park, Kyung- Won
- Issue Date
- Feb-2023
- Publisher
- ELSEVIER
- Keywords
- Polymer electrolyte membrane fuel cell; Oxygen reduction reaction; PtNi alloy catalyst; Hollow nanostructure
- Citation
- JOURNAL OF POWER SOURCES, v.556
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 556
- ISSN
- 0378-7753
- Abstract
- The design of Pt-based cathode catalyst for the oxygen reduction reaction (ORR) is critical for fabricating high-performance polymer electrolyte membrane fuel cells. In this study, hollow PtNi alloy nanostructures (h-PtNi/C-X) deposited on a carbon black support are prepared using a facile synthesis method at various pH value (X). The degree of alloying of the hollow nanostructures is modulated with increasing pH. Among these h-PtNi/C cata-lysts, h-PtNi/C-11 exhibits superior ORR activity (five-fold mass activity and higher power density) and improved durability both in half and unit cells, compared to a commercial Pt/C catalyst.
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Related Researcher
- PARK, KYUNG WON
- College of Engineering (Department of Chemical)