PtFe alloy catalyst supported on porous carbon nanofiber with high activity and durability for oxygen reduction reaction |
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| Affiliation: | 1. Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 333 Techno Jungang-Daero, Hyeongpung-Myeon, Dalseong-Gun, Daegu 42988, South Korea;2. Robotics Research Division, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 333 Techno Jungang-Daero, Hyeongpung-Myeon, Dalseong-Gun, Daegu 42988, South Korea;1. Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada;2. Vancouver International Clean-Tech Research Institute Inc., 4475 Wayburne Drive, Burnaby V5G 4X4, Canada;3. Department of Materials Science and Engineering, South University of Science and Technology of China, 1088 Xueyuan Blvd, Nanshan District, Shenzhen, Guangdong 518055, China;1. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China;2. University of Chinese Academy of Sciences, Beijing, 100039, China;3. Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, 5625 Renmin Street, Changchun, 130022, PR China;4. Hawaii Natural Energy Institute, University of Hawaii - Manoa, Honolulu, HI 96822 |
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| Abstract: | To reduce the high cost of oxygen reduction reaction (ORR) catalyst and improve the performance of the proton exchange membrane fuel cell (PEMFC), low-Pt or non-Pt catalysts have been studied in recent years. In this paper, PtFe alloy nanoparticles are loaded on porous carbon nanofiber (PCNF) via one-step modified glycol reduction method by adjusting solution pH. On the surface of PCNF, PtFe alloy nanoparticle can be uniformly dispersed with a narrow particle size distribution. The catalyst Pt4.8Fe/PCNF prepared in pH = 7 solution with PCNF as carbon support exhibits better ORR performance, which shows even 18 mV higher onset potential than that of commercial catalyst Pt/C (Johnson Matthey, JM20). Moreover, comparable durability is also obtained through accelerated durability test (ADT) test after 2000 cycles. The excellent performance of Pt4.8Fe/PCNF catalyst may attribute to the structural and electronic effects of transition metal in the PtFe alloy. The rough surface and porous structure of PCNF is also supposed to be beneficial for performance improvement. |
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| Keywords: | PCNF Pt-alloy Oxygen reduction reaction (ORR) Proton exchange membrane fuel cells |
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