Carbon‐supported Pt‐Co Nanowires as a Novel Cathode Catalyst for Proton Exchange Membrane Fuel Cells. Issue 5 (17th October 2017)

• Record Type: Journal Article
• Authors: Lv, H.; Wang, J.; Yan, Z.; Li, B.; Yang, D.; Zhang, C.
• Is Part Of: Fuel cells. Volume 17:Issue 5(2017:Oct.)
• Page Start: 635
• Page End: 642
• Publication Date: 2017-10-17
• Subjects: CTAB -- Durability -- Oxygen Reduction Reaction (ORR) -- Proton Exchange Membrane Fuel Cell (PEMFC) -- Pt‐Co Nanowires (Pt‐Co NWs); Fuel cells -- Periodicals; 621.312429
• DOI: 10.1002/fuce.201700136
• Languages: English
• ISSNs: 1615-6846

Abstract

Abstract: Carbon‐supported Pt‐Co nanowires (Pt‐Co NWs/C) were prepared through a soft surfactant template method as cathode catalysts for proton exchange membrane fuel cells (PEMFCs). The mass activity of the Pt‐Co NWs/C (0.125 A mgPt −1 ) is 1.5 times higher than that of commercial Pt/C for oxygen reduction reaction (ORR). The accelerated durability test (ADT) showed a loss of 14.7% in electrochemically active surface areas (ECSA) for the Pt‐Co NWs/C, and 35% for the Pt/C after 3, 000 cycles between 0.6 and 1.15 V, indicating that stability was enhanced for the Pt‐Co NWs/C relative to the Pt/C catalyst. The membrane electrode assembly (MEA) employed as‐synthesized Pt‐Co NWs/C as cathode catalyst with a loading of 0.4 mgPtCo cm −2 generated a maximum power density of 2.01 kW gPt −1, which is higher than that of the Pt/C (1.85 kW gPt −1 ). Besides, after 100 h galvanostatic operation condition of 1, 000 mA cm −2, the Pt‐Co NWs/C also exhibited enhanced durability with 71.4 mW cm −2 mass power density loss and 11.8% ECSA loss, as compared with 99.4 mW cm −2 and 24.8% for the Pt/C, respectively. These results suggest that the formation of the interconnected nanowire networks structure of Pt‐Co NWs/C catalyst is favorable to improve activity and durability.