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• W4310294517 abstract "A cathode catalyst possessing increased activity for oxygen reduction reaction (ORR) with superior durability is greatly required for polymer electrolyte membrane fuel cells (PEMFCs). Although Platinum (Pt) alloys have been widely studied for ORR, their real time application in fuel cells still remains a challenging task. Chemically ordered Pt alloys have attracted widespread attention due to the unique electronic and geometric factors that boost their electrocatalytic activity. Therefore, it is highly urgent to fabricate such ordered alloys as efficient cathode catalysts in fuel cells. Herein we report for the first time, a one-step solid-state method for the preparation of Pt3-xCo0.5+yNi0.5+y/C (x=0, 1, 2; y= 0, 0.5, 1) nanoparticles on carbon support. Different compositions of this catalyst were studied and Pt2Co1Ni1/C was found to be the optimal, best performing catalyst both under half-cell and full-cell conditions. Interestingly, the mass activity of Pt2Co1Ni1/C was found to be seven times higher than that of commercial Pt/C in an acidic medium, achieving the Department of Energy (DOE) target for 2025. Moreover, a retention in mass activity after 50k cycles confirmed the superiority of this catalyst in effectively catalysing ORR reactions under an acidic medium. Importantly, the peak power density achieved by Pt2Co1Ni1/C under actual PEMFC operating conditions outperforms the commercially used Pt/C. Thus, this work provides a new approach for the simple scalable synthesis of optimal cathode catalysts for fuel cells, opening up new dimensions in the field of energy research." @default.
• W4310294517 created "2022-11-30" @default.
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• W4310294517 date "2023-11-01" @default.
• W4310294517 modified "2023-10-15" @default.
• W4310294517 title "Methodical designing of Pt3−xCo0.5+yNi0.5+y/C (x = 0, 1, 2; y = 0, 0.5, 1) particles using a single-step solid state chemistry method as efficient cathode catalyst in H2-O2 fuel cells" @default.
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• W4310294517 doi "https://doi.org/10.1016/j.cattod.2022.11.024" @default.
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