Atomically Dispersed Cu–N–C as a Promising Support for Low-Pt Loading Cathode Catalysts of Fuel Cells
2020-04-08T20:29:21Z (GMT) by
It is of great significance to reduce the amount of platinum for the oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells. In this work, a copper single atom coordinated by nitrogen doped carbon nanotubes is employed as a support for the deposition of platinum nanoparticles (Pt/Cu-SAC), according to the prediction of the density functional theory calculation, which reveals the ORR activity of Pt/Cu-SAC should be improved in comparison to that of Pt/C due to the weaker adsorption of oxygen. The prepared Pt/Cu-SAC exhibits more promising ORR activity than the commercial Pt/C due to the synergetic effect of Cu-SAC on the Pt particles. Furthermore, the fuel cell based on Pt/Cu-SAC with a cathode Pt loading of 0.025 mg cm–2 exhibits a peak power density of 526 mW cm–2, which is quite similar to that obtained with the commercial Pt/C with a cathode Pt loading of 0.1 mg cm–2. The Pt/Cu-SAC paves the way to design low-Pt cathode catalysts for the polymer electrolyte membrane fuel cells.
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