Abstract
In this paper, platinum–copper (Pt–Cu) alloy colloid was prepared using the microwave-assisted polyol reduction method with chloroplatinic acid and copper chloride as precursors. During the preparation, the metal particles were loaded on the nitrogen-doped carbon nanotubes (NCNTs) using the sol–gel method. Catalysts with different metal proportions were prepared to investigate the activity of oxygen reduction reaction (ORR), and commercial Pt/C catalyst was used as control. A series of characterizations including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy were employed to study the morphology and composition of the catalysts. The results revealed that the Pt–Cu alloy can be well loaded on NCNTs and displayed good ORR catalytic activities, especially CuPt–NCNT1:3 with the mass activities as 0.12A/mgPt; Ik was 0.56 mA/cm2Pt, which was better than those of the commercial Pt/C catalyst. It was also found that the half-wave potential and diffusion-limited current curves were close to those of the commercial ones, which demonstrate a simple and effective way to prepare the catalyst for fuel cell.
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Acknowledgements
Y. Zhao would like to thank the key research and development program project of Hebei province, China (No. 17211223), the project of the science and technology of Tangshan city, China (No. 17110229a), and the science and technology project of Hebei Education Department, China (No. Z2020102).
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Zhao, Y., Liu, R. Cu@Pt/NCNT preparation and electrochemical performance. J Mater Sci: Mater Electron 32, 4214–4227 (2021). https://doi.org/10.1007/s10854-020-05166-w
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DOI: https://doi.org/10.1007/s10854-020-05166-w