Ultrafine Pt–Ni nanoparticles in hollow porous carbon spheres for remarkable oxygen reduction reaction catalysis

• Wan, Xian-Kai

• Samjeské, Gabor

• Matsui, Hirosuke

• Chen, Chaoqi

• Muratsugu, Satoshi

• Tada, Mizuki

抄録

Ultrafine bimetallic Pt–Ni nanoparticles, which catalyze the oxygen reduction reaction (ORR) efficiently, were successfully prepared in hollow porous carbon spheres (HPCSs) under the assistance of organic molecules. 2,2′-Dipyridylamine (dpa) was found to be most effective in preparing homogeneous small Pt–Ni nanoparticles (2.0 ± 0.4 nm) without the phase separation of Pt and Ni during synthesis, and the assistance of the organic molecules was investigated for the alloy nanoparticle formation. The Pt–Ni nanoparticle/HPCS catalyst synthesized in the presence of dpa exhibited remarkable electrochemical performance in the ORR showing a high mass activity of 3.25 ± 0.14 A mg^−1Pt at 0.9 VRHE (13.5-fold higher relative to a commercial Pt/C catalyst), a large electrochemical surface area of 105 ± 8 m^2 g^−1 Pt, and high durability. After 60 000 cycles of accelerated durability testing, the mass activity was still 12.3 times higher than that of the commercial Pt/C catalyst.

収録刊行物

• Dalton Transactions

  Dalton Transactions 50 (20), 6811-6822, 2021-05-28

  Royal Society of Chemistry

詳細情報

• CRID: 1050008688836899200
• NII論文ID: 120007170453
• DOI: 10.1039/d1dt00647a
• ISSN: 14779234
• ISSN: 14779226
• HANDLE: 2237/0002001626
• Web Site: https://nagoya.repo.nii.ac.jp/records/2001626
• Web Site: http://pubs.rsc.org/en/content/articlepdf/2021/DT/D1DT00647A
• 本文言語コード: en
• 資料種別: journal article
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