2024-03-28T11:12:23Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:02001626
2023-01-16T05:09:20Z
1917:1918:1919
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
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.
journal article
Royal Society of Chemistry
2021-05-28
application/pdf
Dalton Transactions
20
50
6811
6822
1477-9226
https://nagoya.repo.nii.ac.jp/record/2001626/files/DT_ART_02_2021_000647_Wan-HPCS-no_highlighting.pdf
eng
https://doi.org/10.1039/D1DT00647A