Abstract
Pd metal supported on carbon nanotubes (Pd/CNT) for use as a cathode catalyst in polymer electrolyte fuel cells was covered with silica layers a few nanometers thick to improve the durability of the catalyst under severe cathode conditions. The silica-coated Pd/CNT cathode catalyst showed similar activity for the oxygen reduction to Pd/CNT despite coverage of the Pd metal with a silica insulator. In addition, the silica-coated Pd/CNT was highly durable during potential cycling between 0.05 and 1.20 V (vs. reversible hydrogen electrode) in aqueous HClO4 while Pd/CNT suffered serious deactivation under the same conditions. The silica layers in the silica-coated Pd/CNT prevent the diffusion of dissolved Pd species from the Pd metal out of the layers. Therefore, silica-coated Pd/CNT was highly durable under the cathode conditions. Furthermore, coverage of Pd/CNT with silica layers inhibited the two-electron reduction of oxygen to H2O2.
| Original language | English |
|---|---|
| Pages (from-to) | 381-388 |
| Number of pages | 8 |
| Journal | Journal of Catalysis |
| Volume | 279 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Apr 25 2011 |
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All Science Journal Classification (ASJC) codes
- Catalysis
- Physical and Theoretical Chemistry
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Highly durable carbon nanotube-supported Pd catalysts covered with silica layers for the oxygen reduction reaction. / Takenaka, Sakae; Susuki, Noato; Miyamoto, Hiroaki; Tanabe, Eishi; Matsune, Hideki; Kishida, Masahiro.
In: Journal of Catalysis, Vol. 279, No. 2, 25.04.2011, p. 381-388.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Highly durable carbon nanotube-supported Pd catalysts covered with silica layers for the oxygen reduction reaction
AU - Takenaka, Sakae
AU - Susuki, Noato
AU - Miyamoto, Hiroaki
AU - Tanabe, Eishi
AU - Matsune, Hideki
AU - Kishida, Masahiro
PY - 2011/4/25
Y1 - 2011/4/25
N2 - Pd metal supported on carbon nanotubes (Pd/CNT) for use as a cathode catalyst in polymer electrolyte fuel cells was covered with silica layers a few nanometers thick to improve the durability of the catalyst under severe cathode conditions. The silica-coated Pd/CNT cathode catalyst showed similar activity for the oxygen reduction to Pd/CNT despite coverage of the Pd metal with a silica insulator. In addition, the silica-coated Pd/CNT was highly durable during potential cycling between 0.05 and 1.20 V (vs. reversible hydrogen electrode) in aqueous HClO4 while Pd/CNT suffered serious deactivation under the same conditions. The silica layers in the silica-coated Pd/CNT prevent the diffusion of dissolved Pd species from the Pd metal out of the layers. Therefore, silica-coated Pd/CNT was highly durable under the cathode conditions. Furthermore, coverage of Pd/CNT with silica layers inhibited the two-electron reduction of oxygen to H2O2.
AB - Pd metal supported on carbon nanotubes (Pd/CNT) for use as a cathode catalyst in polymer electrolyte fuel cells was covered with silica layers a few nanometers thick to improve the durability of the catalyst under severe cathode conditions. The silica-coated Pd/CNT cathode catalyst showed similar activity for the oxygen reduction to Pd/CNT despite coverage of the Pd metal with a silica insulator. In addition, the silica-coated Pd/CNT was highly durable during potential cycling between 0.05 and 1.20 V (vs. reversible hydrogen electrode) in aqueous HClO4 while Pd/CNT suffered serious deactivation under the same conditions. The silica layers in the silica-coated Pd/CNT prevent the diffusion of dissolved Pd species from the Pd metal out of the layers. Therefore, silica-coated Pd/CNT was highly durable under the cathode conditions. Furthermore, coverage of Pd/CNT with silica layers inhibited the two-electron reduction of oxygen to H2O2.
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UR - http://www.scopus.com/inward/citedby.url?scp=79953695623&partnerID=8YFLogxK
U2 - 10.1016/j.jcat.2011.02.008
DO - 10.1016/j.jcat.2011.02.008
M3 - Article
VL - 279
SP - 381
EP - 388
JO - Journal of Catalysis
JF - Journal of Catalysis
SN - 0021-9517
IS - 2
ER -