Carbon nanotubes-supported colloidal Ag–Pd nanoparticles as electrocatalysts toward oxygen reduction reaction in alkaline electrolyte
✍ Scribed by Chien-Liang Lee; Hsueh-Ping Chiou; Kun-Chuan Chang; Chun-Han Huang
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 784 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0360-3199
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✦ Synopsis
and supported on multiwall carbon nanotubes (CNTs) were prepared by the self-regulated reduction of sodium dodecyl sulfate, and then, they were used as catalysts for oxygen reduction reactions (ORRs) in 1 M NaOH solution. Polarization curves showed that, among the prepared nanocatalysts, Ag 4 Pd 1 /CNT nanocatalysts showed higher activity. During the ORRs, two types of oxygen coverages given by the Temkin isotherm and Langmuir isotherm were observed for low and high overpotentials, respectively. KouteckyeLevich plots showed that the number of electrons involved in the ORRs catalyzed by Ag 1 Pd 1 /CNT, Ag 2 Pd 1 /CNT, and Ag 4 Pd 1 /CNT were 2.11, 1.88, and 2.25, respectively. These ORRs proceeded through a two-electron pathway. Polarization curve in the electrolyte with methanol revealed that Ag 4 Pd 1 /CNT has high methanol tolerance during ORRs.