Abstract
Here we report the oxygen reduction reaction (ORR) activity of Ag nanoparticles supported on boron doped multi-walled carbon nanotubes (Ag/B-MWCNTs) with different Ag loadings synthesized by a facile chemical method. Transmission electron microscopy (TEM) and X-ray diffraction patterns (XRD) measurements were employed to investigate the morphology and crystal structure of the as-prepared catalysts. The electrochemical results demonstrated that all the Ag/B-MWCNTs samples catalyzed the ORR in alkaline media by an efficient four-electron pathway. Furthermore, Ag/B-MWCNTs with lowest Ag loading (20%) performed the highest mass activity towards ORR mainly due to the synergistic effect of Ag nanoparticles and B-MWCNTs. This work brings insight into the role of supporting materials in reducing the loading of metal catalyst towards low-cost ORR in alkaline media.
| Original language | English |
|---|---|
| Pages (from-to) | 919-924 |
| Journal | Electrochimica Acta |
| Volume | 174 |
| Online published | 25 Jun 2015 |
| DOIs | |
| Publication status | Published - 20 Aug 2015 |
Research Keywords
- Ag nanoparticles
- boron doped multi-walled carbon nanotubes
- electrocatalyst
- oxygen reduction reaction
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