Abstract
Bimetallic Pt-based catalysts have been extensively investigated to enhance the performance of direct methanol fuel cells (DMFCs) because CO, a by-product, reduces the activity of the pure Pt catalysts. Herein, we synthesized Pt-Pb hexagonal nanoplates as a model catalyst for the methanol oxidation reaction (MOR) and further controlled the Pt and Pb distributions on the surface of the nanoplates through acetic acid (HAc) treatment. As a result, we obtained Pt-Pb nanoplates and HAc-treated Pt-Pb nanoplates with homogeneous and heterogeneous distributions of the Pt-Pb alloy surfaces, respectively. We showed that the MOR activity and stability of the Pt-Pb nanoplates improved compared to those of the HAc-treated Pt-Pb nanoplates, mainly due to the enhanced CO tolerance and the modified electronic structure of Pt under the influence of the oxophilic Pb.
| Original language | English |
|---|---|
| Pages (from-to) | 813-819 |
| Number of pages | 7 |
| Journal | Chinese Journal of Catalysis |
| Volume | 41 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 2020 |
Keywords
- Lead
- Methanol oxidation reaction
- Nanoplate
- Platinum
- Surface atomic distribution
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