Citation: Hee Jin Kim, Yong-Deok Ahn, Jeonghyeon Kim, Kyoung-Su Kim, Yeon Uk Jeong, Jong Wook Hong, Sang-Il Choi. Surface elemental distribution effect of Pt-Pb hexagonal nanoplates for electrocatalytic methanol oxidation reaction[J]. Chinese Journal of Catalysis, ;2020, 41(5): 813-819. doi: S1872-2067(19)63310-3 shu

Surface elemental distribution effect of Pt-Pb hexagonal nanoplates for electrocatalytic methanol oxidation reaction

a Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, Korea;
b Department of Chemistry, University of Ulsan, Ulsan 44610, Korea;
c School of Materials Science and Engineering, Kyungpook National University, Daegu 41566, Korea

Received Date: 26 December 2018
Revised Date: 24 January 2019

Fund Project: This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2018R1C1B6004272).

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.
- Platinum,
- Lead,
- Nanoplate,
- Surface atomic distribution,
- Methanol oxidation reaction
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