Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5148106 | International Journal of Hydrogen Energy | 2017 | 8 Pages |
Abstract
The fabrication of a highly CO-tolerant and durable anodic electrocatalyst is extremely important for the widespread application and commercialization of the direct methanol fuel cells (DMFCs). Here, we deposited the platinum nanoparticles (ca. â¼4Â nm) on the multi-walled carbon nanotubes (MWNTs) after wrapping by the dihydroxy-polybenzimidazole (2OH-PBI). The Pt utilization efficiency of the as-synthesized electrocatalyst reached â¼70%. Meanwhile, the CO-tolerance was â¼1.5 times higher than that of the commercial CB/Pt due to the OH groups on the 2OH-PBI, facilitating the formation of PtOH as well as the consumption of PtCO. The electrochemical surface area (ECSA) and mass activity measured in the methanol oxidation reaction (MOR) decreased by â¼10% and 50% after 100,000 potential cycles from 1.0 to 1.5Â V vs. RHE, respectively, while, the commercial CB/Pt lost â¼46% and 50% after 10,000 potential cycles, indicating that the as-synthesized electrocatalyst showed 10 times higher durability compared to the commercial CB/Pt. Such durable electrocatalyst with high CO-tolerance is applicable in the DMFC.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Zehui Yang, Fang Luo,