AI Article Synopsis
- Composition and morphology significantly impact the effectiveness of Pt-based catalysts, especially in direct methanol fuel cells (DMFCs).
- Researchers developed PtRu mesoporous nanospheres (MNs) with adjustable compositions, which demonstrated superior performance as electrocatalysts for the methanol oxidation reaction (MOR) when supported on carbon.
- The optimal PtRu (2:1) MNs/C catalyst exhibited a mass activity of 111.77 mA/mg—about 6.45 times higher than that of Pt MNs/C—and showed excellent stability and CO tolerance over 500 cycles.
Article Abstract
Composition and morphology are crucial factors in the design of Pt-based catalysts with high performance, particularly in direct methanol fuel cells (DMFCs). Herein, PtRu mesoporous nanospheres (PtRu MNs) with tunable compositions were synthesized a facile method and then deposited on a carbon support to act as electrocatalyst materials for the methanol oxidation reaction (MOR). Superior catalytic activity, better catalytic stability, and good tolerance to CO were achieved by the optimum PtRu (2 : 1) MNs/C catalyst compared with Pt MNs/C. The mass activity on PtRu (2 : 1) MNs/C reached 111.77 mA mg , which was approximately 6.45-fold higher than that of Pt MNs/C (17.33 mA mg ). Meanwhile, PtRu (2 : 1) MNs/C retained much more current density (84.7%) than Pt MNs/C (17.7%) after 500 cycles. The improved catalytic performance is due to several factors, including the formation of a mesoporous nanostructure with abundant active sites and the favorable effects of the Ru species. This work provides guidance toward designing and fabricating effective Pt-based electrocatalysts for DMFC applications.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11334057 | PMC |
| http://dx.doi.org/10.1039/d4na00210e | DOI Listing |
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