Rationalizing efficient and economical electrocatalysts for ethanol electro-oxidation (EOR) is crucial for the development of sustainable energy sources. Herein, porous carbon-supported PtPdCu ternary alloy heterostructures (PtPdCu/C, : : = atomic ratio) were constructed using Cu-BTC as the precursor. Benefiting from the advantages of its three-dimensional spatial network structure, flexible ternary alloy composition and strong metal-support interaction, the as-designed PtPdCu/C catalyst presents impressive EOR performance. Specifically, it achieved an EOR specific activity of 37.89 mA cm in alkaline electrolyte, which is 6 and 11.4 times higher than those of Pt/C (6.3 mA cm) and Pd/C (3.32 mA cm), respectively, and more than 90% of the initial activity was retained after 1000 consecutive CV cycles. FTIR studies further reveal that the PtPdCu/C catalyst requires a potential of only 0.45 V to oxidize poisonous CO intermediates in the EOR. This work provides valuable insights for the rationalization of MOF-derived ternary alloy electrocatalysts for ethanol electro-oxidation.
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Article Synopsis
- Controlling the structure and composition of Pt-based nanoalloys can enhance their performance for ethanol oxidation reactions (EORs).
- Researchers synthesized sub-10 nm PdNi@PtNi nanoparticles with a core-shell design using a one-pot method, leading to improved catalytic properties.
- The new PdNi@PtNi catalysts demonstrate significantly increased mass and specific activity compared to traditional Pt/C catalysts, alongside better stability, showcasing a promising strategy for enhancing Pt-based electrocatalysts.
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