Structure-phase states in the Cu-Pd-Pt system

Потекаев, А. И.; Клопотов, А. А.; Старостенков, М. Д.; Klopotov, Vladimir D.; Markova, T. N.; Морозов, М. М.

doi:10.3103/s0967091213040141

Cited by 7 publications

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“…Pt and Pd readily form solid solutions across all compositions at elevated temperatures [ 41 , 42 ]. Ternary Pt–Cu–Pd alloys can potentially form at high-temperature; therefore, no high-temperature treatment was used to preserve the Cu–Pt shell/Pd core morphology [ 22 , 23 , 24 , 25 ]. The results from H 2 titration are shown in Figure 4 .…”

Section: Resultsmentioning

confidence: 99%

“…Any metal with sufficient ability to oxidize a reducing agent can be selected as a core metal, but for these studies, a commercial 5 wt % Pd/C (dispersion = 21.6%, average particle diameter = 5.2 nm) was selected as the core metal base catalyst (Engelhard 5 wt % Pd/CP56). Although the existence of ternary Pt–Cu–Pd alloys is argued in the literature, the low-temperature aqueous method of preparation is thought to preclude any bulk ternary alloy formation [ 22 , 23 , 24 , 25 ]. There is insufficient thermal energy to force alloying of the Cu–Pt shell with the bulk Pd core at room temperature.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Highly Active Pd@Cu–Pt/C Methanol Oxidation Electrocatalysts via Continuous, Co-Electroless Deposition

et al. 2021

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Controlled deposition of metals is essential for the creation of bimetallic catalysts having predictable composition and character. Continuous co-electroless deposition (co-ED) permits the creation of bimetallic catalysts with predictive control over composition. This method was applied to create a suite of Cu–Pt mixed-metal shell catalysts for use in methanol electrooxidation in direct methanol fuel cell applications (DMFCs). Enhanced performance of Cu–Pt compositions over Pt alone was predicted by existing computational studies in the literature. Experimental evidence from this study supports the bifunctional catalyst explanation for enhanced activity and confirms the optimum Cu:Pt ratio as Cu3Pt for this methanol electrooxidation. This ability to control the composition of a bimetallic shell can be extended to other systems where the ratio of two metals is critical for catalytic performance.

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