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>Pt:Sn/GO electrocatalysts for methanol and ethanol oxidation reactions: Effect of bimetallic composition and carbon support types
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Pt:Sn/GO electrocatalysts for methanol and ethanol oxidation reactions: Effect of bimetallic composition and carbon support types
Abstract Pt and Pt:Sn nanoparticles were prepared by sonochemical synthesis. Three different Pt:Sn ratios (1:1), (1:2), and (2:1) as well as two carbon supports (graphene oxide and Vulcan) were investigated on the electrochemical activity for methanol and ethanol oxidation reactions in acid medium. Characterization results indicated that the Pt:Sn composition modified the particle size and crystallinity. The oxygen content, morphology, and structure of graphene oxide support increased the Pt dispersion. The presence of Sn favors the methanol oxidation reaction reducing the formation of intermediates. Electrochemical results indicated that Pt:Sn/GO (2:1) with higher load of Pt presented superior specific activity for methanol and ethanol oxidation reactions compared to Pt/C and Pt/GO electrocatalysts.Graphic abstract (B. Ruiz-Camacho et al.)
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机译:摘要 采用声化学合成法制备了Pt和Pt:Sn纳米颗粒。研究了3种不同的Pt:Sn比(1:1)、(1:2)和(2:1)以及两种碳载体(氧化石墨烯和Vulcan)对甲醇和乙醇氧化反应在酸性介质中的电化学活性的影响。表征结果表明,Pt:Sn成分改变了粒径和结晶度。氧化石墨烯载体的氧含量、形貌和结构增加了Pt分散体。Sn的存在有利于甲醇氧化反应,从而减少中间体的形成。电化学结果表明,与Pt/C和Pt/GO电催化剂相比,Pt负载量较高的Pt:Sn/GO(2:1)对甲醇和乙醇氧化反应具有优异的比活性。图形摘要(B. Ruiz-Camacho et al.)
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