High-performance alcohol electrooxidation on Pt3Sn–SnO2 nanocatalysts synthesized through the transformation of Pt–Sn nanoparticles
作者： Liang Wang , Wei Wu , Zhao Lei , Tang Zeng , Yangyang Tan
DOI: 10.1039/C9TA10886F
关键词:
摘要: In this work, Pt3Sn–SnO2 supported on N-doped graphene (Pt3Sn–SnO2/NG) was synthesized through the in situ transformation of Pt–Sn/NG by annealing an air atmosphere. The Pt3Sn–SnO2/NG catalyst, characterized XRD, TEM and HRTEM, forms ordered Pt3Sn intermetallic which every nanoparticle (NP) is close contact with one or more SnO2 NPs. catalyst shows outstanding performance towards ethanol oxidation reaction (EOR) methanol (MOR). mass activity for EOR 469 mA mgPt−1 at 0.7 V, than 10 times that commercial Pt/C (44 mgPt−1). found to have three stability Pt/C. Our also delivers increased higher MOR compared catalyst. addition, observed a CO tolerance high can be attributed unique structure Pt3Sn–SnO2, formed Pt–Sn/NG, induces formation small-sized strongly interacts SnO2. synergetic effect between enhances Sn both SnO2, facilitates removal COads adjacent Pt active sites low potentials providing OHads species; it improves because strong interactions.
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