Electrooxidation of ethylene glycol and glycerol by platinum-based binary and ternary nano-structured catalysts

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• 作者：Akinbayowa Falase ; Michelle Main ; Kristen Garcia ; Alexey Serov ; Carolin Lau ; Plamen Atanassov ; ^{plamen@unm.edu}
• 关键词：Electrocatalytic oxidations ; Ethylene glycol ; Glycerol ; Fuel cells ; Ternary catalyst
• 刊名：Electrochimica Acta
• 出版年：2012
• 期刊代码：30_00134686
• 类别：ch
• 出版时间：1 April, 2012
• 卷：66
• 期：Complete
• 页码：295-301
• 文件大小：1389 K

摘要

Spray pyrolysis of metal precursors was used to synthesize binary and ternary nano-structured Pt-based catalysts. Characterization of the catalysts was performed using SEM, TEM, and EDS to determine morphology, purity and composition. The electrochemical performance of synthesized Pt₈₄Ru₁₆, Pt₉₆Sn₄, and Pt₈₈Ru₆Sn₆ was evaluated via cyclic voltammetry and steady state polarization for oxidation of ethylene glycol and glycerol. The binary Pt₈₄Ru₁₆ and Pt₉₆Sn₄ catalysts had higher maximum currents and better stability than a templated Pt catalyst and templated ternary Pt₈₈Ru₆Sn₆ catalyst. All binary and ternary catalysts had less adsorbed reaction products during potential cycling than the templated platinum electrocatalyst. In situ infrared reflection absorption spectroscopy (IRRAS) analysis showed complete oxidation of ethylene glycol and glycerol with the binary and ternary catalysts by CO₂ generation. This work emphasizes the benefits provided by adding Ru and Sn to Pt catalysts for oxidation of complex alcohols.