PtAu Thin Film as Anode Electrocatalyst in Methanol Fuel Cell

期刊论文
发表日期：

2024年4月14日

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S. Jafar Hoseini,
Mehrangiz Bahrami,
Golandam Askarisarvestani,
S. Masoud Nabavizadeh,
Hamid R. Shahsavari,
Elvira De Giglio,
Piero Mastrorilli

摘要

Expanding the application of methanol fuel cells in the energy economy is only feasible when a low-cost or highly CO-tolerant electrocatalyst replaces Pt catalysts to enhance the electrocatalytic properties of Pt. In this study, a PtAu thin film was produced at the liquid-liquid interface through the simple reduction of [Pt(cod)Cl₂] and [Au(PPh₃)Cl] complexes. The resulting thin film was directly transferred onto a glassy carbon electrode (without the application of Nafion™) and used as an electrocatalyst in the methanol oxidation reaction. Experimental and theoretical results both confirmed that PtAu exhibits lower CO poisoning compared to PtPd or Pt films. The high j_f/j_b ratio (where j_f is the maximum current of the anodic peak in the forward route and j_b is the maximum of peak current in the backward route), and theoretically calculated adsorption energies for PtAu thin film showed higher CO tolerance compared to Pt or PtPd thin film electrocatalysts.