Fabrication of high performance carbon-supported ternary Pd-Cu-Fe electrocatalysts for formic acid electrooxidation via partly galvanic sacrifice of tunable binary Cu-Fe alloy templates

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• 作者：Baoyun Yu ; Wenjuan Wen ; Wenpeng Li ; ^{liwenpeng@qlu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; ^{wenpengli75@163.com" class="auth_mail" title="E-mail the corresponding author} ; Yang Yang ; Dandan Hou ; Changshuo Liu
• 关键词：Ternary Pd-Cu-Fe electrocatalyst ; Partly sacrifice template ; Formic acid oxidation ; Fuel cells ; Alloy template
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：1 April 2016
• 年：2016
• 卷：196
• 期：Complete
• 页码：223-230
• 全文大小：1794 K

文摘

Carbon loaded Pd-Cu-Fe catalysts (Pd-Cu-Fe/C) were fabricated with a novel strategy of partly etching carbon loaded tunable binary Cu-Fe alloy templates (Cu₉Fe₁, Cu₈Fe₂, Cu₇Fe₃) with Pd²⁺. The obtained Pd-Cu-Fe catalysts started from all the three templates showed better performance for formic acid oxidation than Pd and Pt. Compared with Pd/C catalysts, the anodic peak potential at the catalysts started from Cu₉Fe₁, Cu₈Fe₂ and Cu₇Fe₃ shifted toward negative value by 51 mV, 88 mV and 110 mV, respectively. Among them, catalyst started from Cu₇Fe₃ template exhibited the highest catalytic activity and a high stability, suggesting that it is a good candidate for the formic acid fuel cell. The characteristics of the Pd-Cu-Fe/C ternary catalysts were correlated using X-ray diffraction analysis, X-ray photoelectron spectroscopy, inductively coupled plasma-atomic emission spectrometry, energy dispersive spectrometer, transmission electron microscopy, and electrochemical measurements.