Effect of the structure of Ni nanoparticles on the electrocatalytic activity of Ni@Pd/C for formic acid oxidation

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• 作者：Rongfang Wang ; Hui Wang ; Xingli Wang ; Shijun Liao ; Vladimir Linkov ; Shan Ji
• 关键词：Amorphous ; Electrocatalysts ; Fuel cells ; Formic acid oxidation ; Core&ndash ; shell structure
• 刊名：International Journal of Hydrogen Energy
• 出版年：2013
• 出版时间：30 September, 2013
• 年：2013
• 卷：38
• 期：29
• 页码：13125-13131
• 全文大小：1134 K

文摘

Ni@Pd/C catalysts were synthesized, using Ni/C with different crystalline structures prepared with various ligands. A series of characterizations were performed by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy. The results indicated the electrocatalysts with amorphous/crystalline (denoted as Ni_a and Ni_c) Ni structures decorated with Pd. The formic acid electrocatalytic oxidation results showed that the peak current of Ni_a@Pd/C was about 1.2 times higher than that of Ni_c@Pd/C. The good electrochemical performance and stability of Pd-modified amorphous Ni substrate reveals that the core structure plays an important role in the electrocatalytic activity and the change of the structure can improve the activity and stability of electrocatalysts.