Anodization driven enhancement of catalytic activity of Pd towards electro-oxidation of methanol, ethanol and formic acid

作者：Sun, Junzhe; Wang, Yingzi; Zhang, Chi; Kou, Tianyi; Zhang, Zhonghua^*

来源：Electrochemistry Communications, 2012, 21: 42-45.

DOI：10.1016/j.elecom.2012.04.023

• Pd
• Anodization
• Electro-oxidation
• Cyclic voltammograms
• Fuel cells

The anodization of Pd in a 1.0 M H2SO4 solution has been investigated, which enables spontaneous formation of Pd nanoparticles. Electrochemical measurements show that the anodized Pd exhibits significantly larger electrochemically active surface area (EASA) and excellent catalytic activity towards electro-oxidation of methanol, ethanol, and formic acid in comparison to the flat Pd. The electro-catalytic activity of the anodized Pd is ca. 260 and 210 times higher than that of the flat Pd for the oxidation of methanol and ethanol in the alkaline media, respectively. Moreover, the anodized Pd presents superior steady-state activity for the diffusion-controlled electro-oxidation of methanol, and the anodization greatly enhances the intrinsic catalytic activity of each Pd atom. The anodized Pd will be a promising candidate for anode catalysts of fuel cells.

• 出版日期2012-7
• 单位济南大学; 山东大学