Anodization driven enhancement of catalytic activity of Pd towards electro-oxidation of methanol, ethanol and formic acid
Anodization driven enhancement of catalytic activity of Pd towards electro-oxidation of methanol, ethanol and formic acid
复制标题
阳极氧化驱动钯对甲醇、乙醇和甲酸电氧化的催化活性增强
DOI:
10.1016/j.elecom.2012.04.023
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发表时间:
2012-07
期刊:
影响因子:
--
通讯作者:
Zhonghua Zhang
中科院分区:
文献类型:
--
作者:
Junzhe Sun;Yingzi Wang;Chi Zhang;Tianyi Kou;Zhonghua Zhang
The anodization of Pd in a 1.0M H2SO4solution 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.
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