Citation: LI Huan-Zhi, TANG Ya-Wen, LU Tian-Hong. Effect of NH₄⁺ on the Electrocatalytic Performance of Carbon Supported Pd Catalyst for Formic Acid Oxidation[J]. Acta Physico-Chimica Sinica, ;2010, 26(12): 3199-3202. doi: 10.3866/PKU.WHXB20101206 shu

Effect of NH₄⁺ on the Electrocatalytic Performance of Carbon Supported Pd Catalyst for Formic Acid Oxidation

1.
College of Chemistry and Material Science, Nanjing Normal University, Nanjing 210097, P. R. China

Received Date: 16 August 2010
Available Online: 26 October 2010
Fund Project: 国家自然科学基金(20873065, 21073094)资助项目 (20873065, 21073094)

We investigated the effect of HClO₄, NH₄ClO₄, and NaClO₄ electrolytes on the electrocatalytic performance of a Pd/C catalyst electrode for formic acid oxidation. The Pd/C catalyst was characterized by X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), and transmission electron microscopy (TEM). The performance of the Pd/C catalyst electrode during formic acid oxidation in different electrolytes was measured using electrochemical methods. We found that the electrocatalytic activity and stability of the Pd/C catalyst electrode for formic acid oxidation decreased in the following order: NH₄ClO₄ > NaClO₄ > HClO₄. The difference in pH between the different electrolytes was small because of the presence of formic acid. Therefore, the electrolyte pH has a small effect and the cations have a large effect. The better performance of the NaClO₄ electrolyte compared to the HClO₄ electrolyte is due to a pH effect. The better performance of the NH₄ClO₄ electrolyte compared to the NaClO₄ electrolyte is due to NH₄⁺ decreasing the adsorption strength and amount of CO on the Pd/C catalyst. This finding has large significance for the increase in the performance of the direct formic acid fuel cell (DFAFC).
- Formic acid,
- Electrolyte,
- Palladium,
- Direct formic acid fuel cell
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沈阳化工大学材料科学与工程学院沈阳 110142

Effect of NH4+ on the Electrocatalytic Performance of Carbon Supported Pd Catalyst for Formic Acid Oxidation

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通讯作者: 陈斌, bchen63@163.com

Effect of NH₄⁺ on the Electrocatalytic Performance of Carbon Supported Pd Catalyst for Formic Acid Oxidation