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| Pdx-Co/C催化甲酸的电氧化性能研究 |
| Study on Electro-oxidation of Formic Acid Catalyzed by Pdx-Co/C |
| 投稿时间：2018-06-21 |
| DOI： |
| 中文关键词: 催化化学 Pd/C 催化剂 甲酸氧化 直接甲酸燃料电池(DFAFC) |
| 英文关键词: catalytic chemistry Pd/C catalystic formic acid oxidation direct formic acid fuel cell(DFAFC) |
| 基金项目:国家自然科学基金(21463017)、哈尔滨工程大学超轻材料与表面技术教育部重点实验室2019年开放课题。 |
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| 中文摘要: |
| 以活性碳(Vulcan XC-72)为载体，用化学还原法制备了不同Pd/Co摩尔比的Pdx-Co/C催化剂。用透射电镜(TEM)、X射线衍射(XRD)及X射线光电子能谱(XPS)对催化剂进行了表征，采用循环伏安法考察了催化剂对甲酸电氧化反应的催化性能。结果表明，Pdx-Co复合催化剂粒子均匀分散在碳载体表面；催化剂中掺入的少量Co元素部分进入Pd晶格，形成了Pd-Co合金；随着Pd/Co摩尔比的增加，Pd颗粒粒径先增大后减小，催化活性也表现出相同的变化趋势；当Pd:Co=8:1时，所得Pd8-Co/C对甲酸氧化的催化活性最高，峰电流密度可达到15.907 mA/cm2。 |
| 英文摘要: |
| Pdx-Co/C catalysts with different Pd/Co molar ratios were prepared by chemical reduction using activated carbon (Vulcan XC-72) as carrier. The catalysts were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Their catalytic performance for formic acid electrooxidation was investigated by cyclic voltammetry. The results show that the Pdx-Co particles are uniformly dispersed on the surface of the carbon support. A small amount of Co incorporated into the catalyst enters the Pd lattice and formed Pd-Co alloy. With the increase of the Pd/Co molar ratio, Pd particle size first increases and then decreases, and their catalytic activity also shows the same trend. When the Pd:Co is 8:1, the obtained Pd8-Co/C has the highest catalytic activity for formic acid oxidation, and the peak current density reaches to 15.907 mA/cm2. |
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