| 王赟,廖卫平,索掌怀.炭黑负载Pt-Fe双金属催化剂对甲醇的电催化氧化性能[J].分子催化,2013,(4):356-361 |
| 炭黑负载Pt-Fe双金属催化剂对甲醇的电催化氧化性能 |
| Methanol Electrocatalytic Oxidation Performance of Carbon Black-supported Pt-Fe Bimetallic Catalyst |
| 投稿时间：2013-06-18 修订日期：2013-06-25 |
| DOI： |
| 中文关键词: 炭黑 铂 铁助剂 甲醇氧化 电催化 |
| 英文关键词:Carbon black Platinum Iron Promoter Methanol Oxidation Electrocatalysis |
| 基金项目:国家自然科学基金项目（面上项目） |
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| 摘要点击次数: 1864 |
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| 中文摘要: |
| 采用浸渍还原法制备了炭黑负载Pt-Fe双金属催化剂，通过X光衍射、扫描电镜及X射线光电子能谱对催化剂进行了表征。利用循环伏安法和计时电流法研究了溶液pH值和Pt/Fe原子比对Pt-Fe/C催化剂的甲醇电催化氧化活性与稳定性的影响。结果显示，当溶液pH值为9.0，Pt/Fe原子比为1:1时，所得Pt-Fe/C催化剂对甲醇的电催化氧化活性与稳定性明显优于Pt/C催化剂。Fe的引入不仅提高了Pt粒子的分散与电化学活性表面积，而且有利于富Pt表面的形成，从而提高了Pt的有效利用率与催化性能。 |
| 英文摘要: |
| Pt-Fe catalysts supported on carbon black with different Pt/Fe atomic ratios were prepared by a impregnation-reduction method. The samples were characterized by X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy. The activity and stability for methanol electrocatalytic oxidation reaction were evaluated by cyclic voltammetry and chronoamperograms method, respectively. The effects of the various Pt/Au atomic ratios and different pH values during the preparation on the activities and stabilities were studied. The obtained Pt-Fe/C catalyst with Pt/Fe atomic ratio of 1:1 at basic solution of pH 9 showed the better catalytic activity and stability than Pt/C catalyst. The results indicate that adding Fe to Pt/C catalyst can improve obviously the dispersion of Pt particles and its electrochemical surface area and form the rich-platinumsurface structure and enhance its electrocatalytic activity and stability. |
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