| 炭载体前处理对Pt/C催化剂Pt分散性的影响 |
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| 引用本文： | 贾荣利,王成扬,王素梅.炭载体前处理对Pt/C催化剂Pt分散性的影响[J].电源技术,2005,29(12):801-804. |
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| 作者姓名： | 贾荣利 王成扬 王素梅 |
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| 作者单位： | 1. 天津大学化工学院,绿色合成与转化教育部重点实验室,天津,300072
2. 天津出入境检验检疫局化矿实验室,天津,300456 |
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| 摘 要： | 通过对VulcanXC-72炭黑进行不同条件的处理获得了具有不同表面化学性质的载体,使用比表面积(BET)、傅里叶变换红外光谱(FT-IR)、酸碱滴定等技术手段对载体的物理化学性质进行了表征。以甲醛为还原剂,氯铂酸为前驱体,经过前处理的VulcanXC-72炭黑为载体,制备了Pt/C电催化剂,利用X射线衍射(XRD)、透射电子显微镜(TEM)技术对催化剂进行了表征,考察了炭黑的不同处理条件对Pt/C催化剂分散性的影响。实验发现VulcanXC-72炭黑经过处理后,表面酸性含氧官能团的含量有较大的变化;使用官能团含量较低的炭黑(N2处理)作为载体制备的Pt/C催化剂,Pt颗粒分散性较高,并在单体电池性能测试中显示了最高的催化活性。
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| 关 键 词： | 电催化剂 铂 分散性 炭黑 表面含氧官能团 |
| 文章编号： | 1002-087X(2005)12-0801-04 |
| 修稿时间： | 2005年3月5日 |
Effect of the pre-treatment for carbon supports on platinum dispersion in Pt/C catalysts |
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| JIA Rong-li,WANG Cheng-yang,WANG Su-mei.Effect of the pre-treatment for carbon supports on platinum dispersion in Pt/C catalysts[J].Chinese Journal of Power Sources,2005,29(12):801-804. |
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| Authors: | JIA Rong-li WANG Cheng-yang WANG Su-mei |
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| Abstract: | A series of carbon supports with different surface chemical nature were prepared with the pre-treatment of Vulcan XC-72 carbon black,and characterized by BET,FTIR and acid-base titration.The above pre-treatment carbon supported Pt/C electrocatalysts were prepared by the impregnation-reduction method,with formaldehyde as the reducing agent,H2PtCl6 as the precursor.The effect of the pre-treatment of Vulcan XC-72 carbon black on platinum dispersion was studied by the characterization with XRD and TEM technologies.The experimental investigation confirmed that the pre-treatment of carbon black had an important effect on the amount of surface oxygen groups,and decreasing in amount of surface oxygen groups would favor platinum particles dispersion in Pt/C electrocatalysts.Platinum electrocatalyst supported on N2-treated carbon showed the highest electrocatalytic activity. |
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| Keywords: | electrocatalysts platinum dispersion carbon black surface oxygen groups |
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