采用多元醇法和一种新的改进多元醇法制备了用于质子交换膜燃料电池的Pt/C催化剂,并对2种方法制备的催化剂进行了比较.后者是将Pt前驱体先负载至碳黑上,再加入多元醇还原,制备出了粒度分布均匀,分散性好的Pt/C催化剂.利用透射电镜(TEM)、X射线衍射(XRD)以及动态伏安法(CV)表征催化剂的微观组织形貌、物相组成以及电化学性能.研究结果表明,先还原后负载方式的多元醇法制备的Pt/C催化剂容易团聚.而先负载后还原方式制备的Pt/C催化剂则粒度分布均匀,分散性好,粒径大小在1.2 ～3.2 nm,电化学测试也表明,该Pt/C催化剂的质量电流密度为23.42 A/g,具有更高的催化活性.
参考文献
| [1] | 衣宝廉.燃料电池一原理·技术·应用[M].北京:化学工业出版社,2003 |
| [2] | Fievet F;Lagier J P;Figlarz M .Preparing monodisperse metal powders in micrometer and submicrometer sizes by the polyol process[J].MRS Bulletin,1989,14:29. |
| [3] | Sun S;Murray C B;Weller D et al.Monodisperse FePt nanoparticles and ferromagnetic FePt nanocrystal superlattices[J].Science,2000,287:1989-1992. |
| [4] | Elisabete I. Santiago;Laudemir C. Varanda;H. Mercedes Villullas .Carbon-Supported Pt-Co Catalysts Prepared by a Modified Polyol Process as Cathodes for PEM Fuel Cells[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2007(7):3146-3151. |
| [5] | Viau G.;Fievet F.;Fievetvincent F. .NUCLEATION AND GROWTH OF BIMETALLIC CONI AND FENI MONODISPERSE PARTICLES PREPARED IN POLYOLS[J].Solid state ionics,1996(3/4):259-270. |
| [6] | 魏子栋.碳载体上铁与钴对铂的锚定效应[J].电化学,1998(01):42-46. |
| [7] | Pozio A;De Francesco M;Cemmi A.Comparison of high surface Pt/C catalysts by cyclic voltammetry[J].Journal of Power Sources,2002(105):13-19. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%