以用溶胶凝胶法制备的碳气凝胶(CA)作为催化剂载体,用间歇微波法制备了碳气凝胶载铂催化剂.用电感耦合等离子光谱仪(ICP)测定了催化剂中Pt的含量,用透射电镜(TEM)和X射线衍射(XRD)对催化剂的形貌、粒径分布以及颗粒粒度进行了表征.结果表明,碳气凝胶载铂催化剂粒子分布均匀,粒径集中,平均粒经为4 nm.用能量散射X射线能谱(EDX)分析了催化剂的化学成分,用循环伏安法、线形扫描伏安法和计时电流法对催化剂的电化学性能进行了表征.结果表明,以碳气凝胶为载体的催化剂比以活性炭为载体的催化剂具有更高的催化活性.
参考文献
| [1] | V.M.Barragan,A.Heinzel,Estimation of the membrane methanol diffusion coefficient from open circuit voltage measurements in a direct methanol fuel cell,Journal of Power Sources,104(1),66(2002) |
| [2] | J.Larminie,A.Dicks,Zhu Hong,Fuel Cell Systems Explained,(Beijing,Science Press,2006) p.55 |
| [3] | R.W.Pekala,Low density resorcinol-formaldehyde aerogels,USA Patent 4873218(1989) |
| [4] | R.Saliger,U.Fischer,C.Herta,J.Fricke,High surface area carbon aerogeis for supereapacitors,Journal of Noncrystalline Solids,225(1),81(1998) |
| [5] | C.H.Liang,G.Y.Sha,S.C.Guo,Resorcinol-formaldehyde aerogels prepared by supereritical acetone drying,Journal of Non-crystalline Solids,271(1-2),167(2000) |
| [6] | D.C.Wu,R.W.Fu,S.T.Zhang,M.Dresselhaus,G.Dreeselhaus,Preparation of low-density carbon aerogeis by ambient pressure drying,Carbon,42(10),2033(2004) |
| [7] | W.X.Chen,J.Y.Lee,Z.L.Liu,Microwave-assisted synthesis of carbon supported Pt aanoparticles for fuel cell applications,Chem.Commun.,21,2588(2002) |
| [8] | Z.L.LIn,J.Y.Lee,W.X.Chen,M.Han,L.M.Gan,Physical and electrochemical characterizations of microwaveassisted polyol preparation of carbon-supported PtRu nanoparticles,Langmuir,20(1),181(2004) |
| [9] | J.F.Zhu,Y.J.Zhu,Microwave-assisted one-step synthesis of polyacrylamide-metal (M=Ag,Pt,Cu) nanocomposites in Ethylene Glycol,J.Phys.Chem.B,110(17),8593(2006) |
| [10] | Y.L.Hsin,K.C.Hwang,C.T.Yeh,Poly(vinylpyrrolidone)modified graphite carbon nanofibers as promising supports for PtRu catalysts in direct methanol fuel cells,J.Am.Chem.Soc.,129(32),9999(2007) |
| [11] | Y.Xie,H.Meng,P.K.Shen,Diffusion study in novel threedimensional electrode for direct methanol fuel cells,Electrochimi.Acta,53,5039(2008) |
| [12] | S.J.Guo,S.J.Dong,E.K.Wang,Constructing carbon nanotube/Pt nanopaxticle hybrids using an imidazolinm-saltbased ionic liquid as a linker,Advanced Materials,22(11),1269(2010) |
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%