Carbon-supported platinum catalysts were prepared by NaBH4 reduction of metal precursors and the CeO2 nanoparticles were prepared by citric acid sol-gel method. The structure and morphology of two kinds of nanoparticles were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM), respectively. The Pt particles were uniformly dispersed on the carbon surface and showed the rod-like morphology. The CeO2 was spherical in shape. The appropriate amount of CeO2 nanoparticles was added into Pt/C systems to improve activity of the catalysts. Several electrochemical techniques such as cyclic voltammogram (CV), chronoamperometry (I-t)and electrochemical impedance spectroscopy (EIS) were used to investigate the properties of CeO2-Pt/C catalysts for methanol electrooxidation in 1 mol/L CH3OH+0.5H2SO4 aqueous solutions. The results revealed that compared with Pt/C catalysts CeO2-pt/C exhibited a higher activity and stability for methanol electro-oxidation. Moreover, the effect of CeO2 content on the activity of Pt/C catalysts was discussed in detail.
参考文献
| [1] | Tang H;Chen J H;Nie L H;Liu D Y Deng W Kuang Y F Yao S Z .High dispersion and electrocatalytic properties of platinum nanoparticles on graphitic carbon nanofibers (GCNFs)[J].Journal of Colloid and Interface Science,2004,269:26. |
| [2] | Raghuveer V.;Xanthopoulos N.;Mathieu HJ.;Viswanathan B.;Thampi KR. .Rare earth cuprates as electrocatalysts for methanol oxidation[J].Solid state ionics,2001(3/4):263-274. |
| [3] | Kawaguchi T;Sugimoto W;Murakami Y;Takasu Y .Temperature dependence of the oxidation of carbon monoxide on carbon supported Pt,Ru,and PtRu[J].Electrochemistry Communications,2004,6:480. |
| [4] | Kuk S T;Wieckowski A .Methanol electrooxidation on platinum spontaneously deposited on unsupported and carbonsupported ruthenium nanoparticles[J].Journal of Power Sources,2005,141:1. |
| [5] | Zeng J H;Lee J Y .Effects of preparation conditions on performance of carbon-supported nanosize Pt-Co catalysts for methanol electro-oxidation under acidic conditions[J].Journal of Power Sources,2005,140:268. |
| [6] | Watanabe M;Motoo S .Electrocatalysis by ad-atoms:Part Ⅱ Enhancement of the oxidation of methanol on platinum by ruthenium ad-atoms[J].Journal of Electroanalytical Chemistry,1975,60:267. |
| [7] | Dinh H N;Ren X;Garzon F H;Zelenay P Gottesfeld S .Electrocatalysis in direct methanol fuel cells:in-situ probing of PtRu anode catalyst surfaces[J].Journal of Electroanalytical Chemistry,2000,491:222. |
| [8] | Wang H;Wingender C;Baltruschat H;Lopez M Reetz M T .Methanol oxidation on Pt,PtRu,and colloidal Pt electrocatalysts:a DEMS study of product formation[J].Journal of Electroanalytical Chemistry,2001,509:163. |
| [9] | Preparation of Pt/NiO-C electrocatalyst and heat-treatment effect on its electrocatalytic performance for methanol oxidation[J].International journal of hydrogen energy,2010(1):313. |
| [10] | Zhao J;Chen W;Zheng Y .Effect of ceria on carbon supported platinum catalysts for methanol electrooxidation[J].Materials Chemistry and Physics,2009,113:591. |
| [11] | Ying Wang;Estevao Rosim Fachini;Gabriel Cruz .Effect of Surface Composition of Electrochemically Codeposited Platinum/Molybdenum Oxide on Methanol Oxidation[J].Journal of the Electrochemical Society,2001(3):C222-C226. |
| [12] | Hepel M;Kumarihamy I;Zhong CJ .Nanoporous TiO2-supported bimetallic catalysts for methanol oxidation in acidic media[J].Electrochemistry communications,2006(9):1439-1444. |
| [13] | Maiyalagan T;Nawaz K F .Electrochemical oxidation of methanol on Pt/V2O5-C composite catalysts[J].Catalyst Communication,2009,10:433. |
| [14] | Yang LX.;Bock C.;MacDougall B.;Park J. .The role of the WOx ad-component to Pt and PtRu catalysts in the electrochemical CH3OH oxidation reaction[J].Journal of Applied Electrochemistry,2004(4):427-438. |
| [15] | El-Shobaky, G.A.;Hassan, H.M.A.;Yehia, N.S.;Badawy, A.R.A.A. .Effect of CeO2-doping on surface and catalytic properties of CuO-ZnO system[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2010(1):32-38. |
| [16] | Li X Z;Chen F;Lu X W;Ni C Y Chen Z G .Modified-EISA synthesis of mesoporous high surface area CeO2 and catalytic property for CO oxidation[J].Journal of Rare Earths,2009,27:943. |
| [17] | Xu Xiuyan;Li Jinjun;Hao Zhengping .CeO_2-Co_3O_4 Catalysts for CO Oxidation[J].Journal of Rare Earths,2006(2):172-176. |
| [18] | A novel co-precipitation method for preparation of Pt-CeO_2 composites on multi-walled carbon nanotubes for direct methanol fuel cells[J].Journal of Power Sources,2010(12):3802. |
| [19] | Zhou Y;Gao Y F;Liu Y C;Liu J R .High efficiency Pt-CeO2/carbon nanotubes hybrid composite as an anode electrocatalyst for direct methanol fuel cells[J].Journal of Power Sources,2010,95:1605. |
| [20] | Scibioh A M;Kim S K;Cho E A;Lim T H Hong S A Ha H Y .Pt-CeO2/C anode catalyst for direct methanol fuel cells[J].Applied Catalysis B:Environmental,2008,84:773. |
| [21] | Wang J S;Deng X Z;Xi JY;Chen L Q Zhu W T Qiu X P .Promoting the current for methanol electro-oxidation by mixing Pt-based catalysts with CeO2 nanoparticles[J].Journal of Power Sources,2007,170:297. |
| [22] | L. X. Yang;R. G. Allen;K. Scott;R. A. Christenson;S. Roy .A study of PtRuO{sub}2 catalysts thermally formed on titanium mesh for methanol oxidation[J].Electrochimica Acta,2005(5):1217-1223. |
| [23] | Watanabe M;Motoo S .Electrocatalysis by ad-atoms:Part Ⅰ Enhancement of the oxidation of methanol on platinum and palladium by gold ad-atoms[J].Journal of Electroanalytical Chemistry,1975,60:259. |
| [24] | Lamy C;Belgsir E M;Léger J M .Electrocatalytic oxidation of aliphatic alcohols:Application to the direct alcohol fuel cell (DAFC)[J].Journal of Applied Electrochemistry,2001,31:799. |
| [25] | Perez J M;Beden B;Hahn F;Aldaz A Lamy C .Influence of the structural state on the anodic dissolution of TA6V alloy in concentrated hydrochloric acid:Handling the results to study the anodic behaviour of welded elements[J].Journal of Electroanalytical Chemistry,1989,262:251. |
| [26] | Hitmi H;Belgsir E M;Léger J M;Lamy C Lezna R O .A kinetic analysis of the electro-oxidation of ethanol at a platinum electrode in acid medium[J].Electrochimica Acta,1994,39:407. |
| [27] | Sugimoto W;Aoyama K;Kawaguchi T;Murakami Y;Takasu Y .Kinetics of CH3OH oxidation on PtRu/C studied by impedance and CO stripping voltammetry[J].Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry,2005(2):215-221. |
| [28] | Hsing I M;Wang X;Leng Y J .Preparation of surfactantstabilized Pt colloids for the synthesis of electrocatalyst in polymer electrolyte fuel cells[J].Journal of the Electrochemical Society,2002,149:A615. |
| [29] | Liu Y C;Qiu X P;Zhu W T;Wu G S .Impedance studies on mesocarbon microbeads supported Pt-Ru catalytic anode[J].Journal of Power Sources,2003,114:10. |
| [30] | Wu G;Li L;Xu B Q .Effect of electrochemical polarization of PtRu/C catalysts on methanol electrooxidation[J].Electrochimica Acta,2004,50:1. |
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%