研究了不同分散程度的双壁碳纳米管(DWCNTs)作为载体沉积Pt,得到了尺寸2.08 nm的Pt颗粒均匀分散于DWCNTs表面.这种尺寸与分散状态的Pt颗粒相比其样品显示了极高的电催化活性(电流密度为0.022 A·cm-2,电化学比表面积为86.38 m2.g-1).进一步的分析表明,载体在溶液中的浓度对形成Pt颗粒的尺寸和分布具有重要影响,这种尺寸与分散状态的Pt颗粒可以实现高电催化活性和低成本的Pt催化剂制备.
This study investigated different dispersed double-walled carbon nanotubes (DWCNTs) as supports for depositing Pt nanoparticles.Homogenously dispersed Pt particles with sizes of approximately 2.08 nm were obtained on DWCNT surfaces.The size and the dispersion state of the Pt particles on the DWCNT support exhibit stronger hydrogen desorption/adsorption peaks and higher electrochemical activity (electric current density is 0.022 A·cm-2 and electrochemical specific surface area is 86.38 m2·g-1) compared to the other Pt/DWCNT catalysts.Further analysis shows that the concentration of the support in the suspension significantly affects the size and the uniformity of the generated Pt particles.The Pt particles of the size and the state on the supports can realize a Pt catalyst with high electrochemical activity and low cost.
参考文献
| [1] | Zhao ZZ;Fang X;Li YL;Wang Y;Shen PK;Xie FY;Zhang X .The origin of the high performance of tungsten carbides/carbon nanotubes supported Pt catalysts for methanol electrooxidation[J].Electrochemistry communications,2009(2):290-293. |
| [2] | Wang C;Daimon H;Lee Y;Kim J;Sun S .Synthesis of monodisperse Pt nanocubes and their enhanced catalysis for oxygen reduction[J].Journal of the American Chemical Society,2007(22):6974-6975. |
| [3] | Teng XW;Yang H .Synthesis of platinum multipods: An induced anisotropic growth[J].Nano letters,2005(5):885-891. |
| [4] | Seo, M.H.;Choi, S.M.;Kim, H.J.;Kim, W.B. .The graphene-supported Pd and Pt catalysts for highly active oxygen reduction reaction in an alkaline condition[J].Electrochemistry communications,2011(2):182-185. |
| [5] | Hsieh CT;Lin JY;Yang SY .Carbon nanotubes embedded with PtRu nanoparticles as methanol fuel cell electrocatalysts[J].Physica, E. Low-dimensional systems & nanostructures,2009(3):373-378. |
| [6] | Ma J;Wang JN .Purification of single-walled carbon nanotubes by a highly efficient and nondestructive approach[J].Chemistry of Materials: A Publication of the American Chemistry Society,2008(9):2895-2902. |
| [7] | Lee SJ.;McBreen J.;Rho YW.;Kho YT.;Lee TH.;Mukerjee S. .Effects of Nafion impregnation on performances of PEMFC electrodes[J].Electrochimica Acta,1998(24):3693-3701. |
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