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Citation: ZHANG Jun-Song, LI Hai-Tao, TANG Ya-Wen, CHEN Yu, BAO Jian-Chun, ZHOU Yi-Ming, LU Tian-Hong. Preparation and Electrocatalytic Activity of Pt Catalysts Supported on Nanotubes with Thick and Thin Walls for Methanol Oxidation[J]. Chinese Journal of Applied Chemistry, ;2008, 25(3): 290-294. shu

Preparation and Electrocatalytic Activity of Pt Catalysts Supported on Nanotubes with Thick and Thin Walls for Methanol Oxidation

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a College of Chemistry and Environment Science, Nanjing Normal University, Nanjing 210097;
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b Wujin College, Jiangsu Electronic University, Wujin;
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c Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022

Corresponding author: LU Tian-Hong,
Received Date: 8 June 2007
Available Online: 16 October 2007
Fund Project: 国家自然科学基金(20573057,20473038,20433060) (20573057,20473038,20433060)江苏省科技厅基金(BK2006224) (BK2006224)江苏省教育厅基金(05KJB150061)资助项目 (05KJB150061)

CNTs with 5 nm wall thickness and 140~220 nm tube diameter as well as CNTs with 50 nm wall thickness and 80~200 nm tube diameter were prepared,and the effects of the pretreatment of the two kinds of CNTs with concentrated HNO₃ on the structure and surface groups of the CNTs were studied.It was found that after the pretreatment,the amount of the charge and discharge of the double electrode layer for the CNTs with the thick wall(Q_d) and the amount of the electricity for the oxidation of the oxygen-containing groups on the CNTs surface(Q_o) increased by 1.34 and 0.098 mC,respectively,while for the CNTs with the thin wall,they increased by 5.69 and 0.175 mC,respectively.The result indicates that the CNTs with the thin wall are easier to break apart and the carbon atoms on the wall surface easier to oxidize when the CNTs are treated with concentrated HNO₃.When the Pt particles obtained with the general liquid phase reduction method were deposited on the CNTs surfaces pretreated,the Pt particles were easier to uniformly adsorb on the surface of the CNTs with the thin wall,due to the fact that the specific surface area of the CNTs with the thin wall after the pretreatment was larger and the content of the oxygen-containing groups was higher.Therefore,the electrocatalytic activity of the Pt catalyst supported on the CNTs with the thin wall after the pretreatment was very high for methanol oxidation.
- Pt catalyst,
- carbon nanotube,
- methanol,
- direct methanol fuel cell
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