MnO2/CNT Supported Pt and PtRu Nanocatalysts for Direct Methanol Fuel Cells

被引：172
作者：
Zhou, Chunmei [1 ]
Wang, Hongjuan [1 ]
Peng, Feng [1 ]
Liang, Jiahua [1 ]
Yu, Hao [1 ]
Yang, Jian [1 ]
机构：
[1] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Peoples R China
来源：
LANGMUIR | 2009年 / 25卷 / 13期
关键词：
HYDROUS RUTHENIUM OXIDE; POLYOL-SYNTHESIZED PTRU/C; CARBON NANOTUBES; ELECTROCHEMICAL PROPERTIES; ANODE CATALYSTS; IN-SITU; OXIDATION; NANOPARTICLES; ELECTROOXIDATION; CONDUCTIVITY;
D O I：
10.1021/la900250w
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Pt/MnO2/carbon nanotube (CNT) and PtRu/MnO2/CNT nanocomposites were synthesized by successively loading hydrous MnO2 and Pt (or PtRu alloy) nanoparticles on CNTs and were used as anodic catalysts for direct methanol fuel cells (DMFCs). The existence of MnO2 Oil the surface of CNTs effectively increases the proton conductivity of the catalyst, which then could remarkably improve the performance of the catalyst in methanol electro-oxidation. As a result, Pt/MnO2/CNTs show higher electrochemical active surface area and better methanol electro-oxidation activity, compared with Pt/CNTs. As PtRu alloy nanoparticles were deposited oil the surface of MnO2/CNTs instead of Pt. the PtRu/MnO2/CNT catalyst shows not only excellent electro-oxidation activity to methanol with forward anodic peak current density of 901 A/g(Pt) but also good CO oxidation ability with lower preadsorbed CO oxidation onset potential (0.33 V vs Ag/AgCl) and peak potential (0.49 V vs Ag/AgCl) at room temperature.
引用
收藏
页码：7711 / 7717
页数：7
相关论文
共 32 条
[1]   Novel nanocomposite Pt/RuO2•xH2O/carbon nanotube catalysts for direct methanol fuel cells [J].
Cao, Lin ;
Scheiba, Frieder ;
Roth, Christina ;
Schweiger, Franz ;
Cremers, Carsten ;
Stimming, Ulrich ;
Fuess, Hartmut ;
Chen, Liquan ;
Zhu, Wentao ;
Qiu, Xinping .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2006, 45 (32) :5315-5319
[2]   Metamorphosis of the mixed phase PtRu anode catalyst for direct methanol fuel cells after exposure of methanol: In situ and ex situ characterizations [J].
Chakraborty, Debasish ;
Chorkendoff, Ib ;
Johannessen, Tue .
JOURNAL OF POWER SOURCES, 2007, 173 (01) :110-120
[3]   Synthesis of hydrous ruthenium oxide supported platinum catalysts for direct methanol fuel cells [J].
Chen, ZG ;
Qiu, XP ;
Lu, B ;
Zhang, SC ;
Zhu, WT ;
Chen, LQ .
ELECTROCHEMISTRY COMMUNICATIONS, 2005, 7 (06) :593-596
[4]   Effect of crystallographic structure of MnO2 on its electrochemical capacitance properties [J].
Devaraj, S. ;
Munichandraiah, N. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (11) :4406-4417
[5]   Charge storage mechanism of sonochemically prepared MnO2 as supercapacitor electrode:: Effects of physisorbed water and proton conduction [J].
Ghaemi, M. ;
Ataherian, F. ;
Zolfaghari, A. ;
Jafari, S. M. .
ELECTROCHIMICA ACTA, 2008, 53 (14) :4607-4614
[6]   Nanostructure PtRu/MWNTs as anode catalysts prepared in a vacuum for direct methanol oxidation [J].
Gu, Yan-Juan ;
Wong, Wing-Tak .
LANGMUIR, 2006, 22 (26) :11447-11452
[7]   The durability of polyol-synthesized PtRu/C for direct methanol fuel cells [J].
Guo, Junsong ;
Sun, Gongquan ;
Wu, Zhimou ;
Sun, Shiguo ;
Yan, Shiyou ;
Cao, Lei ;
Yan, Yushan ;
Su, Dangsheng ;
Xin, Qin .
JOURNAL OF POWER SOURCES, 2007, 172 (02) :666-675
[8]   Polyol-synthesized PtRu/C and PtRu black for direct methanol fuel cells [J].
Guo, Junsong ;
Sun, Gongquan ;
Sun, Shiguo ;
Yan, Shiyou ;
Yang, Weiqian ;
Qi, Jing ;
Yan, Yushan ;
Xin, Qin .
JOURNAL OF POWER SOURCES, 2007, 168 (02) :299-306
[9]   Promotion of platinum-ruthenium catalyst for electrooxidation of methanol by crystalline ruthenium dioxide [J].
Huang, Sheng-yang ;
Chang, Chia-ming ;
Wang, Kuan-wen ;
Yeh, Chuin-tih .
CHEMPHYSCHEM, 2007, 8 (12) :1774-1777
[10]   Improved performance of direct methanol fuel cells by anodic treatment [J].
Jeon, Min Ku ;
Won, Jung Yeon ;
Woo, Seong Ihl .
ELECTROCHEMICAL AND SOLID STATE LETTERS, 2007, 10 (01) :B23-B25
1234