Investigation of methanol electrooxidation on Pt and Pt-Ru in H3PO4 using MEA with PBI-H3PO4 membrane

被引：6
|
作者：
Modestov, A. D. [1 ]
Tarasevich, M. R. [1 ]
Pu, Hongting [2 ]
机构：
[1] Russian Acad Sci, AN Frumkin Inst Phys Chem & Electrochem, Moscow 119071, Russia
[2] Tongji Univ, Inst Funct Polymers, Sch Mat Sci & Engn, Shanghai 201804, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2012年 / 205卷
关键词：
PBI; DMFC; Methanol; Electrooxidation; Pt; Pt-Ru; FUEL-CELL; IN-SITU; ELECTROCHEMICAL OXIDATION; TEMPERATURE-DEPENDENCE; CARBON-MONOXIDE; PLATINUM; CO; ELECTRODES; ACID; RUTHENIUM;
D O I：
10.1016/j.jpowsour.2012.01.089
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Electrochemical oxidation of methanol on Pt/C and Pt-Ru/C electrocatalysts was studied by slow scan rate voltammetry at 130-190 degrees C. The effects of partial pressures of water, methanol, and CO on the methanol electrooxidation rate were determined. It was found that methanol oxidation on Pt-Ru/C proceeds primarily via the "indirect" route through the formation of strongly adsorbed intermediate COads, while on Pt methanol electrooxidation occurs primarily via "direct" route through the formation of weakly adsorbed intermediates. At 140 degrees C activity of Pt-Ru/C in methanol electrooxidation was found 2 orders of magnitude higher than that of Pt/C. Methanol oxidation reaction orders per water and methanol vapor pressures were determined. The main features of methanol electrooxidation both on Pt and Pt-Ru were accounted for assuming Langmuir-Hinshelwood mechanism of respective RDS. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：207 / 214
页数：8
相关论文
共 50 条
  • [21] ELECTROCATALYTIC OXIDATION OF FORMIC-ACID ON PT BINARY AND TERNARY ELECTRODES IN H3PO4
    ELSHAFEI, AA
    SHABANAH, HM
    MOUSSA, MNH
    JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1993, 362 (1-2): : 159 - 165
  • [22] O2 reduction at the Pt/Nafion interface in 85% concentrated H3PO4
    Chu, D
    ELECTROCHIMICA ACTA, 1998, 43 (24) : 3711 - 3718
  • [23] H3PO4 cleaning vs phosphatizing
    不详
    MATERIALS PERFORMANCE, 1999, 38 (12) : 62 - 62
  • [24] Systematic characterization of a PBI/H3PO4 sol-gel membrane-Modeling and simulation
    Siegel, C.
    Bandlamudi, G.
    Heinzel, A.
    JOURNAL OF POWER SOURCES, 2011, 196 (05) : 2735 - 2749
  • [25] COMPUTATIONAL STUDIES OF CRYSTALLINE H3PO4
    MOSS, GR
    SOUHASSOU, M
    BLESSING, RH
    ESPINOSA, E
    LECOMTE, C
    ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1995, 51 : 650 - 660
  • [26] ADSORPTION BEHAVIOR OF H3PO4, H2PO4-, AND CF3SO3- IONS ON PLATINUM - AN ELLIPSOMETRIC INVESTIGATION
    HYDE, PJ
    GOTTESFELD, S
    SRINIVASAN, S
    JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1983, 130 (08) : C333 - C333
  • [27] Pt4ZrO2/C cathode catalyst with excellent durability for high temperature PEMFC based on H3PO4 doped PBI
    Liu, Gang
    Zhang, Huamin
    Ma, Yuanwei
    PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-3, 2007, 561-565 : 1589 - 1592
  • [28] Pt4ZrO2/C cathode catalyst for improved durability in high temperature PEMFC based on H3PO4 doped PBI
    Liu, Gang
    Zhang, Huamin
    Zhai, Yunfeng
    Zhang, Yu
    Xu, Dongyan
    Shao, Zhi-gang
    ELECTROCHEMISTRY COMMUNICATIONS, 2007, 9 (01) : 135 - 141
  • [29] Hydrolysis of tetracalcium phosphate in H3PO4 and KH2PO4
    Matsuya, S
    Takagi, S
    Chow, LC
    JOURNAL OF MATERIALS SCIENCE, 1996, 31 (12) : 3263 - 3269
  • [30] An investigation on calcium phosphate conversions in water and H3PO4 solutions
    Golubina, LV
    Komissarova, LN
    Pushkina, GY
    ZHURNAL NEORGANICHESKOI KHIMII, 1996, 41 (03): : 376 - 381
12345