Electrochemical detection of methanol dissociative adsorption at Pt/C surface by using porous-microelectrodes

被引：4
作者：
Kashima, K
Umeda, M
Yamada, A
Uchida, I
机构：
[1] Nagaoka Univ Technol, Fac Engn, Dept Chem, Nagaoka, Niigata 9402188, Japan
[2] Tohoku Univ, Grad Sch Engn, Dept Appl Chem, Aoba Ku, Sendai, Miyagi 9808579, Japan
来源：
ELECTROCHEMISTRY | 2006年 / 74卷 / 02期
关键词：
Pt/C; surface reaction; methanol electrooxidation; primary process;
D O I：
10.5796/electrochemistry.74.166
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The methanol dissociative adsorption at a Pt-loading carbon (Pt/C) electrocatalyst for direct methanol fuel cell has been investigated by electrochemical measurements using a porous microelectrode (PME) and porous/disk-dual microelectrode (P/D-ME). The proton elimination reaction based on the methanol dissociative adsorption during the primary process of the methanol electrooxidation on a Pt/C surface, especially at Pt (100), has been observed by PME measurements. Furthermore, by using the P/D-ME, we have succeeded for the first time in the electrochemical detection of protons dissociated from methanol molecules into the bulk solution due to the above reaction.
引用
收藏
页码：166 / 168
页数：3
相关论文
共 11 条
[1]   ON NATURE OF REDUCED CARBON DIOXIDE [J].
BREITER, MW .
ELECTROCHIMICA ACTA, 1967, 12 (09) :1213-&
[2]   TEMPERATURE-DEPENDENT METHANOL ELECTROOXIDATION ON WELL-CHARACTERIZED PT-RU ALLOYS [J].
GASTEIGER, HA ;
MARKOVIC, N ;
ROSS, PN ;
CAIRNS, EJ .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1994, 141 (07) :1795-1803
[3]   Electrocatalysis of methanol oxidation [J].
Iwasita, T .
ELECTROCHIMICA ACTA, 2002, 47 (22-23) :3663-3674
[4]   AN FTIR STUDY OF THE CATALYTIC ACTIVITY OF A 85-15 PT-RU ALLOY FOR METHANOL OXIDATION [J].
IWASITA, T ;
NART, FC ;
VIELSTICH, W .
BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1990, 94 (09) :1030-1034
[5]   Composition and activity of high surface area PtRu catalysts towards adsorbed CO and methanol electrooxidation - A DEMS study [J].
Jusys, Z ;
Kaiser, J ;
Behm, RJ .
ELECTROCHIMICA ACTA, 2002, 47 (22-23) :3693-3706
[6]   Porous/disk-dual microelectrode: Preparation and electrochemical detection of methanol electrooxidation product at Pt/C powder electrocatalyst [J].
Kashima, K ;
Umeda, M ;
Yamada, A ;
Uchida, I .
CHEMISTRY LETTERS, 2004, 33 (12) :1622-1623
[7]   Electrochemical detection of protons produced in an electrode reaction using interdigitated microarray electrodes [J].
Ojima, H ;
Umeda, M ;
Mohamedi, M ;
Uchida, I .
ELECTROANALYSIS, 2003, 15 (21) :1677-1681
[8]   The influence of the oxygen-containing species on the electrooxidation of the C1-C4 alcohols at some platinum single crystal surfaces in alkaline solution [J].
Tripkovic, AV ;
Popovic, KD ;
Lovic, JD .
ELECTROCHIMICA ACTA, 2001, 46 (20-21) :3163-3173
[9]   Porous-microelectrode study on Pt/C catalysts for methanol electrooxidation [J].
Umeda, M ;
Kokubo, M ;
Mohamedi, M ;
Uchida, I .
ELECTROCHIMICA ACTA, 2003, 48 (10) :1367-1374
[10]  
VAYENAS CG, 2001, ELECTROCHEMICAL ACTI, pCH6
12