Effect of metal ad-layers on Au(111) electrodes on electrocatalytic oxidation of glucose in an alkaline solution

被引:102
作者
Ben Aoun, S
Dursun, Z
Koga, T
Bang, GS
Sotomura, T
Taniguchi, I
机构
[1] Kumamoto Univ, Fac Engn, Dept Appl Chem & Biochem, Kumamoto 8608555, Japan
[2] Matsushita Elect Ind Co Ltd, Osaka 5708501, Japan
关键词
glucose oxidation; gluconolactone; electrocatalytic activity; Au(111) electrode; upd; pzc;
D O I
10.1016/j.jelechem.2003.12.022
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Glucose oxidation in a 0.1 M NaOH solution at Au(111) single crystal electrodes modified with various ad-metals (Cu, Ag, Ru, Pt, Pd and Cd) by underpotential deposition (upd) was investigated. Ag ad-atoms of 1/3 monolayer (ML) onto the Au(111) surface showed the highest catalytic activity for glucose oxidation: The peak potential for glucose oxidation to gluconolactone (two-electron oxidation) was around -0.40 V vs. Ag\AgCl\KCl(sat), and the catalytic effect of this electrode on the oxidation of gluconolactone was also observed around -0.1 V vs. Ag\AgCl\KCl(sat) to give formate as the main product in a 0.1 M NaOH solution. Full coverage of Ag ad-atoms, however, led to a decrease in peak current with no marked shift in potential for glucose oxidation, but suppressed the oxidation of gluconolactone significantly. Cu ad-atoms modified Au(111) electrodes showed a slight negative shift of the pre-peak in the oxidation of glucose with a small oxidation current and a main oxidation peak appeared around -0.04 V vs. Ag\AgCl\KCl(sat). Cd ad-atoms gave similar activity at a bare Au(111) electrode, whereas Ru and Pt ad-atoms showed a considerable decrease in oxidation current. Pd ad-atoms gave negative catalytic activity. Double layer capacitance measurements revealed that the shift of the potential of zero charge (pzc) between bare Au(111) and Ag ad-atom modified Au(111) electrodes (the pzc shifted negatively by modification of Ag) was of great help in the explanation of the observed catalytic activities, where the number of AuOH sites on the Au(111) surface would be important for the oxidation of glucose and gluconolactone. (C) 2004 Published by Elsevier B.V.
引用
收藏
页码:175 / 183
页数:9
相关论文
共 41 条
[1]  
Alvarez Rizatti M., 1983, J ELECTROANAL CHEM, V144, P351
[2]   Electrocatalytic oxidation of sugars on silver-UPD single crystal gold electrodes in alkaline solutions [J].
Aoun, SB ;
Bang, GS ;
Koga, T ;
Nonaka, Y ;
Sotomura, T ;
Taniguchi, I .
ELECTROCHEMISTRY COMMUNICATIONS, 2003, 5 (04) :317-320
[3]  
AZDIC RR, 1989, J ELECTROANAL CHEM, V260, P475
[4]   INSITU INFRARED STUDIES OF GLUCOSE-OXIDATION ON PLATINUM IN AN ALKALINE-MEDIUM [J].
BAE, IT ;
YEAGER, E ;
XING, X ;
LIU, CC .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1991, 309 (1-2) :131-145
[5]   Formic acid oxidation on ultrathin Pd films on Au(hkl) and Pt(hkl) electrodes [J].
Baldauf, M ;
Kolb, DM .
JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (27) :11375-11381
[6]   OXIDATION OF METHANOL ON A PLATINUM-ELECTRODE IN ALKALINE-MEDIUM - EFFECT OF METAL AD-ATOMS ON THE ELECTROCATALYTIC ACTIVITY [J].
BEDEN, B ;
KADIRGAN, F ;
LAMY, C ;
LEGER, JM .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1982, 142 (1-2) :171-190
[7]   Metal monolayer deposition by replacement of metal adlayers on electrode surfaces [J].
Brankovic, SR ;
Wang, JX ;
Adzic, RR .
SURFACE SCIENCE, 2001, 474 (1-3) :L173-L179
[8]   OXIDATION OF FORMIC-ACID ON NOBLE-METAL ELECTRODES .2. COMPARISON OF BEHAVIOR OF PURE ELECTRODES [J].
CAPON, A ;
PARSONS, R .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1973, 44 (02) :239-254
[9]   Examination of Pt(111)/Ru and Pt(111)/Os surfaces: STM imaging and methanol oxidation activity [J].
Crown, A ;
Moraes, IR ;
Wieckowski, A .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2001, 500 (1-2) :333-343
[10]   The electro-oxidation of carbon monoxide on ruthenium modified Pt(111) [J].
Davies, JC ;
Hayden, BE ;
Pegg, DJ ;
Rendall, ME .
SURFACE SCIENCE, 2002, 496 (1-2) :110-120