Determination of different local potentials of zero charge of a Pd-Au(111) heterogeneous surface

被引：25

作者：

Alvarez, B ^{[1
]}

Climent, V ^{[1
]}

Feliu, JM ^{[1
]}

Aldaz, A ^{[1
]}

机构：

[1] Univ Alicante, Dept Quim Fis, E-03080 Alicante, Spain

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2000年 / 2卷 / 06期

关键词：

local potential of zero charge; Au(111); palladium adlayer; CO displacement; potential of zero total charge; potential of zero free charge;

D O I：

10.1016/S1388-2481(00)00051-5

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Local values of potential of zero charge (pzc) and potential of zero total charge (pztc) have been determined for Au( 111) surfaces partially covered with palladium at low coverages. The pztc of the palladium islands has been measured with the CO charge displacement procedure. The adsorption of CO only takes place on the palladium-covered domains allowing us to selectively displace the charge residing in this part of the surface. The resulting pztc values of the palladium islands are located around 0.25 V for the entire range of palladium coverages. The pzc of gold-uncovered areas has been determined by identifying the position of the differential capacity minimum (0.52 V). It appears that this pzc is only slightly affected by the presence of deposited palladium. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：427 / 430

页数：4

共 22 条

[1]

[Anonymous], MOD ASPECT ELECTROC

[2] ANION-SURFACE INTERACTIONS .3. N2O REDUCTION AS A CHEMICAL PROBE OF THE LOCAL POTENTIAL OF ZERO TOTAL CHARGE [J].