期刊
ELECTROCHIMICA ACTA
卷 55, 期 28, 页码 8532-8538出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.07.046
关键词
Underpotential deposition; XAS; Zinc; Phosphate; Au electrode
资金
- Engineering and Physical Sciences Research Council
- U S Department of Energy by Lawrence Livermore National Laboratory [W-7405-Eng-48, DE-AC52-07NA27344]
Zn K-edge X-ray absorption spectroscopy (XAS) has been used to investigate the structure of Zn monolayers prepared on Au(1 1 1) electrodes via underpotennal deposition (UPD) from phosphate supporting electrolyte Theoretical modeling of the XAS data indicates that the Zn adatoms adopt a commensurate (root 3 x root 3)R30 degrees (theta(sc) = 0 33) adlayer structure and reside within the 3-fold hollow sites of the Au(1 1 1) surface Meanwhile phosphate counter-ions co-adsorb on the UPD adlayer and bridge between the Zn adatoms in a (root 3 x root 3)R30 (theta(sc) = 0 33) configuration with each phosphorous atom residing above a vacant 3-fold hollow site of the Au(1 1 1) Significantly this surface structure is invariant between the electrochemical potential for UPD adlayer formation and the onset of bulk Zn electrodeposition Analysis of the Zn K-edge absorption onset also presents the possibility that the Zn adatoms do not fully discharge during the process of UPD which had been proposed in prior voltammetnc studies of the phosphate/Zn(UPD)/Au(1 1 1) system (C) 2010 Elsevier Ltd All rights reserved
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据