A Comparison on Structural Sensitive Adsorption of Sb on Au Single Crystalline Electrodes

Authors

Jia-wei YANG, State Key Laboratory of Physical Chemistry of Solid Surfaces, Chemistry Department, Xiamen University, Xiamen 361005, China;
Wang-huo SHANG, State Key Laboratory of Physical Chemistry of Solid Surfaces, Chemistry Department, Xiamen University, Xiamen 361005, China;
Qiong WU, State Key Laboratory of Physical Chemistry of Solid Surfaces, Chemistry Department, Xiamen University, Xiamen 361005, China;
Bing-wei MAO, State Key Laboratory of Physical Chemistry of Solid Surfaces, Chemistry Department, Xiamen University, Xiamen 361005, China;

Corresponding Author

Jia-wei YANG

Abstract

We compare the behaviors of irreversible adsorption of Sb(III) and its reduction, underpotential deposition of Sbon Au(111) and Au(100) as well as mutual interactions of the processes. Based on in-situ scanning tunneling microscopic and cyclic voltammetric results, the substrate structure not only influence anion adsorptionbehavior and thus the Sb adsorption structure, but also the stability of its own structure. On Au(111) surface,the irreversibly adsorbed dense and disordered SbO~(+ )film structure remains after reduction of the film; while on Au(100)surface, due to the coadsorption of SO_4~(2-),an ordered(2×2)structure is formed after reduction.UPD of Sb on Au(111)is accompanied by significant surface alloying, which destroys the ordered structure of the Au (111) surface;while on Au(100)surface,the lattice type and lattice constantare in good match with that of the (100)plane of the stable AuSb2 alloy. Therefore the interaction between Au and Sb appears in the form of ordered surface compound, and surface alloying can be avoided during the process of UPD. The results further reflect the sensitivity as well as importance of the substrate structure.

Keywords

Sb, Au(111), Au(100), Irreversible adsorption, Underpotential deposition, In-situ STM

DOI Link

https://doi.org/10.61558/2993-074X.1629

Publication Date

2005-05-28

Online Available Date

2005-05-28

Revised Date

2005-05-28

Received Date

2005-05-28

Recommended Citation

Jia-wei YANG, Wang-huo SHANG, Qiong WU, Bing-wei MAO. A Comparison on Structural Sensitive Adsorption of Sb on Au Single Crystalline Electrodes[J]. Journal of Electrochemistry, 2005 , 11(2): 140-145.
DOI: 10.61558/2993-074X.1629
Available at: https://jelectrochem.xmu.edu.cn/journal/vol11/iss2/5

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