An in situ SERS investigation of the chemical states of sulfur species adsorbed onto Pt from different sulfur sources

作者：Xu Bolian; Park In Su; Li Ying; Chen De Jun; Tong YuYe J^*

来源：Journal of Electroanalytical Chemistry, 2011, 662(1): 52-56.

DOI：10.1016/j.jelechem.2011.02.031

• Sulfur adsorption
• In situ SERS
• Polycrystalline Pt electrode

The paper reports in situ surface enhanced Raman scattering (SERS) spectroelectrochemistry study of sulfur adsorption and electro-oxidation on highly roughened polycrystalline Pt surface. It is intended to address a specific question: Does the final chemical state of the adsorbed sulfur species depend on the initial chemical state of the sulfur in deposition sources? Three different sulfur deposition sources were used: Na(2)S solution, electrochemically reductive SO(2) solution, and S(0) suspension. In all cases, the same dominant vibrational band at 300 cm(-1) was observed on the freshly prepared S-adsorbed Pt electrode. indicating the same chemical state of the adsorbed sulfur which was recently assigned as the Pt-S(2-). Possible spill-over sulfur adsorption from the deposited solid polymeric S(8)(0) was observed. Overall, this work yielded important information on sulfur adsorption and electro-oxidation on roughened, polycrystalline platinum surfaces and demonstrated clearly the applicability and usefulness of the in situ SERS spectroelectrochemistry in investigating the chemistry of sulfur adsorption/poisoning on platinum surfaces.

• 出版日期2011-11-1
• 单位南京大学