| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 219423 | Journal of Electroanalytical Chemistry | 2011 | 5 Pages |
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: Na2S solution, electrochemically reductive SO2 solution, and S0 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–S2−. Possible spill-over sulfur adsorption from the deposited solid polymeric S80 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.
► We did in situ SERS study on sulfur covered roughened polycrystalline Pt surface. ► Adsorbed sulfur was generated from three different sources. ► The same Raman vibrational band at 300 cm−1 was observed in all cases. ► The chemical state of adsorbed sulfur was independent of the sources.
