Lecture
Time-Resolved Raman spectroelectrochemistry: a powerful combination of electrochemistry and spectroscopy for chemical analysis
- at -
- ICM Saal 3
Lecture description
David Ibáñez, David Hernández-Santos, Pablo Fanjul-Bolado.
Llanera (Asturias) SpainTime-resolved Raman spectroelectrochemistry is a versatile and powerful technique that integrates the dynamic control of electrochemical processes with the molecular specificity of Raman spectroscopy. The synergy between electrochemical and Raman perspectives allows the in-situ optical characterization of a huge variety of systems and processes. Moreover, Surface-Enhanced Raman Scattering (SERS) effect produces a huge enhancement of Raman intensity due to the presence of metallic nanostructures (typically gold, silver, platinum, or copper). This phenomenon has significantly expanded the applicability of Raman techniques for analytical chemistry by overcoming the sensitivity limitation of conventional Raman spectroscopy.
In-situ electrochemical generation of metal nanostructures is an attractive strategy for designing advanced materials with SERS properties. This work focuses on the electrochemical formation of metal nanoparticles (NPs) on gold and silver electrodes. For instance, the electrochemical activation of gold SPEs involves an initial oxidation of the metal surface to generate aurous and auric complexes, followed by a reduction scan that produces nanostructures with enhancement properties. Additionally, the presence of chloride ions in solution is essential to boost Raman intensity through the formation of gold NPs [1]. Additionally, the electrochemical activation of silver electrodes was also optimized. A similar protocol is found to yield the highest Raman intensity with silver NPs. These nanostructures with SERS activity are generated through an initial oxidation of the electrode surface, followed by reduction in the presence of chloride [2].
These protocols have shown excellent results in the detection of analytes such as fentanyl drug, pesticides, vitamins and enzymes, demonstrating this technique as a powerful tool for chemical analysis.
References
[1] D. Ibáñez, M.B. González-García, D. Hernández-Santos, P. Fanjul-Bolado, Spectrochimica Acta Part A, 248, 2021, 119174.
[2] D. Martín-Yerga, A. Pérez-Junquera, M.B. González-García, J.V. Perales-Rondon, et al., Electrochimica Acta, 264, 2018, 183.
Llanera (Asturias) SpainTime-resolved Raman spectroelectrochemistry is a versatile and powerful technique that integrates the dynamic control of electrochemical processes with the molecular specificity of Raman spectroscopy. The synergy between electrochemical and Raman perspectives allows the in-situ optical characterization of a huge variety of systems and processes. Moreover, Surface-Enhanced Raman Scattering (SERS) effect produces a huge enhancement of Raman intensity due to the presence of metallic nanostructures (typically gold, silver, platinum, or copper). This phenomenon has significantly expanded the applicability of Raman techniques for analytical chemistry by overcoming the sensitivity limitation of conventional Raman spectroscopy.
In-situ electrochemical generation of metal nanostructures is an attractive strategy for designing advanced materials with SERS properties. This work focuses on the electrochemical formation of metal nanoparticles (NPs) on gold and silver electrodes. For instance, the electrochemical activation of gold SPEs involves an initial oxidation of the metal surface to generate aurous and auric complexes, followed by a reduction scan that produces nanostructures with enhancement properties. Additionally, the presence of chloride ions in solution is essential to boost Raman intensity through the formation of gold NPs [1]. Additionally, the electrochemical activation of silver electrodes was also optimized. A similar protocol is found to yield the highest Raman intensity with silver NPs. These nanostructures with SERS activity are generated through an initial oxidation of the electrode surface, followed by reduction in the presence of chloride [2].
These protocols have shown excellent results in the detection of analytes such as fentanyl drug, pesticides, vitamins and enzymes, demonstrating this technique as a powerful tool for chemical analysis.
References
[1] D. Ibáñez, M.B. González-García, D. Hernández-Santos, P. Fanjul-Bolado, Spectrochimica Acta Part A, 248, 2021, 119174.
[2] D. Martín-Yerga, A. Pérez-Junquera, M.B. González-García, J.V. Perales-Rondon, et al., Electrochimica Acta, 264, 2018, 183.
