Applications Spectroélectrochimie
La spectroélectrochimie est une méthode expérimentale qui combine l'électrochimie et la spectroscopie. Elle étudie le processus des réactions électrochimiques avec un contrôle optique simultané. La mesure spectroscopique fournit des informations complémentaires utiles lors d'une mesure électrochimique, telles que les intermédiaires de réaction ou les structures des produits.
Nos experts ont compilé plusieurs documents d'application sur les mesures spectroélectrochimiques. Utilisez les filtres pour rechercher les applications par analyte/paramètre, matrice d'échantillon ou industrie.
- AN-EC-041Studying nickel deposition with EQCM-D and EC-Raman
This application note demonstrates EQCM D for simultaneous mass and dissipation analysis of Ni(OH)₂ electrodeposition.
- AN-RA-006New strategies for obtaining the SERS effect in organic solvents
Many electrochemical methods have been developed but are traditionally limited to aqueous media. Raman spectroelectrochemistry in organic solutions is an interesting alternative, but developing new EC-SERS procedures is still required. This Application Note demonstrates that the electrochemical activation of gold and silver electrodes enables the detection of dyes and pesticides in organic media.
- AN-SEC-001Spectroelectrochemistry: an autovalidated analytical technique
Spectroelectrochemical experiments not only provide outstanding qualitative information about samples, but also offer other quantitative data that can be considered when performing analyses. A single set of experiments allows analysts to obtain two calibration curves: one with the electrochemical data and another with the spectroscopic information. The concentration of tested samples is calculated by using both curves, confirming the obtained results by two different routes. In this Application Note, comparison between electrochemical and spectroscopic determinations demonstrates that the two methods measure uric acid (UA) indistinctively, with close agreement of the calculated values with empirical data.
- AN-EC-033Utilizing hyphenated EC-Raman to study a model system
This Application Note presents a walkthrough of an experiment on 4-nitrothiophenol using hyphenated EC-Raman, a combination of Raman spectroscopy and electrochemistry.
- AN-RA-009Comparison of SPELEC RAMAN and standard Raman microscopes
This Application Note compares SPELEC RAMAN and a standard Raman instrument by analyzing their performance in measuring single-walled carbon nanotubes (SWCNT).
- AN-FLU-002Understanding the mechanism of a bioassay indicator by fluorescence
Alamar Blue is monitored with fluorescence spectroelectrochemistry during its irreversible reduction to resorufin and further reversible reduction to dihydroresorufin.
- AN-RA-008Easy detection of enzymes with the electrochemical-SERS effect
Low sensitivity has limited the use of Raman spectroscopy as a detection method. However, the surface-enhanced Raman scattering (SERS) effect has improved its effectivity for analytical use. Aldehyde dehydrogenase (ALDH) and cytochrome c are analyzed by Raman spectroelectrochemistry as a proof of concept in this Application Note.
- AN-RS-042Revealing battery secrets with EC-Raman solutions
Electrochemical Raman (EC-Raman) spectroscopy enhances comprehension of energy storage devices by tracking physicochemical changes. This note details EC-Raman findings during nickel-metal hydride (NiMH) battery charge and discharge simulations.
- AN-SEC-004Spectroelectrochemical analysis of electrochromic materials
Poly(3,4-ethylenedioxythiophene) (PEDOT) is one of the most promising ICPs due to its high conductivity, electrochemical stability, catalytic properties, high insolubility in almost all common solvents and interesting electrochromic properties (transparent in the doped state and colored in the neutral state). In this Application Note, PEDOT film is evaluated by spectroelectrochemical techniques.
- AN-RA-007Enhancement of Raman intensity for the detection of fentanyl
Fentanyl, a powerful synthetic opioid, is illegally distributed worldwide. Overdosing can be fatal, causing symptoms like stupor, pupil changes, cyanosis, and respiratory failure. Just 2 mg of fentanyl can be lethal, depending on factors like body size and past usage. Given its severe impact, identifying and detecting fentanyl is crucial, as it has become a major public health crisis. Combining electrochemical surface-enhanced Raman spectroscopy (EC-SERS) with screen-printed electrodes (SPEs) offers a fast, effective, and precise method for detecting fentanyl.
- AN-SEC-003UV-Vis spectroelectrochemical cell for conventional electrodes
The development of a novel reflection cell for conventional electrodes facilitates the performance of spectroelectrochemical measurements. This device allows researchers to work in aqueous solutions as well as in organic media due to its chemical resistance.
- AN-EC-031Suivi de l'oxydation du ferrocyanure à l'aide de l'EC-Raman
Cette note d'application met en évidence l'utilisation des solutions Metrohm Hyphenated EC-Raman pour surveiller l'oxydation réversible du ferrocyanure sur une électrode en or. Les variations de l'intensité des bandes en fonction du potentiel peuvent être utilisées pour suivre les changements relatifs du profil de concentration du ferrocyanure et du ferricyanure à la surface de l'électrode pendant la voltampérométrie cyclique (CV).
- AN-SEC-002Gathering information from spectroelectrochemical experiments
In-situ spectroelectrochemistry provides dynamic electrochemical and spectroscopic information concurrently with the redox reaction occurring on the electrode surface. Although different spectroelectrochemical configurations can be used, simple equations explain how to relate electrochemistry and spectroscopy for each experimental setup. This Application Note describes how the quantification of one electrochemical parameter (the diffusion coefficient) is calculated from the spectroscopic data as a proof of this concept.
- AN-RA-005Characterization of single-walled carbon nanotubes by Raman spectroelectrochemistry
Spectroelectrochemistry is a multi-response technique that provides electrochemical and spectroscopic information about a chemical system in a single experiment, i.e., it offers information from two different points of view. Raman spectroelectrochemistry could be considered as one of the best techniques for both the characterization and behavioral understanding of carbon nanotube films, as it has traditionally been used to obtain information about their oxidation-reduction processes as well as the vibrational structure. This application note describes how the SPELEC RAMAN is used to characterize single-walled carbon nanotubes by studying their electrochemical doping in aqueous solution as well as to evaluate their defect density.
- AN-RA-004UV/VIS spectroelectrochemical monitoring of 4-nitrophenol degradation
Spectroelectrochemistry is a multi-response technique that provides both electrochemical and spectroscopic information about a chemical system in a single experiment, i.e., it offers information from two different points of view. Spectroelectrochemistry focused on the UV/VIS region is one of the most important combinations because this allows us to obtain not only valuable qualitative information, but also outstanding quantitative results. In this application note, the degradation kinetics for 4-nitrophenol, a known pollutant, were determined using SPELEC.
- AN-RA-003In situ, fast and sensitive: Electrochemical SERS with screen-printed electrodes
Substrates for surface-enhanced Raman spectroscopy (SERS) are typically fabricated with complex (micro/nano)structures of noble metals, enabling trace level detection of analytes. Due to the high costs and reactivity of these SERS substrates, they often have a limited shelf life. Development of new substrate materials which minimize these issues yet maintain the same performance standards is a constant concern.Screen-printed electrodes can be easily fabricated using different metallic materials with the well-established screen-printing method, leading to mass production of versatile, cost-effective, and disposable devices. In this Application Note, the feasibility of using readily-available screen-printed metal electrodes as suitable substrates for the fast and sensitive detection of different chemical species by in situ electrochemical SERS (EC-SERS) is shown.
- AN-FLU-001Fluorescence spectroelectrochemistry of [Ru(bpy)3]2+/3+ in semi-infinite diffusion regime
Dans cette note d'application, l'instrument Metrohm DropSens SPELEC est utilisé avec le KIT FLUORESCENCE pour la surveillance résolue en temps des réactions électrochimiques dans un régime de diffusion semi-infini en réalisant une spectroélectrochimie de fluorescence du couple redox [Ru(bpy)3]2+/3+.
- AN-DV-001Solutions DropView pour le traitement des résultats électrochimiques et optiques
L'électrochimie, la spectroscopie et la spectroélectrochimie (SEC) sont des techniques largement utilisées dans de nombreux domaines. Cependant, les courbes de données obtenues à partir de ces analyses sont très variées, et tous les pics électrochimiques et toutes les bandes spectroscopiques ne peuvent pas être mesurés avec les mêmes procédures. Cette note d'application examine quatre outils inclus dans les logiciels DropView 8400 et DropView SPELEC pour faciliter la mesure et l'analyse des courbes et des données collectées. Les options de mesure suivantes sont expliquées en détail : mesure automatique, mesure sur la courbe, mesure libre et mesure par palier.
- WP-022Effet SERS in situ avec des électrodes à film épais en argent
Cet ouvrage présente des mesures de spectres électrochimiques Raman à résolution temporelle. L'instrument utilisé combine dans un boîtier, de manière entièrement intégrée, une source laser de longueur d'onde 785 nm, un spectromètre Raman haute résolution et un bipotentiostat/galvanostat. Les essais sont contrôlés par un logiciel de traitement des spectres électrochimiques qui permet une acquisition des données en temps réel et un traitement utile des données.
- WP-046Surmonter la limitation de l'eau en spectroélectrochimie NIR
La spectroscopie proche infrarouge NIR est traditionnellement limitée du fait de l'absorption d'eau dans cette gamme spectrale. C'est ainsi que la bien connue restriction due à l'eau a limité le développement de nouvelles applications pour la spectroélectrochimie NIR. Cette étude propose différentes alternatives intéressantes pour réduire ou même éliminer la contribution aqueuse dans cette gamme spectrale.
