A5057077344- Electrochemical Analysis and Applications
- Conducting polymers and applications
- Corrosion Behavior and Inhibition
- Analytical Chemistry and Sensors
- Electrodeposition and Electroless Coatings
- Acoustic Wave Resonator Technologies
- Monoclonal and Polyclonal Antibodies Research
- Anodic Oxide Films and Nanostructures
- Molecular Junctions and Nanostructures
- Gas Sensing Nanomaterials and Sensors
- Magnetism in coordination complexes
- Hydrogen embrittlement and corrosion behaviors in metals
- Surface Roughness and Optical Measurements
- Solid-state spectroscopy and crystallography
- Advanced Chemical Sensor Technologies
- Glycosylation and Glycoproteins Research
- Water Quality Monitoring and Analysis
- Systemic Lupus Erythematosus Research
- Advanced Biosensing Techniques and Applications
- Ammonia Synthesis and Nitrogen Reduction
- Electrocatalysts for Energy Conversion
- Advanced Sensor and Energy Harvesting Materials
- Non-Destructive Testing Techniques
- Pigment Synthesis and Properties
- Organic and Molecular Conductors Research
Universitat de València
2010-2024
Universitat Politècnica de València
2012-2013
Brazilian Synchrotron Light Laboratory
2009
Sorbonne Université
2005-2008
Centre National de la Recherche Scientifique
2003-2008
Fundación General
2008
Laboratoire Interfaces et Systèmes Électrochimiques
2005-2007
The presumably soluble KFe+3[Fe2+(CN)6] structure of electrochemically synthesized hexacyanoferrate materials (Prussian Blue) containing K+ ions was determined for the first time in this study. Prior to drawing conclusions from a structural analysis, main goal make precise analysis inferred structure, that is, KFe+3[Fe2+(CN)6], which is frequently referred literature as final stable structure. Indeed, successful X-ray powder diffraction experiment using synchrotron radiation made placed 0.5...
This paper describes the importance of (H2O)6 clusters in controlling properties hexacyanoferrate (Prussian Blue) materials. A careful situ study compositional changes by using electrogravimetric techniques (in ac and dc modes) hexacyanoferrates containing K+ alkali metals reveals existence a changeover these films narrow potential range. Control variation is dependent on stoichiometric number compound structure. However, specific occupation structure activates cluster H3O+ and/or H+,...
The simultaneous recording of three impedance functions (electrochemical impedance, color, and mass impedance) allows the role different species to be distinguished easily during electrochemical processes in conducting electrochromic films. Herein, this technique has been applied study Prussian blue films at several potentials between form (Prussian blue) colorless (Everitt's salt). At these potentials, reactions take place by means exchange ions. Thus, potassium cations is related changes...
Prussian Blue films have been studied by means of ac-electrogravimetry, electrochemical impedance spectroscopy, and quartz crystal microbalance in different aqueous salt solutions. Impedance data was interpreted terms a model based on potential drop at the electrode/film interface film/solution interface. Quantitative results obtained fitting ac-electrogravimetry allow to conclude that main contribution is due dehydration-hydration process cations entering or leaving film.
This paper demonstrates the importance of structural changeover in controlling physical−chemical properties hexacyanometalate-like materials (Prussian Blue). A meticulous situ study compositional variations using electroacoustic impedance techniques associated to electrogravimetric hexacyanoferrates containing K+ alkali metals reveals existence a nanostructural coupled change magnetic these electromagnetic materials. In same way, can be useful both understanding and monitoring changeovers...
The derivative of the voltabsommetric scans, together with previous nano-electrogravimetric and X-ray diffraction results, allow different electrochemical processes to be distinguished during Prussian blue (PB) voltammetric scan. Potassium, proton, hydrated proton counterions involved in PB electrochemistry are related here reactions specific Fe sites. Potassium show two sites for their insertion: one located crystalline framework another ferrocyanide vacancies. From monitoring electroactive...
Technical details concerning the simultaneous acquisition of three impedance functions (electrochemical spectroscopy, alternating current electrogravimetry or mass impedance, and colorimetry color impedance) are presented. The analysis each type function gives interesting information about species participating during electrochemical processes. Furthermore, obtaining in situ allows crossed to be calculated. These especially useful detecting delays between color, mass, electrical charge...
On the basis of structure electrochemically prepared hexacyanometallate compounds, which was determined very recently and unexpectedly to be an insoluble (Bueno, P. R.; et al. J. Phys. Chem. C 2008, 112, 13264), a more detailed picture electrochromic switching mechanism in this kind compound proposed. It demonstrated that changeover is closely related process. Specifically, it shown coloring process changeover. Furthermore, by means spectra-electrochemistry measurements complement with...
The conversion process of "insoluble" prussian blue (PB) films into the "soluble" structure has been followed by simultaneous measurement current and mass changes during voltammetric experiments focusing on possibilities use instantaneous mass/electrical charge ratio at each potential. A similar procedure was used for analysis mechanism reduction PB to Everitt's salt form follow partial dissolution iron species oxidation yellow form. possibility covering Nafion membranes, which make...
This paper develops a framework for the interpretation of ionic insertion/deinsertion reactions in an aqueous environment taking place transition-metal hexacyanoferrates general formula K(h)[Fe(2+) (CN)(6)](l).mH(2)O, also called Prussian Blue. Three different processes were fully separated electrochemistry these films. It was clearly identified that one electrochemical involves H(3)O(+) (hydrated protons) through channels (CN)(6)](l).mH(2)O structure to reach film electroneutrality during...
Poly-(Azure A) films deposited on indium−tin oxide electrodes were simultaneously characterized by visible/near-infrared spectroscopy and EIS techniques at different polarization potentials pH. The instantaneous variation of the absorbance with potential (dA/dE) 685 875 nm was correlated kinetic parameters obtained from analysis electrochemical impedance results (dΓH+(E)/dE GA-). Thus, relative participation hydrogen ion anions quantified in each chemical step coupled to successive...
The electrochemical transformation of the soluble form Prussian blue (PB) material from insoluble was monitored using electrochemical, gravimetric, acoustic, and spectroscopic techniques simultaneously. described combination in situ represents an innovative tool for measurement electrochemistry, which provides complementary information on systems. insoluble-to-soluble PB process takes place during successive voltammetric cycles between mixed valence fully reduced [Everitt's salt (ES)]. One...
Copper electrodissolution and electrodeposition were studied by means of gravimetric quartz crystal microbalance electric (cyclic voltammetry) combined measurements. Relevant information on the mechanism these electrochemical processes is provided analysis experimental data particularly mass change per charge unit. The copper take place two consecutive monoelectronic transfers where anion participation in reaction specified. Besides, it proved that presence molecular oxygen solution...
Abstract The biosensor, named “virusmeter” in this study, integrates quartz crystal microbalance technology with an immune-functionalized chip to distinguish between symptomatic patients respiratory diseases and healthy individuals by analyzing exhaled air samples. Renowned for its compact design, rapidity, noninvasive nature, device yields results within a 5-min timeframe. Evaluated under controlled conditions 54 hospitalized COVID-19 128 control subjects, the biosensor demonstrated good...
A general function for the faradaic impedance associated to a two consecutive single electron transfer mechanism followed by irreversible first-order step has been obtained on basis of formal kinetics. Kinetic parameters this reaction can be from different kind plots function: Nyquist, Cole-Cole, and Bode plots. strategy obtaining all is suggested analyzed detailed flowchart.
The present paper quantifies and develops the kinetic aspects involved in mechanism of interplay between electron ions presented elsewhere1 for KhFek[Fe(CN)6]l·mH2O (Prussian Blue) host materials. Accordingly, there are three different electrochemical processes PB materials: H3O+, K+, H+ insertion/extraction mechanisms which here were fully kinetically studied by means use combined electronic mass transfer functions as a tool to separate all processes. was very important validate confirm...