Electrochemistry of Porous Materials

Carbó, Antonio Doménech

doi:10.1201/9781439806340

Cited by 19 publications

(7 citation statements)

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“…62 It is interesting to point out that the zeolites could exhibit electronic and ionic conductivity immersed in a solution. 63,64 Consequently, the dielectric response at high frequencies can also be related to a contribution given by the electrochemical interaction of the zeolite with the solution. 33 In fact, other zeolitebased coatings evidenced quite similar impedance values at high frequencies.…”

Section: Electrochemical Impedance Spectroscopy Testmentioning

confidence: 99%

Electrochemical behavior of hydrophobic silane–zeolite coatings for corrosion protection of aluminum substrate

et al. 2014

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The anticorrosive properties of a silanezeolite composite coating applied on a 6061 aluminum substrate was investigated. The composite film, deposited by dip-coating technique, was prepared with different contents of SAPO34 powder (60-90 wt%) with the purpose of evaluating the protective action offered by the zeolite-filled silane matrix. Corrosion protection performance, during immersion in 3.5% NaCl solution, was evaluated by means of a potentiodynamic polarization test and electrochemical impedance spectroscopy (EIS). The coating evidenced good barrier properties and high hydrophobicity. The addition of zeolite in the silane matrix induced, as expected, a reduction of cathodic and anodic current. The zeolite improved the barrier properties of the hybrid sol-gel films, enhancing the resistance to localized corrosion attacks. Better results were observed for the sample with 80 wt% of zeolite filler that evidenced still acceptable protective action after 3 days of immersion in the sodium chloride solution.

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Section: Electrochemical Impedance Spectroscopy Testmentioning

confidence: 99%

Electrochemical behavior of hydrophobic silane–zeolite coatings for corrosion protection of aluminum substrate

et al. 2014

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“…The agreement between the mixed potential (in a solution containing hydrogen sulfide and sulfur dioxide mix (H 2 S,SO 2 ) ≈ 570 mV and the potential calculated from the intersection of the partial curves mix (calculate) = 532 mV) is very good, since the deviations for porous electrodes of around Δ ∼ 30 mV are acceptable [33]. This agreement is an indication of the electrochemical mechanism of the process.…”

Section: Electrochemical Mechanismmentioning

confidence: 53%

A Method for the Simultaneous Cleansing of H₂S and SO₂

Uzun

Razkazova-Velkova

Beschkov

et al. 2016

International Journal of Electrochemistry

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A method for the simultaneous electrochemical purification of hydrogen sulfide and sulfur dioxide from sea water or industrial wastes is proposed. Fundamentally the method is based on the electrochemical affinity of the pair H2S and SO2. The reactions (oxidation of H2S and reduction of SO2) proceed on а proper catalyst in a flow reactor, without an external power by electrochemical means. The partial curves of oxidation of H2S and reduction of SO2have been studied electrochemically on different catalysts. Following the additive principle the rate of the process has been found by intersection of the curves. The overall process rate has been studied in a flow type reactor. Similar values of the process rate have been found and these prove the electrochemical mechanism of the reactions. As a result the electrochemical method at adequate conditions is developed. The process is able to completely convert the initial reagents (concentrationsCH2S, SO2=0), which is difficult given the chemical kinetics.

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“…Besides these three classes of experimental methods, a few more techniques such as chronoamperometry, coulometry, differential pulse voltammetry and scanning electrochemical microscopy can be used for characterizing porous electrodes. 82 Understanding the morphological effect on electrochemical responses has been mostly relying on the theoretical approach. However, reliable knowledge of nanoporous electrochemistry should have obvious limitation without experimental investigation and evidence.…”

Section: Electrochemical Studies On the Morphological Effect Of Nanopmentioning

confidence: 99%

Electrochemistry at nanoporous interfaces: new opportunity for electrocatalysis

Bae

Han

Chung

2012

Phys. Chem. Chem. Phys.

169

132

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Physical and electrochemical features of nanoporous electrodes arising from their morphology are presented in this perspective. Although nanoporous electrodes have been used to enhance electrocatalysis for several decades, the origin of their capability was understood on the basis of enlarged surface area or crystalline facet. However, considerable attention should be paid to the fact that nano-confined space of nanoporous electrodes can significantly affect electrochemical efficiency. Molecular dynamics in nano-confined spaces is capable of offering much more chances of interaction between a redox molecule and an electrode surface. The mass transport in the nanoporous electrode depends on various pore characteristics such as size, shape, charge, connectivity, and symmetry as well as molecular properties such as size, charge, and kinetics. Moreover, when the pore size is comparable to the thickness of an electric double layer (EDL), the EDLs overlap in the porous structure so that electrochemically effective surface area is not the same as that of the real electrode surface. These unique properties come from simply nanoporous structure and suggest new opportunity to innovative electrocatalysts in the future.

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Electrochemistry of Porous Materials

Cited by 19 publications

References 0 publications

Electrochemical behavior of hydrophobic silane–zeolite coatings for corrosion protection of aluminum substrate

Electrochemical behavior of hydrophobic silane–zeolite coatings for corrosion protection of aluminum substrate

A Method for the Simultaneous Cleansing of H₂S and SO₂

Electrochemistry at nanoporous interfaces: new opportunity for electrocatalysis

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Electrochemistry of Porous Materials

Cited by 19 publications

References 0 publications

Electrochemical behavior of hydrophobic silane–zeolite coatings for corrosion protection of aluminum substrate

Electrochemical behavior of hydrophobic silane–zeolite coatings for corrosion protection of aluminum substrate

A Method for the Simultaneous Cleansing of H2S and SO2

Electrochemistry at nanoporous interfaces: new opportunity for electrocatalysis

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Product

Resources

About

A Method for the Simultaneous Cleansing of H₂S and SO₂