Effect of morphology and impact of the electrode/electrolyte interface on the PEC response of Fe<sub>2</sub>O<sub>3</sub> based systems – comparison of two preparation techniques

Asha, K. S.; Satsangi, Vibha R.; Shrivastav, Rohit; Kant, Rama; Dass, Sahab

doi:10.1039/d0ra07870k

Cited by 18 publications

(11 citation statements)

References 54 publications

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“…The PEDOT electrodes polymerized at different cycles has a similar surface morphology as shown in Figures c and S6. Also, it appears in a flower-like morphology with high porousness that would be favorable for improving the active sites at the electrode/electrolyte interface Figure d shows the cross-sectional image of the PEDOT grown on the graphite foil within 15 cycles and the average thickness is around 10–12 μm.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Also, it appears in a flower-like morphology with high porousness that would be favorable for improving the active sites at the electrode/electrolyte interface. 51 Figure 2d shows the cross-sectional image of the PEDOT grown on the graphite foil within 15 cycles and the average thickness is around 10−12 μm. However, the thickness is controllable by adjusting the CV cycles, as shown in Figure S7.…”

Section: Synthesis and Characterization Of Pedot Electrodesmentioning

confidence: 99%

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Efficient PEDOT Electrode Architecture for Continuous Redox-Flow Desalination

Karthick

Zhu

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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Both low-energy consumption and high salt removal rate are highly required in the electrochemical desalination. In this work, a conducting polymer poly(3,4-ethylene-dioxythiophene), i.e., PEDOT, is electrochemically decorated on a graphite foil as an electrode material of redox-flow desalination (RFD). At a current density of 2 mA•cm −2 , the energy consumption of the RFD is reduced to 38.1 kJ•mol −1 with PEDOT-modified electrodes, compared with 154.5 kJ•mol −1 using a bare graphite electrode. Meanwhile, the salt removal rate is enhanced to 1.54 μmol•cm −2 •min −1 using the PEDOT electrode from 1.11 μmol•cm −2 •min −1 in the bare graphite electrode. The PEDOT electrodes can also provide excellent cycling stability. The improved performance may be due to the promising conductivity and porous structure of PEDOT, which would supply more active sites between the electrode and the redox electrolyte. The current research provides an electrochemical desalination strategy with low energy consumption and high salt removal rate, which is significant for the development of RFD technology.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Synthesis and Characterization Of Pedot Electrodesmentioning

confidence: 99%

Efficient PEDOT Electrode Architecture for Continuous Redox-Flow Desalination

Karthick

Zhu

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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“…Furthermore, the E – t measurements for AR-TiO 2 NTs, AR-5AuCu/TiO 2 NTs, and AR-10AuCu/TiO 2 NTs in the dark and under visible and UV–vis light illumination are shown in Figure S6. In general, for one type of electrode material, the changes recorded in the open circuit potential provide information about charge transfer recombination kinetics . ΔOCP for AR-TiO 2 NTs between the dark and UV–vis light is equal to ca.…”

Section: Methodsmentioning

confidence: 99%

“…In general, for one type of electrode material, the changes recorded in the open circuit potential provide information about charge transfer recombination kinetics. 63 ΔOCP for AR-TiO 2 NTs between the dark and UV−vis light is equal to ca. 300 mV, whereas for AR-10AuCu/ TiO2NTs, it is equals to ca.…”

Section: ■ Experimental Sectionmentioning

confidence: 98%

Influence of Annealing Atmospheres on Photoelectrochemical Activity of TiO₂ Nanotubes Modified with AuCu Nanoparticles

Lipińska

Grochowska

Ryl

et al. 2021

ACS Appl. Mater. Interfaces

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In this article, we studied the annealing process of AuCu layers deposited on TiO2 nanotubes (NTs) conducted in various atmospheres such as air, vacuum, argon, and hydrogen in order to obtain materials active in both visible and UV–vis ranges. The material fabrication route covers the electrochemical anodization of a Ti plate, followed by thin AuCu film magnetron sputtering and further thermal treatment. Scanning electron microscopy images confirmed the presence of spherical nanoparticles (NPs) formed on the external and internal walls of NTs. The optical and structural properties were characterized using UV–vis, X-ray diffraction, and X-ray photoelectron spectroscopies. It was proved that thermal processing under the argon atmosphere leads to the formation of a CuAuTi alloy in contrast to materials fabricated in air, vacuum, and hydrogen. The electrochemical measurements were carried out in NaOH using cyclic voltammetry, linear voltammetry, and chronoamperometry. The highest photoactivity was achieved for materials thermally treated in the argon atmosphere. In addition, the Mott–Schottky analysis was performed for bare TiO2 NTs and TiO2 NTs modified with gold copper NPs indicating a shift in the flatband potential. Overall, thermal processing resulted in changes in optical and structural properties as well as electrochemical and photoelectrochemical activities.

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“…The use of electrochemical analysis remains a cost effective and simple method to determine the concentration of electroactive species in solution [1]. The morphology, size of the electrode and the fabrication method utilised play a major role in determining the electrochemical response of the system [2,3]. One way to modify such systems is to use carbon nanomaterials and enzymes.…”

Section: Introductionmentioning

confidence: 99%

Diamine Oxidase-Conjugated Multiwalled Carbon Nanotubes to Facilitate Electrode Surface Homogeneity

Amin

Abdullah

Rowley‐Neale

et al. 2022

Sensors

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Carbon nanomaterials have gained significant interest over recent years in the field of electrochemistry, and they may be limited in their use due to issues with their difficulty in dispersion. Enzymes are prime components for detecting biological molecules and enabling electrochemical interactions, but they may also enhance multiwalled carbon nanotube (MWCNT) dispersion. This study evaluated a MWCNT and diamine oxidase enzyme (DAO)-functionalised screen-printed electrode (SPE) to demonstrate improved methods of MWCNT functionalisation and dispersion. MWCNT morphology and dispersion was determined using UV-Vis spectroscopy (UV-Vis) and scanning electron microscopy (SEM). Carboxyl groups were introduced onto the MWCNT surfaces using acid etching. MWCNT functionalisation was carried out using 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC) and N-Hydroxysuccinimide (NHS), followed by DAO conjugation and glutaraldehyde (GA) crosslinking. Modified C-MWNCT/EDC-NHS/DAO/GA was drop cast onto SPEs. Modified and unmodified electrodes after MWCNT functionalisation were characterised using optical profilometry (roughness), water contact angle measurements (wettability), Raman spectroscopy and energy dispersive X-ray spectroscopy (EDX) (vibrational modes and elemental composition, respectively). The results demonstrated that the addition of the DAO improved MWCNT homogenous dispersion and the solution demonstrated enhanced stability which remained over two days. Drop casting of C-MWCNT/EDC-NHS/DAO/GA onto carbon screen-printed electrodes increased the surface roughness and wettability. UV-Vis, SEM, Raman and EDX analysis determined the presence of carboxylated MWCNT variants from their non-carboxylated counterparts. Electrochemical analysis demonstrated an efficient electron transfer rate process and a diffusion-controlled redox process. The modification of such electrodes may be utilised for the development of biosensors which could be utilised to support a range of healthcare related fields.

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Effect of morphology and impact of the electrode/electrolyte interface on the PEC response of Fe₂O₃ based systems – comparison of two preparation techniques

Abstract: Schematic representation of comparative morphological studies conducted on Fe2O3 based systems at different pHs.

Cited by 18 publications

References 54 publications

Efficient PEDOT Electrode Architecture for Continuous Redox-Flow Desalination

Efficient PEDOT Electrode Architecture for Continuous Redox-Flow Desalination

Influence of Annealing Atmospheres on Photoelectrochemical Activity of TiO₂ Nanotubes Modified with AuCu Nanoparticles

Diamine Oxidase-Conjugated Multiwalled Carbon Nanotubes to Facilitate Electrode Surface Homogeneity

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Effect of morphology and impact of the electrode/electrolyte interface on the PEC response of Fe2O3 based systems – comparison of two preparation techniques

Abstract: Schematic representation of comparative morphological studies conducted on Fe2O3 based systems at different pHs.

Cited by 18 publications

References 54 publications

Efficient PEDOT Electrode Architecture for Continuous Redox-Flow Desalination

Efficient PEDOT Electrode Architecture for Continuous Redox-Flow Desalination

Influence of Annealing Atmospheres on Photoelectrochemical Activity of TiO2 Nanotubes Modified with AuCu Nanoparticles

Diamine Oxidase-Conjugated Multiwalled Carbon Nanotubes to Facilitate Electrode Surface Homogeneity

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Product

Resources

About

Effect of morphology and impact of the electrode/electrolyte interface on the PEC response of Fe₂O₃ based systems – comparison of two preparation techniques

Influence of Annealing Atmospheres on Photoelectrochemical Activity of TiO₂ Nanotubes Modified with AuCu Nanoparticles