Liquid-diffusion electrode with core-shell structured mixed metal oxide catalyst for near-zero polarization in chlor-alkali electrolysis

Lim, Heon Kil; Park, Jae Hyun; Yan, Bingyi; Kim, Jin Young; Lee, Chan Woo

doi:10.1016/j.apcatb.2022.122095

Cited by 11 publications

(3 citation statements)

References 82 publications

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“…Undoubtedly, it is true in terms of theoretical basis, safety aspects, and overall operating cost; however, the complex process cycle, sluggish reaction kinetics, and mostly the expensive catalyst materials result in a very high specic investment cost per metric ton of chlorine. 10,52,53 Although this approach is energy-efficient and relatively safe but, at the same time, it has several challenges such as.…”

Section: Challenges Of Cer-orr-coupled Hcl Electrolysismentioning

confidence: 99%

Recent advances in energy-efficient chlorine production via HCl electrolysis

Kafle,

Gupta,

Mehta

et al. 2024

J. Mater. Chem. A

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Section: Challenges Of Cer-orr-coupled Hcl Electrolysismentioning

confidence: 99%

Recent advances in energy-efficient chlorine production via HCl electrolysis

Kafle,

Gupta,

Mehta

et al. 2024

J. Mater. Chem. A

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“…Electrolysis of a concentrated sodium chloride (brine) solution, which produces chlorine gas and sodium hydroxide, is one of the most common industrial electrolytic processes worldwide 1 . Chlorine is essential for water disinfection and is used to assemble polyvinyl chloride (PVC), as well as in the production of a variety of other chlorinated polymers, solvents, and specialized compounds 2 .…”

Section: Introductionmentioning

confidence: 99%

Green synthesis and characterization of binary, ternary, and quaternary Ti/MMO anodes for chlorine and oxygen evolution reactions

Abdel-Aziz,

Heakal,

El Nashar

et al. 2024

Sci Rep

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Dimensionally stable anodes of titanium (Ti) metal coated with mixed metal oxides (MMO) are widely used in several electrochemical applications, especially chloro-alkali electrolysis. Herein, we deposited MMO coatings on Ti substrates in different compositions, namely, (60%RuO2-40%TiO2), (60%RuO2-30%TiO2-10%IrO2), and (60%RuO2-20%TiO2-15%IrO2-5%Ta2O5), where RuO2 has the same percentage ratio in all coatings. The aim was to use these electrodes for chlorine evolution reaction (CER) and oxygen evolution reaction (OER) applications. Electrochemical characterization of the coated samples was performed to identify the best Ti/MMO electrodes with the highest efficiencies among the various prepared combinations. The role of IrO2 and Ta2O5 in enhancing corrosion resistance and electrochemical efficacy was up for debate. Scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analyses were exploited to determine the surface morphology, chemical composition, crystallinity, surface composition, and chemical states of the acquired coatings. The differential scanning calorimetry (DSC) method was used to evaluate the apparent activation energy ($${{\text{E}}}_{{\text{a}}}$$ E a ) of the deposited MMO. Additionally, the electrochemical performance of our designed coatings was scrutinized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), a current on–off test, a CV stability test (ST), and an accelerated stability test (AST). Furthermore, linear sweep voltammetry (LSV) was incorporated to assess the catalytic efficacy of the prepared anodes toward the CER in a brine solution of pH 2 and the OER in 1 M H2SO4. It became clear that the CER and OER incurred almost the same potential value (1.1 V) on both Ti/RuO2-TiO2 and Ti/RuO2-TiO2-IrO2 electrodes. However, on the Ti/RuO2-TiO2-IrO2-Ta2O5 anode, there was a 0.2 V potential difference between the CER occurring at 1.1 V and the OER happening at 1.3 V.

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“…These properties significantly influence the electrochemical behavior and capabilities of electrochemical devices . A few common core materials used in developing electrodes include carbon-based materials, conducting polymers, metal oxides, mixed metal oxides, metal carbides, and nitrides. , Among all those materials, mixed metal oxides can be afforded as a better core material, as it can optimize the material property, and the synergistic effect from mixed metal oxides attracts the development of high-performance supercapacitors. − Hence, as a mixed metal oxide, the spinel structure material comes into play.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured ZnCo₂O₄@NiMn-LDH Electrodes for Supercapacitor and Zinc-Air Battery Application

Bhanuse,

Kumar,

et al. 2024

ACS Appl. Nano Mater.

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Herein, we have developed a two-step hydrothermal reaction to fabricate core−shell nanostructured ZnCo 2 O 4 @NiMn-LDH on nickel foam. The electrode material composition is optimized by different feed ratios of Ni in the shell structure, which is composed of NiMn-LDH. In three-electrode electrochemical analysis, ZnCo 2 O 4 @NiMn-LDH (2:1) exhibited a specific capacitance of 5165 F/g at a current density of 1 A/g in 6 M KOH electrolyte. Moreover, the rate capability of retention of ZnCo 2 O 4 @NiMn-LDH (2:1) reached 80% at a current density of 4 A/g. Finally, a solid-state asymmetric supercapacitor is assembled by using ZnCo 2 O 4 @NiMn-LDH as the positive electrode and α-Fe 2 O 3 as the negative electrode placed inside the Swagelok cell device with a separator. The fabricated supercapacitor ZnCo 2 O 4 @ NiMn-LDH (2:1)||α-Fe 2 O 3 exhibits an energy density of 64.6 Wh/kg at a power density of 748 W/kg and a cyclic stability of 97.9% after 3000 cycles. For the zinc−air battery (ZAB) application, ZnCo 2 O 4 @NiMn-LDH (2:1) delivered a lower overpotential of 390 mV at a 50 mA/cm 2 current density with good stability in an alkaline medium. It exhibited a power density of 43 mW/cm 2 with stability throughout the 200 h. Both applications suggest that ZnCo 2 O 4 @NiMn-LDH is considered an efficient nanostructured electrode for energy applications.

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Liquid-diffusion electrode with core-shell structured mixed metal oxide catalyst for near-zero polarization in chlor-alkali electrolysis

Cited by 11 publications

References 82 publications

Recent advances in energy-efficient chlorine production via HCl electrolysis

Recent advances in energy-efficient chlorine production via HCl electrolysis

Green synthesis and characterization of binary, ternary, and quaternary Ti/MMO anodes for chlorine and oxygen evolution reactions

Nanostructured ZnCo₂O₄@NiMn-LDH Electrodes for Supercapacitor and Zinc-Air Battery Application

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Liquid-diffusion electrode with core-shell structured mixed metal oxide catalyst for near-zero polarization in chlor-alkali electrolysis

Cited by 11 publications

References 82 publications

Recent advances in energy-efficient chlorine production via HCl electrolysis

Recent advances in energy-efficient chlorine production via HCl electrolysis

Green synthesis and characterization of binary, ternary, and quaternary Ti/MMO anodes for chlorine and oxygen evolution reactions

Nanostructured ZnCo2O4@NiMn-LDH Electrodes for Supercapacitor and Zinc-Air Battery Application

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Product

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Nanostructured ZnCo₂O₄@NiMn-LDH Electrodes for Supercapacitor and Zinc-Air Battery Application