3D-ordered catalytic nanoarrays interlocked on anion exchange membranes for water electrolysis

Wan, Lei; Liu, Jing; Lin, Dongcheng; Xu, Ziang; Zhen, Yihan; Pang, Maobing; Xu, Qin; Wang, Baoguo

doi:10.1039/d4ee00003j

Energy Environ. Sci.

2024

DOI: 10.1039/d4ee00003j

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3D-ordered catalytic nanoarrays interlocked on anion exchange membranes for water electrolysis

Lei Wan,

Jing Liu,

Dongcheng Lin

et al.

Abstract: High-performance membrane electrode assemblies (MEAs) have significant importance for developing anion exchange membrane (AEM) water electrolysis, however, the fabrication of nanostructured MEAs to increase catalyst utilization, maximize three-phase boundaries, enhance...

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Salt precipitation and water flooding intrinsic to electrocatalytic CO₂ reduction in acidic membrane electrode assemblies: fundamentals and remedies

Bai,

Xiong,

Zhang

et al. 2024

EES. Catal.

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Salt precipitation and water flooding intrinsic to electrocatalytic CO₂ reduction in acidic membrane electrode assemblies: fundamentals and remedies

Bai,

Xiong,

Zhang

et al. 2024

EES. Catal.

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Electrochemical Performance of a Hybrid NiCo2O4@NiFelt Electrode at Different Operating Temperatures and Electrolyte pH

Niyati,

Moranda,

Beigzadeh Arough

et al. 2024

Energies

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Transition metals such as nickel and cobalt as an alternative to Pt and Pd can be used for oxygen evolution reactions (OERs) and hydrogen production reactions (HERs) in alkaline environments, facilitating green hydrogen production as a sustainable alternative to fossil fuels. In this study, an NiCo2O4 catalyst was produced by a sono-hydrothermal method using urea as a hydrolysis agent. The electrochemical performance of the catalyst-coated NiFelt electrode was evaluated at different KOH concentrations (0.25, 0.5, and 1 M) and four operating temperatures in the interval of 20–80 °C. The electrode characteristics were investigated via electrochemical spectroscopy (cyclic voltammetry, EIS, multistep chronopotentiometry, multistep chronoamperometry) using two different reference electrodes (Ag/AgCl and Hg/HgO), to obtain insight into the anodic and cathodic peaks. XRD, SEM, EDS, and TEM analyses confirmed the purity, structure, and nanoscale particle size (20–45 nm) of the NiCo2O4 catalyst. The electrode showed symmetric CV with Ag/AgCl, making this reference electrode more appropriate for capacitance measurements, while Hg/HgO proved advantageous for EIS in alkaline solutions due to reduced noise. The overpotential of the catalyst-coated NiFelt decreased by 108 mV at 10 mA/cm2 compared to bare NiFelt, showing a good potential for its application in anion exchange membranes and alkaline electrolyzers at an industrial scale.

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3D-ordered catalytic nanoarrays interlocked on anion exchange membranes for water electrolysis

Abstract: High-performance membrane electrode assemblies (MEAs) have significant importance for developing anion exchange membrane (AEM) water electrolysis, however, the fabrication of nanostructured MEAs to increase catalyst utilization, maximize three-phase boundaries, enhance...

Cited by 2 publications

References 40 publications

Salt precipitation and water flooding intrinsic to electrocatalytic CO₂ reduction in acidic membrane electrode assemblies: fundamentals and remedies

Salt precipitation and water flooding intrinsic to electrocatalytic CO₂ reduction in acidic membrane electrode assemblies: fundamentals and remedies

Electrochemical Performance of a Hybrid NiCo2O4@NiFelt Electrode at Different Operating Temperatures and Electrolyte pH

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3D-ordered catalytic nanoarrays interlocked on anion exchange membranes for water electrolysis

Abstract: High-performance membrane electrode assemblies (MEAs) have significant importance for developing anion exchange membrane (AEM) water electrolysis, however, the fabrication of nanostructured MEAs to increase catalyst utilization, maximize three-phase boundaries, enhance...

Cited by 2 publications

References 40 publications

Salt precipitation and water flooding intrinsic to electrocatalytic CO2 reduction in acidic membrane electrode assemblies: fundamentals and remedies

Salt precipitation and water flooding intrinsic to electrocatalytic CO2 reduction in acidic membrane electrode assemblies: fundamentals and remedies

Electrochemical Performance of a Hybrid NiCo2O4@NiFelt Electrode at Different Operating Temperatures and Electrolyte pH

Contact Info

Product

Resources

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Salt precipitation and water flooding intrinsic to electrocatalytic CO₂ reduction in acidic membrane electrode assemblies: fundamentals and remedies

Salt precipitation and water flooding intrinsic to electrocatalytic CO₂ reduction in acidic membrane electrode assemblies: fundamentals and remedies