Thin Nickel Coatings on Stainless Steel for Enhanced Oxygen Evolution and Reduced Iron Leaching in Alkaline Water Electrolysis DOI Creative Commons
Yashwardhan Deo, Niklas Thissen, Vera Seidl

et al.

Electrochemical Science Advances, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 8, 2024

ABSTRACT One of the most mature technologies for green hydrogen production is alkaline water electrolysis. However, this process kinetically limited by sluggish oxygen evolution reaction (OER). Improving OER kinetics requires electrocatalysts, which can offer superior catalytic activity and stability in environments. Stainless steel (SS) has been reported as a cost‐effective promising electrode due to its ability form active Ni‐Fe oxyhydroxides during OER. it high Fe‐to‐Ni ratio, leading severe Fe‐leaching This affects not only but also be detrimental electrolyzer system. Therefore, we investigate effect different Ni‐coatings on both pure Ni‐ SS‐supports activity, while monitoring extent continuous operation. We show that thin layers Ni enable enhanced activities compared thicker ones. Especially, less than 1 µm thick layer an SS‐support shows with respect bare supports. X‐ray photoelectron spectroscopy reveals traces oxidized Fe species catalyst surface after OER, suggesting from SS may incorporated into operation, forming very low leaching rate. Utilizing inductively coupled plasma‐optical emission spectroscopy, prove decrease whereas uncoated dissolves electrolyte Thus, stable electrodes obtained maintaining concentration electrolyte. particularly relevant application high‐performance systems.

Language: Английский

A Proof‐of‐Principle Demonstration: Exploring the Effect of Anode Layer Microstructure on the Alkaline Oxygen Evolution Reaction DOI Creative Commons
Adarsh Jain, Christian Marcks,

Lars Grebener

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

Abstract This study explores the effect of nickel cobalt oxide (Ni‐Co‐O) anode layer microstructure on oxygen evolution reaction (OER). Four anodes with similar Ni‐Co‐O loadings and chemical characteristics but distinct morphologies are fabricated by ultrasonic spraying catalyst inks varying solvent composition (pure water versus a water‐ethanol mixture) drying temperatures (50 150 °C) (Ni) plates. Upon composition, particles in water‐based ink exhibited lower stability than water‐ethanol‐based ink, boosting particle connectivity layers. correlated mechanical strength layers, resulting reduced contact resistance enhanced activity. The second observation is that at 50 °C, surface morphology hill‐like islands higher roughness, while concave hemispherical shapes roughness observed. From 2D‐distribution data, it found wettability electrolyte. Roughness increased lyophobicity activity through more accessible active sites efficient bubble transport. work highlights how affects macroscopic properties, these turn can enhance or diminish performance OER compared to bare Ni, offering insights into knowledge‐based design

Language: Английский

Citations

0
Benchmarking performance: A round-robin testing for liquid alkaline electrolysis DOI Creative Commons

Simon Appelhaus,

L. Ritz, Sharon-Virginia Pape

et al.

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 95, P. 1004 - 1010

Published: Nov. 22, 2024

Language: Английский

Citations

3
Thin Nickel Coatings on Stainless Steel for Enhanced Oxygen Evolution and Reduced Iron Leaching in Alkaline Water Electrolysis DOI Creative Commons
Yashwardhan Deo, Niklas Thissen, Vera Seidl

et al.

Electrochemical Science Advances, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 8, 2024

ABSTRACT One of the most mature technologies for green hydrogen production is alkaline water electrolysis. However, this process kinetically limited by sluggish oxygen evolution reaction (OER). Improving OER kinetics requires electrocatalysts, which can offer superior catalytic activity and stability in environments. Stainless steel (SS) has been reported as a cost‐effective promising electrode due to its ability form active Ni‐Fe oxyhydroxides during OER. it high Fe‐to‐Ni ratio, leading severe Fe‐leaching This affects not only but also be detrimental electrolyzer system. Therefore, we investigate effect different Ni‐coatings on both pure Ni‐ SS‐supports activity, while monitoring extent continuous operation. We show that thin layers Ni enable enhanced activities compared thicker ones. Especially, less than 1 µm thick layer an SS‐support shows with respect bare supports. X‐ray photoelectron spectroscopy reveals traces oxidized Fe species catalyst surface after OER, suggesting from SS may incorporated into operation, forming very low leaching rate. Utilizing inductively coupled plasma‐optical emission spectroscopy, prove decrease whereas uncoated dissolves electrolyte Thus, stable electrodes obtained maintaining concentration electrolyte. particularly relevant application high‐performance systems.

Language: Английский

Citations

0