Selective chromium dissolution as an interfacial design strategy for enhanced oxygen evolution activity in CrFeCoNi oxy-carbide films DOI Creative Commons
Tian Xiao,

Koichi Yoshiyama,

Kenji Yoshino

et al.

Discover Electrochemistry., Journal Year: 2025, Volume and Issue: 2(1)

Published: April 17, 2025

Abstract High-entropy compounds have demonstrated remarkable electrocatalytic activity for oxygen evolution reaction (OER) in water. In this study, amorphous FeNi, CrFeNi, and CrFeCoNi oxy-carbide films were prepared using a single-step electrodeposition technique an aqueous medium. Among them, displayed outstanding OER performance, achieving overpotential of 315 mV at current density ( J ) 10 mA cm −2 . At 50 , selective dissolution Cr-species within was observed, which enhanced both stability the film. This oxidative Cr process not only expanded electrochemically active surface area but also facilitated reoxidation Fe, Co, Ni, thereby weakening binding strength intermediates catalytic sites. addition, improved conductivity owing to newly formed metal–metal bonding, promoting electron transfer improving 264 approach mechanism provide effective pathway design development high-entropy compound-based electrocatalysts efficient water electrolysis. Graphical

Language: Английский

Selective chromium dissolution as an interfacial design strategy for enhanced oxygen evolution activity in CrFeCoNi oxy-carbide films DOI Creative Commons
Tian Xiao,

Koichi Yoshiyama,

Kenji Yoshino

et al.

Discover Electrochemistry., Journal Year: 2025, Volume and Issue: 2(1)

Published: April 17, 2025

Abstract High-entropy compounds have demonstrated remarkable electrocatalytic activity for oxygen evolution reaction (OER) in water. In this study, amorphous FeNi, CrFeNi, and CrFeCoNi oxy-carbide films were prepared using a single-step electrodeposition technique an aqueous medium. Among them, displayed outstanding OER performance, achieving overpotential of 315 mV at current density ( J ) 10 mA cm −2 . At 50 , selective dissolution Cr-species within was observed, which enhanced both stability the film. This oxidative Cr process not only expanded electrochemically active surface area but also facilitated reoxidation Fe, Co, Ni, thereby weakening binding strength intermediates catalytic sites. addition, improved conductivity owing to newly formed metal–metal bonding, promoting electron transfer improving 264 approach mechanism provide effective pathway design development high-entropy compound-based electrocatalysts efficient water electrolysis. Graphical

Language: Английский

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