Corrosion-Engineered Room-Temperature Deposition of NiMoO4/NiS/Ni(OH)2 at Nickel Foam: An Efficient Strategy and Electrocatalyst for the Oxygen Evolution Reaction DOI Creative Commons

Marilia Barreto Dalla Benetta,

Eithne Dempsey, Carmel B. Breslin

et al.

ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 30, 2024

The oxygen evolution reaction (OER) tends to limit the rate of electrolysis water. Accordingly, there is much interest in development electrocatalysts for this important half-reaction. Herein, a NiMoO4/NiS/Ni(OH)2 composite was nucleated directly at nickel foam electrode room temperature and used as an effective electrocatalyst OER. formed aqueous solution thiomolybdate (2.5 mM) dissolved 0.1 M acetate pH 7.5. Its formation facilitated through hydrolysis corrosion foam. Highly adherent deposits were surface throughout porous network give electrochemical active area that approximately 11-fold higher than pristine OER activity NF/NiMoO4/NiS/Ni(OH)2 studied alkaline 1.0 KOH solution. An onset potential 1.47 V vs RHE Tafel slope 110 mV dec–1 observed. required deliver current density 50 mA cm–2 1.56 RHE. Finally, exhibited very good stability over 16 h period.

Language: Английский

Bulk CoCrFeNiAlMo high entropy alloy as high-efficient electrocatalyst in alkaline environment DOI
Xiaoran Huo,

Yuanwu Zhang,

Huishu Yu

et al.

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 87, P. 505 - 514

Published: Sept. 9, 2024

Language: Английский

Citations

1
Carbon Nanofiber-Encapsulated FeCoNiCuMn Sulfides with Tunable S Doping for Enhanced Oxygen Evolution Reaction DOI Open Access

Yuhan Sun,

Chen Shen,

Mingran Wang

et al.

Catalysts, Journal Year: 2024, Volume and Issue: 14(9), P. 626 - 626

Published: Sept. 17, 2024

The oxygen evolution reaction (OER) stands out as a key electrochemical process for the conversion of clean energy. However, practical implementation OER is frequently impeded by its slow kinetics and necessity scarce expensive noble metal catalysts. High-entropy transition sulfides (HETMS) stand at forefront catalysts, renowned their exceptional catalytic performance diversity. Herein, we have synthesized HETMS catalyst, (FeCoNiCuMn50)S2, encapsulated within carbon nanofibers through one-step involving synergistic application electrospinning chemical vapor deposition. By precisely controlling doping levels sulfur, demonstrated that sulfur incorporation significantly increases exposed surface area alloy particles on optimizes electronic configuration elements. These findings reveal instrumental in substantial improvement catalyst’s performance. Notably, catalyst showed optimal activity sulfur-to-metal atom ratio 2:1, delivering an overpotential 254 mV current density 10 mA cm−2 1.0 M KOH solution. Furthermore, (FeCoNiCuMn50)S2 exhibited remarkable stability, underscoring potential efficient robust electrocatalyst sustainable energy applications.

Language: Английский

Citations

0
Corrosion-Engineered Room-Temperature Deposition of NiMoO4/NiS/Ni(OH)2 at Nickel Foam: An Efficient Strategy and Electrocatalyst for the Oxygen Evolution Reaction DOI Creative Commons

Marilia Barreto Dalla Benetta,

Eithne Dempsey, Carmel B. Breslin

et al.

ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 30, 2024

The oxygen evolution reaction (OER) tends to limit the rate of electrolysis water. Accordingly, there is much interest in development electrocatalysts for this important half-reaction. Herein, a NiMoO4/NiS/Ni(OH)2 composite was nucleated directly at nickel foam electrode room temperature and used as an effective electrocatalyst OER. formed aqueous solution thiomolybdate (2.5 mM) dissolved 0.1 M acetate pH 7.5. Its formation facilitated through hydrolysis corrosion foam. Highly adherent deposits were surface throughout porous network give electrochemical active area that approximately 11-fold higher than pristine OER activity NF/NiMoO4/NiS/Ni(OH)2 studied alkaline 1.0 KOH solution. An onset potential 1.47 V vs RHE Tafel slope 110 mV dec–1 observed. required deliver current density 50 mA cm–2 1.56 RHE. Finally, exhibited very good stability over 16 h period.

Language: Английский

Citations

0