A Polydopamine-Mediated Crystalline/Amorphous Ru-Ruo2/Ni(Oh)2 Composite Catalyst for High Current Density Hydrogen Evolution Reaction DOI

Liuyun Lai,

Houjun Zhang,

Juan Zeng

et al.

Published: Jan. 1, 2025

Language: Английский

Copper restructured transition metal/metal oxide heterostructure with a hierarchical nanostructure for accelerated water dissociation kinetics and alkaline hydrogen evolution DOI

Lingzhi Xia,

Jianhua Zhang, Kailing Zhou

et al.

Fuel, Journal Year: 2024, Volume and Issue: 378, P. 132937 - 132937

Published: Sept. 1, 2024

Language: Английский

Citations

5
Bi-cation incorporated Ni3N nanosheets boost water dissociation kinetics for enhanced alkaline hydrogen evolution activity DOI

Yuwen Hu,

Fozia Sultana,

Muhammad‐Sadeeq Balogun

et al.

Nanoscale, Journal Year: 2024, Volume and Issue: 16(8), P. 4325 - 4332

Published: Jan. 1, 2024

Nickel nitride (Ni3N) is a promising electrocatalyst for the hydrogen evolution reaction (HER) owing to its excellent metallic features and has been demonstrated exhibit considerable activity water oxidation. However, undesirable characteristics as an HER due poor unfavourable d-band energy level significantly limit dissociation kinetics. Herein, electrocatalytic of Ni3N was prominently enhanced via simultaneous incorporation bi-cations (vanadium (V) iron (Fe), denoted V-Fe-Ni3N). The optimized V-Fe-Ni3N displays impressive performance with overpotential 69 mV at 10 mA cm-2 good stability in 1.0 M KOH, which remarkably better than pristine Ni3N, V-doped Fe-doped considerably closer commercial Pt/C catalyst. Based on density functional theory (DFT) studies, V Fe atoms not only serve active sites promoting kinetics but also tune electronic structure achieve adsorption capabilities. This work presents inclusive understanding rational designing high-performance transition metal nitride-based electrocatalysts production. Its can be by doping cations.

Language: Английский

Citations

4
Investigating the Effects of Copper Impurity Deposition on the Structure and Electrochemical Behavior of Hydrogen Evolution Electrocatalyst Materials DOI Creative Commons

Sonakshi Saini,

Salem C. Wright, Sahanaz Parvin

et al.

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Electrolysis of impure water (such as seawater) has recently garnered research interest it may enable hydrogen production at reduced costs. However, the tendency impurity ions and other species to degrade electrocatalysts membranes within an electrolyzer is a serious challenge. Here, we investigate effects copper impurities varying concentrations on evolution reaction (HER) using platinum electrocatalysts. A decrease current density observed with increasing concentration. By comparing effect ionic different concentrations, gain insight into how can interfere HER potentials. Surface characterization electrodes reveals differences in morphology extent deposition HER-active vs inactive gold electrodes. This enables improved understanding nucleates grows two types under electrochemical conditions while also confirming low-concentration cases, present seawater. The results indicate that electrodeposition competes HER, nature varies depending electrocatalytic activity electrode. study provides toward catalyst design withstand impurity-induced degradation over extended use.

Language: Английский

Citations

0
Optimization of hollow Pt-Ni alloy bifunctional electrocatalysts via ethylene glycol/glycerol ratio in modified polyol process DOI

Dong-Geon Seo,

Deok‐Hye Park,

Seon-Ha Park

et al.

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 632, P. 236322 - 236322

Published: Jan. 30, 2025

Language: Английский

Citations

0
A Polydopamine-Mediated Crystalline/Amorphous Ru-Ruo2/Ni(Oh)2 Composite Catalyst for High Current Density Hydrogen Evolution Reaction DOI

Liuyun Lai,

Houjun Zhang,

Juan Zeng

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0