Details

Autor(en) / Beteiligte

• Chen, Mingshuai
• Wu, Guangping
• Du, Xiaoqiang
• Zhang, Xiaoshuang

Titel

Controlled synthesis of the M doped (M = Fe, Cu, Zn, Mn)-Co4S3/Ni3S2 catalyst with high electrocatalytic performance for hydrogen evolution reaction in seawater and urea

Ist Teil von

• Fuel (Guildford), 2025-02, Vol.381, p.133314, Article 133314

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2025

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Fe-Co4S3/Ni3S2 showed excellent HER catalytic activity in 1 M KOH + seawater and 1 M KOH + 0.5 M urea, reaching a current density of 10 mA cm−2 at a low overpotential of 81 and 66 mV. [Display omitted] •Fe-Co4S3/Ni3S2 electrodes was synthesized for the first time through hydrothermal processes.•This Fe-Co4S3/Ni3S2 nanoarrays exhibits enhanced activity of the HER (overpotential of 66 mV @10 mA cm−2).•DFT show that the Fe-Co4S3 material exhibits the minimum Gibbs free energy. Electrolysis of seawater is a promising method for producing hydrogen, but sluggish reaction kinetics and electrolyte containing corrosive ions limit its development. In this work, a series of M doped (M = Fe, Cu, Zn, Mn)-Co4S3/Ni3S2 catalyst has been prepared on Ni foam by hydrothermal method with excellent seawater and urea splitting performance. The unique 3D porous structure provides a large number of active sites for the catalyst, which has strong catalytic activity. Fe-Co4S3/Ni3S2 electrode showed excellent hydrogen evolution reaction (HER) catalytic activity in 1 M KOH + seawater and 1 M KOH + 0.5 M urea, driving a current density of 10 mA cm−2 at a low overpotential of 81 and 66 mV. In addition, Fe-Co4S3/Ni3S2 electrode also shows strong stability in 15 h stability test. The results show that although the impurity ions in seawater affect the activity of catalyst, the corrosion resistance of catalyst also improves the catalytic activity and stability. Density functional theory calculations show that this Fe-Co4S material exhibits the optimal Gibbs free energy of hydrogen, the introduction of this Ni3S2 material enhances the electrical conductivity of the material, and the synergistic catalysis of the two materials promotes the optimal hydrogen production performance of the Fe-Co4S3/Ni3S2 material. This work provides a novel understanding for the research of catalysts used in the electrolysis of seawater and urea.