Multiphase Fe-doped Ni3S2/MoOx electrocatalyst prepared by facile one-step hydrothermal for full-cell water splitting: Effect of Mo on physical and electrochemical properties

被引：9

作者：

Gultom N.S. ^{[1
]}

Li C.-H. ^{[1
,2
]}

Kuo D.-H. ^{[1
,2
]}

Silitonga M.Z. ^{[1
]}

机构：

[1] Department of Materials Science and Engineering, National Taiwan University of Science and Technology, No.43, Section 4, Keelung Road, Taipei

[2] Graduate Institute of Energy and Sustainability Technology, National Taiwan University of Science and Technology, No.43, Section 4, Keelung Road, Taipei

来源：

Applied Catalysis B: Environmental | 2024年 / 353卷

关键词：

Bifunctional electrocatalyst; Hydrogen production; Multi-phase; Stack cell electrolyzer; Water splitting;

D O I：

10.1016/j.apcatb.2024.124100

中图分类号：

学科分类号：

摘要：

Herein, we develop a multiphase strategy to improve the HER performance by incorporating the MoOx phase with the addition of MoCl5 during the one-step hydrothermal. Adding MoCl5 at 0.5 mmol (MFN-0.5) yields the best HER performance, with an overpotential of 261 mV at a current density of 100 mA/cm2. The MFN-0.5 catalyst exhibits excellent performance for both HER and OER, enabling it to drive full-cell water splitting with cell potentials of 1.50 and 1.71 V at 10 and 100 mA/cm2, respectively. We further scale up the MFN-0.5 (4 ×4 cm2) for a single stack-cell electrolyzer, requiring a cell potential of 1.85 V to achieve a large current density of 250 mA/cm2. Incorporating the MoOx phase accelerates the water dissociation step and protects the metal sulfide surface from oxidation under anodization in an alkaline environment. Our findings offer a promising approach for developing highly efficient catalysts for electrolytic water-splitting applications. © 2024 Elsevier B.V.

引用

共 55 条

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