Molybdenum sulfide/Ni:FeOOH heterostructures as efficient water oxidation electrocatalysts in alkaline media

Wang, Aijian; Yang, Xin; Zhai, Xiaoyu; Dou, Yuqin; Syed, Kamal; Zhao, Long; Zhu, Weihua

doi:10.1016/j.electacta.2024.144324

Electrochimica Acta

2024

DOI: 10.1016/j.electacta.2024.144324

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Molybdenum sulfide/Ni:FeOOH heterostructures as efficient water oxidation electrocatalysts in alkaline media

Aijian Wang,

Xin Yang,

Xiaoyu Zhai

et al.

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2024

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Cited by 3 publications

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3D‐Printed Hierarchical Nanostructured N‐Co₂NiO₄ NF Electrode for Efficient Concurrent Electrocatalytic Production of Hydrogen and Formate

Han,

Tao,

Wang

et al. 2024

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Replacing the oxygen evolution reaction with the alternative glycerol electro‐oxidation reaction (GER) provides a promising strategy to enhance the efficiency of hydrogen production via water electrolysis while co‐generating high‐value chemicals. However, obtaining low‐cost and efficient GER electrocatalysts remains a big challenge. Herein, a self‐supported N‐doped Co2NiO4 nanoflakes (N‐Co2NiO4 NF) is proposed for efficient electrocatalytic oxidation of glycerol to formate. The synergistic effect induced by the interaction of the layered Co2NiO4 nanostructures on the 3D‐printed Nickel‐Yttria‐stabilized zirconia (Ni‐YSZ) substrate and the amorphous nitrogen‐doping promotes the anodic GER. The N‐Co2NiO4 NF exhibits low potentials of 1.07 and 1.18 V (vs. RHE) for GER to drive 10 and 50 mA cm−2, respectively. The constituted two‐electrode electrolyzer (N‐Co2NiO4 NF//NiS‐Co‐NiP) displays excellent activity that only requires ultralow cell voltages of 1.24 and 1.55 V to afford 10 and 200 mA cm−2, respectively, with a high FE (97%) for formate production and an excellent durability (120 h). This study provides a versatile approach for manufacturing high‐performance Ni‐based electrocatalyst for GER, paving the way for the energy‐saving and environmentally‐friendly co‐production of value‐added chemicals and hydrogen.

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3D‐Printed Hierarchical Nanostructured N‐Co₂NiO₄ NF Electrode for Efficient Concurrent Electrocatalytic Production of Hydrogen and Formate

Han,

Tao,

Wang

et al. 2024

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Adjusting the Structure–Activity Relationship of MOFs to Obtain Electrocatalysts with Higher Hydrogen Evolution and Urea Oxidation Performance by Introducing Different Linkers

Zhou,

Liu,

et al. 2024

Inorg. Chem.

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Three kinds of metal−organic frameworks possessing analogous structures were prepared by regulating the structure units of organic linkers. MOF/nickel foam electrocatalysts were formed by in situ hydrothermal growth of MOFs on a clean supported substrate nickel foam (NF), and the corresponding composites were prepared. We phosphatated them and obtained the heterojunction catalyst. Different structure units in the ligand have significant influences on the phosphating, resulting in heterogeneous materials that are not quite the same. Among them, heterogeneous materials with Co 2 P and NiP have the best catalytic performance. We also studied the urea oxidation reaction (UOR) properties of the materials and proved that it is feasible to improve the UOR performance of MOF/NF composites by regulating the structure units in the organic linkers. The results provided an idea for the reasonable selection of organic ligands to construct MOFs to regulate the electrocatalytic performance.

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One-Step Synthesis of TiO₂/FeO(OH) Nano-Heterostructures as Electrocatalysts for the Oxygen Evolution Reaction

Liu,

Wang,

Wang

et al. 2024

ACS Appl. Nano Mater.

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Transition metal compounds are abundant on Earth and are cost-effective materials. However, their inherent characteristics of low electrical conductivity and low electrocatalytic activity greatly limit their applications as electrocatalysts. In this study, we successfully synthesized TiO 2 /FeO(OH) nanocomposite materials rich in heterogeneous structures using a one-step hydrothermal method and obtained nanostructured TiO 2 /FeO(OH)-2 with excellent electrocatalytic oxygen evolution reaction (OER) performance by adjusting the ratio of Ti elements. The opposite charge regions at the heterojunction interface led to the reconstruction of the built-in electric field, accelerating electron transfer, optimizing the electronic structure during the catalytic reaction process, and ensuring the stability of surface charged active center sites in the heterojunction. Furthermore, in situ Raman measurements confirmed the crucial role of the built-in electric field in the electrocatalytic OER process of the TiO 2 /FeO(OH)-2 nano-heterostructure. The density functional theory calculations further confirmed the promotional effect of the heterogeneous interfaces constructed in TiO 2 /FeO(OH)-2 on the OER activity and also revealed that the intermediate *OOH is the rate-determining step of the OER reaction. The optimized TiO 2 /FeO(OH)-2 composites with p−n heterojunctions featuring nanorod and nanosphere structures recorded an overpotential of 262 mV at 10 mA cm −2 and exhibited sustained effectiveness over a 100 h period at an overpotential of 300 mV. This study not only provides a simple method for constructing p−n type heterogeneous structure materials but also in situ characterizes the role of heterojunction interfaces in the mechanism of electrocatalytic OER.

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Molybdenum sulfide/Ni:FeOOH heterostructures as efficient water oxidation electrocatalysts in alkaline media

Cited by 3 publications

References 46 publications

3D‐Printed Hierarchical Nanostructured N‐Co₂NiO₄ NF Electrode for Efficient Concurrent Electrocatalytic Production of Hydrogen and Formate

3D‐Printed Hierarchical Nanostructured N‐Co₂NiO₄ NF Electrode for Efficient Concurrent Electrocatalytic Production of Hydrogen and Formate

Adjusting the Structure–Activity Relationship of MOFs to Obtain Electrocatalysts with Higher Hydrogen Evolution and Urea Oxidation Performance by Introducing Different Linkers

One-Step Synthesis of TiO₂/FeO(OH) Nano-Heterostructures as Electrocatalysts for the Oxygen Evolution Reaction

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Molybdenum sulfide/Ni:FeOOH heterostructures as efficient water oxidation electrocatalysts in alkaline media

Cited by 3 publications

References 46 publications

3D‐Printed Hierarchical Nanostructured N‐Co2NiO4 NF Electrode for Efficient Concurrent Electrocatalytic Production of Hydrogen and Formate

3D‐Printed Hierarchical Nanostructured N‐Co2NiO4 NF Electrode for Efficient Concurrent Electrocatalytic Production of Hydrogen and Formate

Adjusting the Structure–Activity Relationship of MOFs to Obtain Electrocatalysts with Higher Hydrogen Evolution and Urea Oxidation Performance by Introducing Different Linkers

One-Step Synthesis of TiO2/FeO(OH) Nano-Heterostructures as Electrocatalysts for the Oxygen Evolution Reaction

Contact Info

Product

Resources

About

3D‐Printed Hierarchical Nanostructured N‐Co₂NiO₄ NF Electrode for Efficient Concurrent Electrocatalytic Production of Hydrogen and Formate

3D‐Printed Hierarchical Nanostructured N‐Co₂NiO₄ NF Electrode for Efficient Concurrent Electrocatalytic Production of Hydrogen and Formate

One-Step Synthesis of TiO₂/FeO(OH) Nano-Heterostructures as Electrocatalysts for the Oxygen Evolution Reaction