Enhancing Electrocatalytic Water Oxidation of NiFe-LDH Nanosheets via Bismuth-Induced Electronic Structure Engineering

Xu, Haitao; Guo, Ting; Lei, Xiaoyun; Guo, Shaobo; Liu, Quan; Lu, Jiufu; Zhang, Tianlei

doi:10.1021/acsami.3c15403

Cited by 9 publications

(1 citation statement)

References 56 publications

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“…Many efforts have been reported to integrate various active components to optimize the catalytic performance of NiFe-LDH electrocatalysts in OER [32][33][34][35]. An effective strategy is to promote electrolyte diffusion and optimize the desorption of gas products by increasing the electrochemically active surface area (ECSA) of the material [36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Stably Improving the Catalytic Activity of Oxygen Evolution Reactions via Two-Dimensional Graphene Oxide-Incorporated NiFe-Layered Double Hydroxides

Chen,

Lu,

Duanmu

et al. 2024

Catalysts

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NiFe-layered double hydroxides (NiFe-LDH) have been reported to possess exceptional oxygen evolution reaction (OER) activity. However, maintaining the stability of high activity over a long time remains a critical challenge that needs to be addressed for their practical application. Here, we report a custom-sized deep recombination of 2D graphene oxide with NiFe-LDH (NiFe-LDH/GO/NF) through a simple electrodeposition method that improves OER activity and achieves excellent stability. The excellent performance of the catalyst mainly comes from the three-phase interface and electron transport channel dredged by the three-dimensional structure constructed by the deep composite, which can not only significantly reduce its charge and electron transfer resistance, improving the material conductivity, but it also effectively increases the specific surface area, inhibits aggregation, and exposes rich active sites. In addition, GO with good conductivity not only supports NiFe-LDH well but also increases the heterogeneous interface, putting the NiFe-LDH/GO composites in close contact with Ni foam and increasing the electrocatalytic stability of the NiFe-LDH/GO/NF. The experimental results show that the overpotential of NiFe-LDH/20,000GO/NF is only 295 mV at a current density of 100 mA cm−2; the Tafel slope is 52 mV dec−1, and the charge transfer resistance (Rct) is only 0.601 Ω in 1 M KOH. This indicates that GO has excellent potential to assist in constructing geometric and electronic structures of NiFe-LDH in long-term applications.

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Section: Introductionmentioning

confidence: 99%

Stably Improving the Catalytic Activity of Oxygen Evolution Reactions via Two-Dimensional Graphene Oxide-Incorporated NiFe-Layered Double Hydroxides

Chen,

Lu,

Duanmu

et al. 2024

Catalysts

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Cerium‐Doped Nickel Sulfide Nanospheres as Efficient Catalysts for Overall Water Splitting

Li,

Guo,

Wang

et al. 2024

ChemSusChem

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The development of non‐precious metal electrocatalysts with excellent activity and durability for electrochemical water splitting has always been a goal. Transition metal sulfides are attractive electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In this article, we designed and constructed efficient catalysts with multiple synergistic interactions and synthesized Ce‐NiS2@NF nanosphere using a solvothermal method. Ce‐NiS2@NF exhibits excellent HER performance, OER performance, and overall water splitting capability in alkaline electrolytes, demonstrating good stability. The addition of Ce influences the activity of the catalysts, attributed to the synergistic interactions creating more active sites and higher intrinsic activity through the introduction of Ce heteroatoms. Additionally, the self‐supported conductive substrate promotes electron transfer, enhancing the intrinsic activity and active site density of the catalyst. This study provides an in‐depth investigation into structural design and performance enhancement, offering ideas for designing efficient catalysts for overall water electrolysis. This work provides an in‐depth study in terms of structural design performance enhancement and provides ideas for designing efficient alkaline bifunctional catalysts. Valuable insights have been provided in elucidating the intrinsic mechanism of the catalytic activity of cerium‐doped nickel sulfide nanospheres, thus providing new guidance in the field of energy conversion technology.

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NH₄Cl‐Assisted Electrosynthesis of P‐Doped Co(OH)₂ Nanosheet on Cu₂S Hollow Nanotube Arrays for Glycerol Electrooxidation

Xu,

Zhang,

Luo

et al. 2024

Small Methods

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The glycerol oxidation reaction (GOR) for producing high‐value‐added organic compounds is of great research interest due to its potential in alleviating the energy crisis. Herein, a facile NH4Cl‐assisted electrodeposition strategy is reported to fabricate 3D nano‐forest array‐like hollow nanostructures. The hierarchical heterojunction by combining phosphorus doping Co(OH)2 nanosheets with Cu2S nanotube arrays (P‐Co(OH)2@Cu2S NTs/CF) is developed to realize the optimization on GOR. The optimized P‐Co(OH)2@Cu2S NTs/CF catalyst exhibits an exceptional activity with a formate Faradaic efficiency (FE) of 97.40% at a potential of 1.30 V (vs RHE). The experimental results indicate that this unique hollow nano‐forest structure, grown on a conductive support, can expose more active sites and facilitate electron transfer, thereby demonstrating excellent GOR performance. This work provides new opportunities for the design of electrocatalysts of high‐activity and low‐cost hollow heterostructure electrocatalysts for glycerol electrooxidation.

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Enhancing Electrocatalytic Water Oxidation of NiFe-LDH Nanosheets via Bismuth-Induced Electronic Structure Engineering

Cited by 9 publications

References 56 publications

Stably Improving the Catalytic Activity of Oxygen Evolution Reactions via Two-Dimensional Graphene Oxide-Incorporated NiFe-Layered Double Hydroxides

Stably Improving the Catalytic Activity of Oxygen Evolution Reactions via Two-Dimensional Graphene Oxide-Incorporated NiFe-Layered Double Hydroxides

Cerium‐Doped Nickel Sulfide Nanospheres as Efficient Catalysts for Overall Water Splitting

NH₄Cl‐Assisted Electrosynthesis of P‐Doped Co(OH)₂ Nanosheet on Cu₂S Hollow Nanotube Arrays for Glycerol Electrooxidation

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Enhancing Electrocatalytic Water Oxidation of NiFe-LDH Nanosheets via Bismuth-Induced Electronic Structure Engineering

Cited by 9 publications

References 56 publications

Stably Improving the Catalytic Activity of Oxygen Evolution Reactions via Two-Dimensional Graphene Oxide-Incorporated NiFe-Layered Double Hydroxides

Stably Improving the Catalytic Activity of Oxygen Evolution Reactions via Two-Dimensional Graphene Oxide-Incorporated NiFe-Layered Double Hydroxides

Cerium‐Doped Nickel Sulfide Nanospheres as Efficient Catalysts for Overall Water Splitting

NH4Cl‐Assisted Electrosynthesis of P‐Doped Co(OH)2 Nanosheet on Cu2S Hollow Nanotube Arrays for Glycerol Electrooxidation

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NH₄Cl‐Assisted Electrosynthesis of P‐Doped Co(OH)₂ Nanosheet on Cu₂S Hollow Nanotube Arrays for Glycerol Electrooxidation