Enhancing Oxygen Evolution Reaction at High Current Densities on Amorphous‐Like Ni–Fe–S Ultrathin Nanosheets via Oxygen Incorporation and Electrochemical Tuning

Zhang, Jingfang; Hu, Yuchen; Liu, Dali; Yu, Yu; Zhang, Bin

doi:10.1002/advs.201600343

Cited by 123 publications

(84 citation statements)

References 64 publications

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“…Metal borides exhibit special features, such as different shapes ranging from spherical to nanosheets, amorphous in nature,a nd the variation of the metal-to-boron ratio may affect the electrochemical properties. [10] Though it is still ac hallenge to incorporate cations into catalytically OER-active amorphous materials, [11] the very amorphous nature of metal borideso ffers ag reat advantage for the incorporation of cations,t hereby forming am ulti-metal metalloid nanostructure in ao ne-step process and modulating the surfacee lectronic structure, which results in tuning of the electrocatalytic properties. However, metal borides exhibit severe agglomeration, andt his is an issue to be addressed.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Amorphous Iron–Nickel Boride Nanosheets for Highly Efficient Electrocatalytic Oxygen Production

Nsanzimana

Reddu

Peng

et al. 2018

Chemistry A European J

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A cost-effective and efficient electrocatalyst for the oxygen evolution reaction during the electrolysis of water is highly desired. In an effort to develop an economical material for replacing precious-metal-based catalysts, a novel and self-standing amorphous ultrathin nanosheet (NS) of bimetallic iron-nickel boride (Fe-Ni-B NSs) on Ni foam is presented, which displays a better oxygen-evolving activity compared to the precious-metal catalyst RuO . In 1.0 m KOH electrolyte solution, it requires an overpotential of only 237 mV to reach a current density of 10 mA cm with a small Tafel slope of 38 mV dec and shows prominent long-term electrochemical stability. A synergistic effect between highly abundant catalytically active sites on the 3D porous substrate improved the electron transport arising from the presence of highly negative boron, and the high conductivity of the substrate results in an outstanding electrocatalytic activity. The advanced catalytic activity, facile electrode fabrication, and low costs make it a potential oxygen-evolving material, which may be extended to other energy-conversion and storage technologies.

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Section: Introductionmentioning

confidence: 99%

Ultrathin Amorphous Iron–Nickel Boride Nanosheets for Highly Efficient Electrocatalytic Oxygen Production

Nsanzimana

Reddu

Peng

et al. 2018

Chemistry A European J

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“…[3] Alkalinew ater electrolysis is ac ommercial technique for large-scale production of pure hydrogen. [5][6][7] Efficient catalysts must be implemented to overcomet he large water-oxidation overpotential, making the whole water-splitting process less energy-intensive. [5][6][7] Efficient catalysts must be implemented to overcomet he large water-oxidation overpotential, making the whole water-splitting process less energy-intensive.…”

mentioning

confidence: 99%

Facilitating Active Species Generation by Amorphous NiFe‐B_i Layer Formation on NiFe‐LDH Nanoarray for Efficient Electrocatalytic Oxygen Evolution at Alkaline pH

Zhang

et al. 2017

Chemistry A European J

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Searching for a simple and fast strategy to effectively enhance the oxygen evolution reaction (OER) performance of non-noble-metal electrocatalysts in alkaline media remains a significant challenge. Herein, the OER activity of NiFe-LDH nanoarray on carbon cloth (NiFe-LDH/CC) in alkaline media is shown to be greatly boosted by an amorphous NiFe-Borate (NiFe-B ) layer formation on NiFe-layered double hydroxide (NiFe-LDH) surface. Such a NiFe-LDH@NiFe-B /CC catalyst electrode only needs an overpotential of 294 mV to drive 50 mA cm in 1.0 m KOH; 116 mV less than that needed by NiFe-LDH/CC. Notably, this electrode also demonstrates strong long-term electrochemical durability. The superior activity is ascribed to the pre-formed amorphous NiFe-B layer effectively promoting active species generation on the NiFe-LDH surface. This work opens up exciting new avenues for developing high-performance water-oxidation catalyst materials for application.

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Section: Mixed Metal-basedporousmaterials For Oermentioning

confidence: 99%

Porous Materials as Highly Efficient Electrocatalysts for the Oxygen Evolution Reaction

Zhang

Cao

2018

ChemCatChem

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Carbon‐neutral hydrogen has potential to alleviate the energy crisis and ease environmental problems. Water electrolysis is a sustainable way for large‐scale hydrogen production when electricity is generated from renewable energy resources. The key challenge in water splitting is the sluggish kinetics of the oxygen evolution reaction (OER). Thus, it is important and necessary to develop highly efficient electrocatalysts in a cost‐effective way for OER. Porous materials have proven to be versatile in catalysis due to their large surface area, the fast mass diffusion, and the buffer ability of volume change. Herein, we summarize the recent progress of representative methodologies for the synthesis of porous materials toward electrocatalytic OER. The materials discussed in this Review include the cheap transition‐metal‐based (Co, Ni, and Fe) and metal‐free porous materials. This Review sheds light on the different strategies to construct catalysts with porous structures to facilitate OER.

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Enhancing Oxygen Evolution Reaction at High Current Densities on Amorphous‐Like Ni–Fe–S Ultrathin Nanosheets via Oxygen Incorporation and Electrochemical Tuning

Cited by 123 publications

References 64 publications

Ultrathin Amorphous Iron–Nickel Boride Nanosheets for Highly Efficient Electrocatalytic Oxygen Production

Ultrathin Amorphous Iron–Nickel Boride Nanosheets for Highly Efficient Electrocatalytic Oxygen Production

Facilitating Active Species Generation by Amorphous NiFe‐B_i Layer Formation on NiFe‐LDH Nanoarray for Efficient Electrocatalytic Oxygen Evolution at Alkaline pH

Porous Materials as Highly Efficient Electrocatalysts for the Oxygen Evolution Reaction

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Enhancing Oxygen Evolution Reaction at High Current Densities on Amorphous‐Like Ni–Fe–S Ultrathin Nanosheets via Oxygen Incorporation and Electrochemical Tuning

Cited by 123 publications

References 64 publications

Ultrathin Amorphous Iron–Nickel Boride Nanosheets for Highly Efficient Electrocatalytic Oxygen Production

Ultrathin Amorphous Iron–Nickel Boride Nanosheets for Highly Efficient Electrocatalytic Oxygen Production

Facilitating Active Species Generation by Amorphous NiFe‐Bi Layer Formation on NiFe‐LDH Nanoarray for Efficient Electrocatalytic Oxygen Evolution at Alkaline pH

Porous Materials as Highly Efficient Electrocatalysts for the Oxygen Evolution Reaction

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Resources

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Facilitating Active Species Generation by Amorphous NiFe‐B_i Layer Formation on NiFe‐LDH Nanoarray for Efficient Electrocatalytic Oxygen Evolution at Alkaline pH