Self-supported NiFe-LDH@CoSx nanosheet arrays grown on nickel foam as efficient bifunctional electrocatalysts for overall water splitting

Yang, Yan; Xie, Yuchen; Yu, Zheng; Guo, Shaoshi; Yuan, Mengwei; Yao, Huiqin; Liang, Zu‐Pei; Lü, Ying; Chan, Ting‐Shan; Li, Cheng; Dong, Hongliang; Ma, Shulan

doi:10.1016/j.cej.2021.129512

Cited by 117 publications

(41 citation statements)

References 79 publications

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“…FMZP4 exhibits superior catalytic activity, obtaining η 20 and η 50 at low cell voltages of 1.72 and 1.79 V, which is comparable with cells based on the Pt/C||IrO 2 electrode as shown in Fig. 6b, as well as the majority of the published electrocatalysts 32–50 (Fig. 6d and Table S6, ESI†).…”

Section: Resultssupporting

confidence: 62%

In situ phosphating of Zn-doped bimetallic skeletons as a versatile electrocatalyst for water splitting

Huang

Yao

Wang

et al. 2022

Energy Environ. Sci.

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Section: Resultssupporting

confidence: 62%

In situ phosphating of Zn-doped bimetallic skeletons as a versatile electrocatalyst for water splitting

Huang

Yao

Wang

et al. 2022

Energy Environ. Sci.

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“…Ni‐ and Fe‐based hydroxides are practically used as electrocatalysts in water electrolyzers 8‐14,54 . Recently, Ni‐Fe or Co‐Fe LDHs proved to be promising OER catalysts, surpassing other active OER catalysts, such as chalcogenides and perovskite oxides 2,15‐30 . Therefore, the catalytic mechanism in Ni–Fe‐LDH or Co–Fe‐LDH has been investigated by studying the structure‐property relationships under in situ alkaline OER conditions 31 …”

Section: Introductionmentioning

confidence: 99%

Computational atomic‐scale design and experimental verification for layered double hydroxide as an efficient alkaline oxygen evolution reaction catalyst

Jung

Kim

Mhin

et al. 2022

Intl J of Energy Research

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Electrochemical water splitting is one of the most efficient techniques to produce hydrogen in an environmentally friendly way. However, a sluggish anodic reaction, namely oxygen evolution reaction (OER), requires the use of an efficient electrocatalyst for achieving economic hydrogen production. Transitionmetal-based layered double hydroxides (LDHs) are promising electrocatalysts for reducing the overpotential of OER in alkaline electrolyte, which is essential for efficient water electrolysis. Nickel-iron-based LDHs (Ni-Fe LDH) have been regarded as the best OER electrocatalysts under alkaline conditions. Hence, a number of research studies have been conducted on further improving the electrocatalytic performance of Ni-Fe LDH. Although the chemical blending of other transition metals with Ni-Fe-LDH is a simple and reliable strategy to enhance the OER activity of Ni-Fe-LDH, a systematic investigation on designing Ni-Fe-LDH with different additional elements is still lacking. In addition, the design of multi-metallic LDH compound via only experimental method is very costly and time-consuming process. In this study, atomic-scale computational and experimental studies are performed to design OER electrocatalysts including unary, binary, and ternary LDH compounds consisting of Ni, Fe, Al, and Co. Density functional theory calculations predict that Ni-Fe-Co ternary LDH can lead to the lowest overpotential for alkaline OER among various computationally modeled LDH systems. Further, experimental verifications successfully demonstrate the computational prediction wherein Ni-Fe-Co-LDH

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“…Developing eco-friendly and sustainable energy technologies is urgent due to the need to address global environmental issues and energy depletion; nevertheless, it remains a challenge [ 1 ]. Hydrogen energy is considered to be a promising alternative to conventional fossil fuels [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

The Scalable Solid-State Synthesis of a Ni5P4/Ni2P–FeNi Alloy Encapsulated into a Hierarchical Porous Carbon Framework for Efficient Oxygen Evolution Reactions

Tian

Jian

et al. 2022

Nanomaterials

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The exploration of high-performance and low-cost electrocatalysts towards the oxygen evolution reaction (OER) is essential for large-scale water/seawater splitting. Herein, we develop a strategy involving the in situ generation of a template and pore-former to encapsulate a Ni5P4/Ni2P heterojunction and dispersive FeNi alloy hybrid particles into a three-dimensional hierarchical porous graphitic carbon framework (labeled as Ni5P4/Ni2P–FeNi@C) via a room-temperature solid-state grinding and sodium-carbonate-assisted pyrolysis method. The synergistic effect of the components and the architecture provides a large surface area with a sufficient number of active sites and a hierarchical porous pathway for efficient electron transfer and mass diffusion. Furthermore, a graphitic carbon coating layer restrains the corrosion of alloy particles to boost the long-term durability of the catalyst. Consequently, the Ni5P4/Ni2P–FeNi@C catalyst exhibits extraordinary OER activity with a low overpotential of 242 mV (10 mA cm−2), outperforming the commercial RuO2 catalyst in 1 M KOH. Meanwhile, a scale-up of the Ni5P4/Ni2P–FeNi@C catalyst created by a ball-milling method displays a similar level of activity to the above grinding method. In 1 M KOH + seawater electrolyte, Ni5P4/Ni2P–FeNi@C also displays excellent stability; it can continuously operate for 160 h with a negligible potential increase of 2 mV. This work may provide a new avenue for facile mass production of an efficient electrocatalyst for water/seawater splitting and diverse other applications.

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Self-supported NiFe-LDH@CoSx nanosheet arrays grown on nickel foam as efficient bifunctional electrocatalysts for overall water splitting

Cited by 117 publications

References 79 publications

In situ phosphating of Zn-doped bimetallic skeletons as a versatile electrocatalyst for water splitting

In situ phosphating of Zn-doped bimetallic skeletons as a versatile electrocatalyst for water splitting

Computational atomic‐scale design and experimental verification for layered double hydroxide as an efficient alkaline oxygen evolution reaction catalyst

The Scalable Solid-State Synthesis of a Ni5P4/Ni2P–FeNi Alloy Encapsulated into a Hierarchical Porous Carbon Framework for Efficient Oxygen Evolution Reactions

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