Cu2S@NiFe layered double hydroxides nanosheets hollow nanorod arrays self-supported oxygen evolution reaction electrode for efficient anion exchange membrane water electrolyzer

Guo, Dandan; Yu, Hongmei; Chi, Jun; Zhao, Yun; Shao, Zhigang

doi:10.1016/j.ijhydene.2023.01.277

Cited by 10 publications

(2 citation statements)

References 74 publications

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“…Nevertheless, despite extensive efforts to improve the catalytic activity and stability of NiFe-based compounds for OER, their performance is still limited due to several factors. Primarily, in strongly alkaline electrolytes, NiFe-based compounds tend to display inherent instability, particularly under high overpotentials, resulting in erosion [21][22][23]. Additionally, during electrochemical testing, the aggregation of NiFe-based compound nanoparticles reduces the number of accessible active sites [24].…”

Section: Introductionmentioning

confidence: 99%

Sulfur-Doped Nickel–Iron LDH@Cu Core–Shell Nanoarrays on Copper Mesh as High-Performance Electrocatalysts for Oxygen Evolution Reaction

Zhang,

Guo,

Sun

et al. 2023

J. Compos. Sci.

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The oxygen evolution reaction (OER) is a slow step in electrocatalytic water splitting. NiFe layered double hydroxides (LDH) have shown promise as affordable OER electrocatalysts, but their performance is hindered by poor charge transfer and sluggish kinetics. To address this, we doped NiFe LDH with sulfur (S) using an in situ electrodeposition method. By growing S-doped NiFe LDH on Cu nanoarrays, we created core–shell structures that improved both the thermodynamics and kinetics of OER. The resulting S-NiFe LDH@Cu core–shell nanoarrays exhibited enhanced activity in water oxidation, with a low potential of 236 mV (at 50 mA cm−2) and a small Tafel slope of 50.64 mV dec−1. Moreover, our alkaline electrolyzer, based on these materials, demonstrated remarkable activity, with a low voltage of 1.56 V at 100 mA cm−2 and excellent durability. The core–shell nanoarray structures provided a larger electroactive surface area, facilitated fast electron transport, and allowed for effective gas release. These findings highlight the potential of S-NiFe LDH@Cu core–shell nanoarrays as efficient OER electrocatalysts.

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Section: Introductionmentioning

confidence: 99%

Sulfur-Doped Nickel–Iron LDH@Cu Core–Shell Nanoarrays on Copper Mesh as High-Performance Electrocatalysts for Oxygen Evolution Reaction

Zhang,

Guo,

Sun

et al. 2023

J. Compos. Sci.

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“…Among explored transition metal-based electrocatalysts, NiFe-layered double hydroxides (LDHs) with 2D nanosheet structures have recently attracted extensive attention. 24–27 Different strategies have been proposed to improve the catalytic performance of NiFe-LDH, including the addition of cations, 28 anion exchange, 29 hybridizations with conductive supports, 30 and vacancy creation, 31 etc. The construction of a 3D hierarchical structure is a promising strategy for exposing more active sites and facilitating the diffusion between the electrolyte and gas, thus resulting in promoted catalytic activity.…”

mentioning

confidence: 99%

Hierarchical CoS₂@NiFe-LDH as an efficient electrocatalyst for alkaline seawater oxidation

Zhang,

Li,

Cai

et al. 2023

Chem. Commun.

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Advanced membrane‐based electrode engineering toward efficient and durable water electrolysis and cost‐effective seawater electrolysis in membrane electrolyzers

Tang,

Su,

Shao

2023

Exploration

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Researchers have been seeking for the most technically‐economical water electrolysis technology for entering the next‐stage of industrial amplification for large‐scale green hydrogen production. Various membrane‐based electrolyzers have been developed to improve electric‐efficiency, reduce the use of precious metals, enhance stability, and possibly realize direct seawater electrolysis. While electrode engineering is the key to approaching these goals by bridging the gap between catalysts design and electrolyzers development, nevertheless, as an emerging field, has not yet been systematically analyzed. Herein, this review is organized to comprehensively discuss the recent progresses of electrode engineering that have been made toward advanced membrane‐based electrolyzers. For the commercialized or near‐commercialized membrane electrolyzer technologies, the electrode material design principles are interpreted and the interface engineering that have been put forward to improve catalytic sites utilization and reduce precious metal loading is summarized. Given the pressing issues of electrolyzer cost reduction and efficiency improvement, the electrode structure engineering toward applying precious metal free electrocatalysts is highlighted and sufficient accessible sites within the thick catalyst layers with rational electrode architectures and effective ions/mass transport interfaces are enabled. In addition, this review also discusses the innovative ways as proposed to break the barriers of current membrane electrolyzers, including the adjustments of electrode reaction environment, and the feasible cell‐voltage‐breakdown strategies for durable direct seawater electrolysis. Hopefully, this review may provide insightful information of membrane‐based electrode engineering and inspire the future development of advanced membrane electrolyzer technologies for cost‐effective green hydrogen production.

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Cu2S@NiFe layered double hydroxides nanosheets hollow nanorod arrays self-supported oxygen evolution reaction electrode for efficient anion exchange membrane water electrolyzer

Cited by 10 publications

References 74 publications

Sulfur-Doped Nickel–Iron LDH@Cu Core–Shell Nanoarrays on Copper Mesh as High-Performance Electrocatalysts for Oxygen Evolution Reaction

Sulfur-Doped Nickel–Iron LDH@Cu Core–Shell Nanoarrays on Copper Mesh as High-Performance Electrocatalysts for Oxygen Evolution Reaction

Hierarchical CoS₂@NiFe-LDH as an efficient electrocatalyst for alkaline seawater oxidation

Advanced membrane‐based electrode engineering toward efficient and durable water electrolysis and cost‐effective seawater electrolysis in membrane electrolyzers

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Cu2S@NiFe layered double hydroxides nanosheets hollow nanorod arrays self-supported oxygen evolution reaction electrode for efficient anion exchange membrane water electrolyzer

Cited by 10 publications

References 74 publications

Sulfur-Doped Nickel–Iron LDH@Cu Core–Shell Nanoarrays on Copper Mesh as High-Performance Electrocatalysts for Oxygen Evolution Reaction

Sulfur-Doped Nickel–Iron LDH@Cu Core–Shell Nanoarrays on Copper Mesh as High-Performance Electrocatalysts for Oxygen Evolution Reaction

Hierarchical CoS2@NiFe-LDH as an efficient electrocatalyst for alkaline seawater oxidation

Advanced membrane‐based electrode engineering toward efficient and durable water electrolysis and cost‐effective seawater electrolysis in membrane electrolyzers

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Hierarchical CoS₂@NiFe-LDH as an efficient electrocatalyst for alkaline seawater oxidation