Rational Design of Multiple Heterostructures with Synergistic Effect for Efficient and Stable Hydrogen Evolution Toward Industrial Alkaline Water Splitting

Advanced Functional Materials, Год журнала: 2024, Номер 34(37)

Опубликована: Апрель 21, 2024

Abstract Electrocatalytic hydrogen evolution reaction (HER) via alkaline water splitting holds great promise for industrial clean production but is frustrated by limited catalytic activity and inferior stability under high current density. Elaborate manipulating of heterostructure on robust electrodes essential challenging accelerating HER kinetics with durability. Herein, a nickel mesh electrode, offering mechanical stability, directly engineered layers multiple heterostructures (r‐Mn–Ni/CoP) facile one‐pot electrodeposition followed surface reconstruction strategy. The abundant composed crystalline CoP, NiP, amorphous region, additional Mn doping considerably manipulate the electronic structure optimized charge transfer; while in situ surface‐reconstructed hydrophilic nanoflakes enable rapid wetting active sites to electrolyte. Consequently, r‐Mn–Ni/CoP requires only 134 mV overpotential at density 100 mA cm −2 , superior monophasic undoped samples, majority reported catalysts. Remarkably, an electrolyzer cathode demonstrates extraordinary voltage 1.734 V 300 stable operation 800 h. finding provides feasible strategy fabrication nonprecious‐metal‐based electrocatalysts toward electrolysis.

Язык: Английский

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Unlocking Efficiency: Minimizing Energy Loss in Electrocatalysts for Water Splitting

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Июнь 25, 2024

Abstract Catalysts play a crucial role in water electrolysis by reducing the energy barriers for hydrogen and oxygen evolution reactions (HER OER). Research aims to enhance intrinsic activities of potential catalysts through material selection, microstructure design, various engineering techniques. However, consumption has often been overlooked due intricate interplay among catalyst microstructure, dimensionality, catalyst–electrolyte–gas dynamics, surface chemistry, electron transport within electrodes, transfer electrode components. Efficient development high‐current‐density applications is essential meet increasing demand green hydrogen. This involves transforming with high into electrodes capable sustaining current densities. review focuses on improvement strategies mass exchange, charge transfer, resistance decrease consumption. It bridge gap between laboratory‐developed, highly efficient industrial regarding structural catalyst‐electrode interplay, outlining roadmap hierarchically structured electrode‐based minimizing loss electrocatalysts splitting.

Язык: Английский

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Boosting oxygen evolution reaction by FeNi hydroxide-organic framework electrocatalyst toward alkaline water electrolyzer

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Авг. 23, 2024

The oxygen evolution reaction plays a vital role in modern energy conversion and storage, developing cost-efficient catalysts with industrially relevant activity durability is highly desired but still challenging. Here, we report an efficient durable FeNi hydroxide organic framework nanosheet array catalyst that competently affords long-term at industrial-grade current densities alkaline electrolyte. desirable high-intensity performance attributed to three aspects as follows. First, two-dimensional porous arrays maximum specific surface facilitate mass/charge transfer accommodate high-current-density catalysis. Second, situ derived motifs offer bimetallic synergistic catalysis centers high intrinsic activity. Third, carboxyl ligands alleviate metal oxidation favorable for charge tolerability against peroxidation dissolution under strong polarization. As result, this requires overpotential of only 280 mV deliver density up 1 A/cm2 long over 1000 h. Moreover, water electrolyzer alternative demonstrates increased economic effectiveness compared commercial levels present. Developing crucial various technologies. Here the authors NiFe

Язык: Английский

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Self‐Limited Formation of Nanoporous Nickel Heterostructure Catalyst for Electrochemical Hydrogen Production

Advanced Functional Materials, Год журнала: 2024, Номер 34(37)

Опубликована: Март 12, 2024

Abstract Nickel has risen as a viable and cost‐effective substitute to noble metal catalysts in electrochemical hydrogen production, yet developing air‐stable highly efficient nanostructured nickel‐based remains significant challenge. Here facile method for creating nanoporous Ni/NiO heterostructure electrocatalytic production is reported. The protocol employs chemical dealloying establish 3D bicontinuous structure, followed by controlled oxidation process situ generate uniform NiO surface layers atop the metallic nickel matrix self‐limiting manner. This approach not only yields active through simple procedure but also effectively mitigates auto‐ignition issue inherent nanosized Ni, thereby enhancing air stability. By leveraging synergistic interaction between Ni‐NiO co‐catalysis improved access intensified sites, electrocatalysts exhibit superior performance evolution reaction, markedly outperforming Pt/C catalysts, high stability alkaline environments. exploration of transition metals opens new avenues advanced metal/oxide diverse energy applications.

Язык: Английский

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Electrocatalysts with Highly Dispersed Cerium in Nickel Matrix for Hydrogen Evolution in Alkaline Electrolyte

Advanced Energy Materials, Год журнала: 2024, Номер 14(25)

Опубликована: Май 20, 2024

Abstract It is challenging to develop highly active and durable electrocatalysts for hydrogen evolution reaction (HER) in alkaline water electrolysis. Herein, an electrocatalyst synthesized with dispersed cerium a nickel matrix, showing overpotential of 169 mV HER at current density 500 mA cm −2 , about 137 lower than that observed without cerium. Kinetic analysis results suggest doping facilitates the intermediate H HER, thus accelerating process dissociation. Density functional theory (DFT) calculations also indicate introduction can energy barrier kinetically sluggish Volmer step by altering orbital occupation near Fermi level, promoting Furthermore, electrolyzer constructed exhibits cell voltage as low 1.67 V 800 2000 h 7 м KOH 80 °C. The robust property makes it excellent candidate practical applications.

Язык: Английский

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Boosting oxygen evolution reaction activity and durability of FeOOH-MOF composite at industrial-grade current densities by a facile corrosion strategy

Applied Catalysis B Environment and Energy, Год журнала: 2025, Номер 371, С. 125221 - 125221

Опубликована: Март 3, 2025

Язык: Английский

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Insights into the pH effect on hydrogen electrocatalysis

Chemical Society Reviews, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

This review systematically provides various insights into the pH effect on hydrogen electrocatalysis, and thus providing a reference for future development of electrocatalysis based these insights.

Язык: Английский

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Ru-Ni alloy nanosheets as tandem catalysts for electrochemical reduction of nitrate to ammonia

Nano Research, Год журнала: 2024, Номер 17(6), С. 4815 - 4824

Опубликована: Фев. 1, 2024

Язык: Английский

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Developing Practical Catalysts for High‐Current‐Density Water Electrolysis

Advanced Energy Materials, Год журнала: 2024, Номер 14(45)

Опубликована: Окт. 28, 2024

Abstract High‐current‐density water electrolysis is considered a promising technology for industrial‐scale green hydrogen production, which of significant value to energy decarbonization and numerous sustainable industrial applications. To date, substantial research advancements are achieved in catalyst design laboratory‐based electrolysis. While the designed catalysts demonstrate remarkable performance at low current densities, they suffer from marked deteriorations both activity long‐term stability under industrial‐level high‐current‐density operations. provide timely assessment that helps bridge gap between laboratory‐scale fundamental practical technology, here various commercial electrolyzers first systematically analyzed, then key parameters including work temperature, density, lifetime stacks, cell efficiency, capital cost stacks critically evaluated. In addition, impact high density on electrocatalytic behavior catalysts, intrinsic activity, stability, mass transfer, discussed advance design. Therefore, by covering range critical issues material principles parameters, future directions development highly efficient low‐cost presented procedure screening laboratory‐designed outlined.

Язык: Английский

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Cu Embedded in Co–P Nanosheets with Super Wetting Structure for Accelerated Overall Water Splitting under Simulated Industrial Conditions

Advanced Energy Materials, Год журнала: 2024, Номер 14(35)

Опубликована: Июнь 20, 2024

Abstract The development of advanced electrocatalysts with exceptional performance at high current densities is pivotal for reducing electric energy consumption in industrial water splitting hydrogen production. Herein, a flexible one‐step electrodeposition approach developed to synthesize superhydrophilic 3D flower‐like clusters Cu–Co–P nanosheets grown situ on nickel foam (NF). Introducing Cu into Co–P causes strong electron interactions, forming an electronic configuration favorable the adsorption and desorption intermediates, which significantly improves intrinsic catalytic activity. as‐deposited Cu–Co–P/NF display notable bifunctional activity low overpotentials 259 65 mV oxygen evolution reactions, respectively, 10 mA cm −2 . Superwetting nanostructures are conducive penetration electrolytes rapid release bubbles, enabling efficient utilization active sites timely bubble stress under densities. An assembled Cu–Co–P/NF(+, −) electrolyzer achieves impressive voltage 1.85 V 500 appreciable stability over 220 h simulated conditions. This work offers attractive strategy regulating superaerophobic splitting, can contribute practical applications.

Язык: Английский

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