Metallenes as functional materials in electrocatalysis

Chemical Society Reviews, Год журнала: 2021, Номер 50(12), С. 6700 - 6719

Опубликована: Янв. 1, 2021

2D metals, metallenes, feature exciting opportunities at the forefront of electrocatalysis. We bring to attention metallene preparation techniques and modification strategies for derivation highly functional metallenes in key electrocatalytic applications.

Язык: Английский

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Electrochemical Water Splitting: Bridging the Gaps Between Fundamental Research and Industrial Applications

Energy & environment materials, Год журнала: 2022, Номер 6(5)

Опубликована: Май 28, 2022

Electrochemical water splitting represents one of the most promising technologies to produce green hydrogen, which can help realize goal achieving carbon neutrality. While substantial efforts on a laboratory scale have been made for understanding fundamental catalysis and developing high‐performance electrocatalysts two half‐reactions involved in electrocatalysis, much less attention has paid doing relevant research larger scale. For example, few such researches done an industrial Herein, we review very recent endeavors bridge gaps between applications electrolysis. We begin by introducing fundamentals electrochemical then present comparisons testing protocol, figure merit, catalyst interest, manufacturing cost industry‐based water‐electrolysis research. Special is tracking surface reconstruction process identifying real catalytic species under different conditions, highlight significant distinctions corresponding mechanisms. Advances designs industry‐relevant electrolysis are also summarized, reveal progress moving practical forward accelerating synergies material science engineering. Perspectives challenges electrocatalyst design strategies proposed finally further lab‐scale large‐scale electrocatalysis applications.

Язык: Английский

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Electronic Modulation of Non‐van der Waals 2D Electrocatalysts for Efficient Energy Conversion

Advanced Materials, Год журнала: 2021, Номер 33(26)

Опубликована: Май 25, 2021

Abstract The exploration of efficient electrocatalysts for energy conversion is important green development. Owing to their high surface areas and unusual electronic structure, 2D have attracted increasing interest. Among them, non‐van der Waals (non‐vdW) materials with numerous chemical bonds in all three dimensions novel properties beyond those vdW been studied increasingly over the past decades. Herein, progress non‐vdW critically reviewed, a special emphasis on structure modulation. Strategies heteroatom doping, vacancy engineering, pore creation, alloying, heterostructure engineering are analyzed tuning structures achieving intrinsically enhanced electrocatalytic performances. Lastly, roadmap future development provided from material, mechanism, performance viewpoints.

Язык: Английский

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Rational Design of Electrode Materials for Advanced Supercapacitors: From Lab Research to Commercialization

Advanced Functional Materials, Год журнала: 2023, Номер 33(14)

Опубликована: Янв. 18, 2023

Abstract Supercapacitors can harvest electrical energy from intermittent sources and transfer it quickly, but their specific must be raised if they are applied to efficiently power wearable flexible electronics, as well larger equipment. However, the remaining big gap between lab research practical applications seriously hinders further progress of advanced supercapacitors, especially for electrode materials. Consequently, a commercial/usable perspective, clear guideline commercialization is highly desired bringing supercapacitors basic into reality. This review focuses on key factors summarizes recent in field outlines perspectives future research. First, several storage mechanisms illustrated building better supercapacitors. Then, up‐to‐date achievements progresses smart methods toward high‐energy effective strategies commercial‐level mass‐loading high packing density electrodes summarized commented upon. Also, integrated systems application fields commercial also highlighted. Subsequently, directions presented here guide

Язык: Английский

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Efficient Alkaline Water/Seawater Hydrogen Evolution by a Nanorod‐Nanoparticle‐Structured Ni‐MoN Catalyst with Fast Water‐Dissociation Kinetics

Advanced Materials, Год журнала: 2022, Номер 34(21)

Опубликована: Апрель 1, 2022

Achieving efficient and durable nonprecious hydrogen evolution reaction (HER) catalysts for scaling up alkaline water/seawater electrolysis is desirable but remains a significant challenge. Here, heterogeneous Ni-MoN catalyst consisting of Ni MoN nanoparticles on amorphous nanorods that can sustain large-current-density HER with outstanding performance demonstrated. The hierarchical nanorod-nanoparticle structure, along large surface area multidimensional boundaries/defects endows the abundant active sites. hydrophilic helps to achieve accelerated gas-release capabilities effective in preventing degradation during water electrolysis. Theoretical calculations further prove combination effectively modulates electron redistribution at their interface promotes sluggish water-dissociation kinetics Mo Consequently, this requires low overpotentials 61 136 mV drive current densities 100 1000 mA cm-2 , respectively, 1 m KOH stable operation 200 h constant density or 500 . This good also works well seawater electrolyte shows toward overall ultralow cell voltages.

Язык: Английский

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Bifunctional Electrocatalysts for Overall and Hybrid Water Splitting

Chemical Reviews, Год журнала: 2024, Номер 124(7), С. 3694 - 3812

Опубликована: Март 22, 2024

Electrocatalytic water splitting driven by renewable electricity has been recognized as a promising approach for green hydrogen production. Different from conventional strategies in developing electrocatalysts the two half-reactions of (e.g., and oxygen evolution reactions, HER OER) separately, there growing interest designing bifunctional electrocatalysts, which are able to catalyze both OER. In addition, considering high overpotentials required OER while limited value produced oxygen, is another rapidly exploring alternative oxidation reactions replace hybrid toward energy-efficient generation. This Review begins with an introduction on fundamental aspects splitting, followed thorough discussion various physicochemical characterization techniques that frequently employed probing active sites, emphasis reconstruction during redox electrolysis. The design, synthesis, performance diverse based noble metals, nonprecious metal-free nanocarbons, overall acidic alkaline electrolytes, thoroughly summarized compared. Next, their application also presented, wherein anodic include sacrificing agents oxidation, pollutants oxidative degradation, organics upgrading. Finally, concise statement current challenges future opportunities presented hope guiding endeavors quest sustainable

Язык: Английский

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Highly Efficient Oxygen Reduction Reaction Activity of N‐Doped Carbon–Cobalt Boride Heterointerfaces

Advanced Energy Materials, Год журнала: 2021, Номер 11(17)

Опубликована: Март 14, 2021

Abstract Compositional and structural engineering of metal‐metalloid materials can boost their electrocatalytic performance. Herein, a highly efficient stable system for the oxygen reduction reaction is obtained by creating heterointerfaces between N‐doped carbon cobalt boride nanosheets. Furthermore, detailed investigation on effect annealing temperature as well amount nitrogen sources conducted to tune The best electrocatalyst among prepared found have an onset potential 1.05 V half‐wave 0.94 V, which are 40 72 mV positive in comparison commercial Pt/C, respectively. Finally, zinc–air battery also assembled using catalyst.

Язык: Английский

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First-row transition metal-based materials derived from bimetallic metal–organic frameworks as highly efficient electrocatalysts for electrochemical water splitting

Energy & Environmental Science, Год журнала: 2022, Номер 15(8), С. 3119 - 3151

Опубликована: Янв. 1, 2022

Electrochemical water splitting is a mature technology for hydrogen generation.

Язык: Английский

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Interstitial boron-triggered electron-deficient Os aerogels for enhanced pH-universal hydrogen evolution

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Март 3, 2022

Abstract Developing high-performance electrocatalysts for hydrogen evolution reaction (HER) is crucial sustainable production, yet still challenging. Here, we report boron-modulated osmium (B-Os) aerogels with rich defects and ultra-fine diameter as a pH-universal HER electrocatalyst. The catalyst shows the small overpotentials of 12, 19, 33 mV at current density 10 mA cm −2 in acidic, alkaline, neutral electrolytes, respectively, well excellent stability, surpassing commercial Pt/C. Operando X-ray absorption spectroscopy that interventional interstitial B atoms can optimize electron structure B-Os stabilize Os active sites an electron-deficient state under realistic working conditions, simultaneously reveals catalytic mechanisms electrolytes. functional theory calculations also indicate introducing tailor electronic Os, resulting reduced water dissociation energy improved adsorption/desorption behavior hydrogen, which synergistically accelerate HER.

Язык: Английский

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Constructing a Hetero-interface Composed of Oxygen Vacancy-Enriched Co₃O₄ and Crystalline–Amorphous NiFe-LDH for Oxygen Evolution Reaction

ACS Catalysis, Год журнала: 2021, Номер 11(23), С. 14338 - 14351

Опубликована: Ноя. 12, 2021

The development of high-performance electrocatalysts is a highly efficient strategy to optimize the sluggish kinetic property oxygen evolution reaction (OER). Herein, we synthesize kind nickel foam (NF)-supported electrocatalyst composed one-dimensional Co3O4 nanowire as core and two-dimensional NiFe-LDH nanosheet shell (denoted NiFe-60/Co3O4@NF). Fluorine introduced into precursor Co(OH)F Co3O4, which results in improved thermal stability significantly increased regularly distributed vacancies, while electrochemically deposited nanosheets possess crystalline/amorphous hybrid structure. As result, hetero-interface mainly constituting Ni species from contributes interaction between Co Fe facilitates electron transfer. Simultaneously, vacancies coordinatively unsaturated amorphous area also determined, finally completing backtracking. Benefiting these factors, only low overpotentials 221 257 mV are required deliver current densities 100 500 mA cm–2, respectively, with quite small Tafel slope 34.6 dec–1 during OER for well-designed NiFe-60/Co3O4@NF electrocatalyst.

Язык: Английский

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