Earth-abundant transition-metal-based bifunctional catalysts for overall electrochemical water splitting: A review

Journal of Alloys and Compounds, Journal Year: 2019, Volume and Issue: 819, P. 153346 - 153346

Published: Dec. 16, 2019

Language: Английский

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A Freestanding 3D Heterostructure Film Stitched by MOF‐Derived Carbon Nanotube Microsphere Superstructure and Reduced Graphene Oxide Sheets: A Superior Multifunctional Electrode for Overall Water Splitting and Zn–Air Batteries

Advanced Materials, Journal Year: 2020, Volume and Issue: 32(48)

Published: Oct. 19, 2020

Abstract Developing a scalable approach to construct efficient and multifunctional electrodes for the hydrogen evolution reaction (HER), oxygen (OER), reduction (ORR) is an urgent need overall water splitting zinc–air batteries. In this work, freestanding 3D heterostructure film synthesized from Ni‐centered metal−organic framework (MOF)/graphene oxide. During pyrolysis process, 1D carbon nanotubes formed MOF link with 2D reduced graphene oxide sheets stitch film. The results of experiments theoretical calculations show that synergistic effect N‐doped shell Ni nanoparticles leads optimized excellent electrocatalytic activity. Low overpotentials 95 260 mV are merely needed HER OER, respectively, reach current density 10 mA cm −2 . addition, high half‐wave potential 0.875 V obtained ORR, which comparable Pt/RuO 2 ranks among top non‐noble‐metal catalysts. use “all‐in‐one” as electrode performance homemade electrolyzer battery, indicating practical applications.

Language: Английский

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Oxygen Evolution/Reduction Reaction Catalysts: From In Situ Monitoring and Reaction Mechanisms to Rational Design

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(9), P. 6257 - 6358

Published: March 21, 2023

The oxygen evolution reaction (OER) and reduction (ORR) are core steps of various energy conversion storage systems. However, their sluggish kinetics, i.e., the demanding multielectron transfer processes, still render OER/ORR catalysts less efficient for practical applications. Moreover, complexity catalyst–electrolyte interface makes a comprehensive understanding intrinsic mechanisms challenging. Fortunately, recent advances in situ/operando characterization techniques have facilitated kinetic monitoring under conditions. Here we provide selected highlights mechanistic studies with main emphasis placed on heterogeneous systems (primarily discussing first-row transition metals which operate basic conditions), followed by brief outlook molecular catalysts. Key sections this review focused determination true active species, identification sites, reactive intermediates. For in-depth insights into above factors, short overview metrics accurate characterizations is provided. A combination obtained time-resolved information reliable activity data will then guide rational design new Strategies such as optimizing restructuring process well overcoming adsorption-energy scaling relations be discussed. Finally, pending current challenges prospects toward development homogeneous presented.

Language: Английский

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Metal‐Nitrogen‐Doped Carbon Materials as Highly Efficient Catalysts: Progress and Rational Design

Advanced Science, Journal Year: 2020, Volume and Issue: 7(15)

Published: June 23, 2020

Abstract As a typical class of single‐atom catalysts (SACs) possessing prominent advantages high reactivity, selectivity, stability, and maximized atomic utilization, emerging metal‐nitrogen‐doped carbon (M‐N‐C) materials, wherein dispersive metal atoms are coordinated to nitrogen doped in nanomaterials, have presented promise replace the conventional or oxides‐based catalysts. In this work, recent progress M‐N‐C‐based materials achieved both theoretical experimental investigations is summarized general principles for novel design from electronic structure modulating provided. Firstly, applications mechanisms on challenges variety sustainable fuel generation bioinspired reactions, including oxygen reduction reaction (ORR), evolution (OER), hydrogen (HER), dioxide (CO 2 RR), (NRR), nanozyme reactions reviewed. Then, strategies toward enhancing catalytic performance by engineering nature ion centers, coordinative environment active support, their synergistic cooperation, proposed. Finally, prospects rational next high‐performance outlined. It expected that work will provide insights into innovation environmental technologies.

Language: Английский

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Designing High‐Valence Metal Sites for Electrochemical Water Splitting

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(16)

Published: Feb. 17, 2021

Abstract Electrochemical water splitting is a critical energy conversion process for producing clean and sustainable hydrogen; this relies on low‐cost, highly active, durable oxygen evolution reaction/hydrogen reaction electrocatalysts. Metal cations (including transition metal noble cations), particularly high‐valence that show high catalytic activity can serve as the main active sites in electrochemical processes, have received special attention developing advanced In review, heterogenous electrocatalyst design strategies based are presented, associated materials designed summarized. discussion, emphasis given to combined with modulation of phase/electronic/defect structure performance improvement. Specifically, importance using situ operando techniques track real metal‐based during highlighted. Remaining challenges future research directions also proposed. It expected comprehensive discussion electrocatalysts containing be instructive further explore other energy‐related reactions.

Language: Английский

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Critical Review, Recent Updates on Zeolitic Imidazolate Framework‐67 (ZIF‐67) and Its Derivatives for Electrochemical Water Splitting

Advanced Materials, Journal Year: 2021, Volume and Issue: 34(11)

Published: Nov. 30, 2021

Design and construction of low-cost electrocatalysts with high catalytic activity long-term stability is a challenging task in the field catalysis. Metal-organic frameworks (MOF) are promising candidates as precursor materials development highly efficient for energy conversion storage applications. This review starts summary basic concepts key evaluation parameters involved electrochemical water-splitting reaction. Then, different synthesis approaches reported cobalt-based Zeolitic imidazolate framework (ZIF-67) its derivatives critically reviewed. Additionally, several strategies employed to enhance electrocatalytic ZIF-67-based discussed detail. The present provides succinct insight into ZIF-67 (oxides, hydroxides, sulfides, selenides, phosphide, nitrides, telluride, heteroatom/metal-doped carbon, noble metal-supported derivatives) oxygen evolution reaction (OER), hydrogen (HER), overall water splitting Finally, this concludes associated challenges perspectives on developing best economic, durable materials.

Language: Английский

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A comprehensive review on the electrochemical parameters and recent material development of electrochemical water splitting electrocatalysts

RSC Advances, Journal Year: 2023, Volume and Issue: 13(6), P. 3843 - 3876

Published: Jan. 1, 2023

Electrochemical splitting of water is an appealing solution for energy storage and conversion to overcome the reliance on depleting fossil fuel reserves prevent severe deterioration global climate. Though there are several cells, hydrogen (H

Language: Английский

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Ultrathinning Nickel Sulfide with Modulated Electron Density for Efficient Water Splitting

Advanced Energy Materials, Journal Year: 2020, Volume and Issue: 10(41)

Published: Sept. 27, 2020

Abstract Developing nonprecious electrocatalysts via a cost‐effective methods to synergistically achieve high active sites exposure and optimized intrinsic activity remains grand challenge. Here low‐cost scaled‐up chemical etching method is developed for transforming nickel foam (NF) into highly electrocatalyst both the hydrogen evolution reaction (HER) oxygen (OER). The synthetic involves Na 2 S‐induced of NF in presence Fe, leading growth ultrathin Fe‐doped Ni 3 S arrays on substrate (Fe x 3‐ @ NF). combined experimental theoretical investigations reveal that incorporated Fe cations significantly modulate morphology surface electron density , thus boost electrochemically area, transfer, optimize hydrogen/water absorption free energy. 0.9 2.1 requires overpotentials only 72 mV at 10 mA cm −2 HER 252 100 OER 1.0 m KOH, respectively, enabling an alkaline electrolyzer low cell voltage 1.51 V drive overall water splitting. More broadly, this approach very versatile can be used synthesize other metal sulfides (e.g., Fe–Cu–S, Fe–Al–S, Fe–Ti–S).

Language: Английский

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Recent Development and Future Perspectives of Amorphous Transition Metal‐Based Electrocatalysts for Oxygen Evolution Reaction

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(24)

Published: May 1, 2022

Abstract Oxygen evolution reaction (OER), as a relevant half for water splitting to address the energy crisis, has captured great deal of attention. However, this technology always been impeded by lack highly efficient and stable electrocatalyst. Amorphous materials, which possess long‐range disorder only short‐range order over few atoms, are often superior their crystalline counterparts in electrocatalysis owing more active sites, broader chemical composition range, structural flexibility. This review first introduces some assessment criteria OER then presents theoretical modeling mechanisms state‐of‐the‐art amorphous transition metal‐based electrocatalysts, involving oxides, hydroxides, sulfides, phosphides, borides, composites, well practical applications OER. Finally, recent development, existing challenges, future perspectives electrocatalysts discussed. paper offers valuable guidance designing applications.

Language: Английский

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Emerging Cocatalysts on g‐C₃N₄ for Photocatalytic Hydrogen Evolution

Small, Journal Year: 2021, Volume and Issue: 17(40)

Published: July 28, 2021

Over the past few decades, graphitic carbon nitride (g-C3 N4 ) has arisen much attention as a promising candidate for photocatalytic hydrogen evolution reaction (HER) owing to its low cost and visible light response ability. However, unsatisfied HER performance originated from strong charge recombination of g-C3 severely inhibits further large-scale application . In this case, utilization cocatalysts is novel frontline in -based systems due positive effects on supressing carrier recombination, reducing overpotential, improving activity. This review summarizes some recent advances about high-performance based toward HER. Specifically, functions, design principle, classification, modification strategies cocatalysts, well their intrinsic mechanism enhanced activity are discussed here. Finally, pivotal challenges future developments field proposed.

Language: Английский

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