Bifunctional Electrocatalysts for Overall and Hybrid Water Splitting

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(7), P. 3694 - 3812

Published: March 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

Language: Английский

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Self-supporting metal–organic framework-based hydrogen and oxygen electrocatalysts

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(25), P. 13089 - 13106

Published: Jan. 1, 2023

This article reviews the recent development of self-supporting metal–organic framework-based hydrogen and oxygen electrocatalysts with a focus on synthesis strategy application, concluding some current challenges future perspectives.

Language: Английский

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Heterogeneous ultra-thin FeCo-LDH@Co(OH)2 nanosheets facilitated electrons transfer for oxygen evolution reaction

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 472, P. 145076 - 145076

Published: July 29, 2023

Language: Английский

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Stabilizing Ni²⁺ in Hollow Nano MOF/Polymetallic Phosphides Composites for Enhanced Electrochemical Performance in 3D‐Printed Micro‐Supercapacitors

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(29)

Published: March 26, 2024

Polymetallic phosphides exhibit favorable conductivities. A reasonable design of nano-metal-organic frame (MOF) composite morphologies and in situ introduction polymetallic into the framework can effectively improve electrolyte penetration rapid electron transfer. To address existing challenges, Ni, with a strong coordination ability N, is introduced to partially replace Co nano-Co-MOF composite. The hollow nanostructure stabilized through CoNi bimetallic low-temperature controllable phosphide generation rate. Co, P atoms, generated during reduction, enhance transfer rate within framework. X-ray absorption fine structure (XAFS) characterization results further confirm existence Ni-N, Ni-Ni, Co-Co structures nanocomposite. changes each component charge-discharge process electrochemical reactions are investigated using diffraction (XRD). Theoretical calculations that conductivity. VZNPGC//MXene MSCs, constructed active materials derived from nano MOF composites synthesized Ni

Language: Английский

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Understanding Advanced Transition Metal‐Based Two Electron Oxygen Reduction Electrocatalysts from the Perspective of Phase Engineering

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(25)

Published: March 8, 2024

Abstract Non‐noble transition metal (TM)‐based compounds have recently become a focal point of extensive research interest as electrocatalysts for the two electron oxygen reduction (2e − ORR) process. To efficiently drive this reaction, these TM‐based must bear unique physiochemical properties, which are strongly dependent on their phase structures. Consequently, adopting engineering strategies toward structure has emerged cutting‐edge scientific pursuit, crucial achieving high activity, selectivity, and stability in electrocatalytic This comprehensive review addresses intricate field applied to non‐noble 2e ORR. First, connotation fundamental concepts related kinetics thermodynamics succinctly elucidated. Subsequently, focus shifts detailed discussion various approaches, including elemental doping, defect creation, heterostructure construction, coordination tuning, crystalline design, polymorphic transformation boost or revive ORR performance (selectivity, stability) catalysts, accompanied by an insightful exploration phase‐performance correlation. Finally, proposes fresh perspectives current challenges opportunities burgeoning field, together with several critical directions future development electrocatalysts.

Language: Английский

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Recent Developments of Carbon Dots for Advanced Zinc‐Based Batteries: A Review

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(29)

Published: Feb. 20, 2024

Abstract Rechargeable Zn‐based batteries provide a compelling supplement to subsistent energy storage devices owing their high density, good safety, and low cost. Nevertheless, inherent imperfections such as dendrite growth, side reactions, andante reaction kinetics, severely impede commercialization. As new 0D nanomaterials, carbon dots (CDs) with unique characteristics excellent electrochemical activity, exhibit promising potential exploitation in electrochemistry electrocatalysis areas. Herein, the adhibition of CDs resolving aforementioned drawbacks is introduced. To begin with, concepts, physicochemical properties, synthetic methods are discussed. Next, recent developments advances exploiting respectively ameliorating performance Zn anode, cathode, electrolytes ion bifunctional electrocatalytic activities including oxygen reduction evolution for Zn‐air batteries, roundly reviewed minutely generalized. Finally, current challenges prospects surveyed well, aiming offer reference blossom advanced batteries.

Language: Английский

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Self-reconstructed ZIF-L/Co(OH)2 heterointerface modulates electronic structure of Ru and boosts electrocatalytic hydrogen evolution

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 490, P. 151926 - 151926

Published: May 5, 2024

Language: Английский

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Immobilization of Oxyanions on the Reconstructed Heterostructure Evolved from a Bimetallic Oxysulfide for the Promotion of Oxygen Evolution Reaction

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: July 29, 2023

Efficient and durable oxygen evolution reaction (OER) requires the electrocatalyst to bear abundant active sites, optimized electronic structure as well robust component mechanical stability. Herein, a bimetallic lanthanum-nickel oxysulfide with rich vacancies based on La2O2S prototype is fabricated binder-free precatalyst for alkaline OER. The combination of advanced in situ ex characterizations theoretical calculation uncovers synergistic effect among La, Ni, O, S species during OER, which assures adsorption stabilization oxyanion [Formula: see text] onto surface deeply reconstructed porous heterostructure composed confining NiOOH nanodomains by La(OH)3 barrier. Such coupling, confinement, porosity immobilization enable notable improvement site accessibility, phase stability, mass diffusion capability intrinsic Gibbs free energy oxygen-containing intermediates. delivers exceptional OER activity durability, outperforming most Ni-based benchmark electrocatalysts.

Language: Английский

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Metal–organic framework and carbon hybrid nanostructures: Fabrication strategies and electrocatalytic application for the water splitting and oxygen reduction reaction

Deleted Journal, Journal Year: 2023, Volume and Issue: 2, P. e9120078 - e9120078

Published: May 24, 2023

With the rapid development of economy, increasing energy crisis and environmental pollution urge us to develop sustainable clean novel systems. Among them, electrochemical conversion technology is considered as one ideal potential alternative systems, electrocatalysts play critical roles but are still challenging. Metal-organic frameworks (MOFs), thanks their regular channels, atomically dispersed active centers, adjustable chemical pore environments, have severed promising for conversion. However, relatively low conductivities instabilities MOFs limit wide application in this field. In case, fabricating hybrids carbon-based materials an effective way overcome above deficiencies. addition, synergistic effects between carbons could optimize electronic structures sites promote surface areas, thus improve electrocatalytic performances composites. Herein, we outline current MOF/carbon composites, including fabrication methods hybridized with various dimensions electrocatalysis utilization water splitting, hydrogen evolution reaction (HER), oxygen (OER), reduction (ORR). Finally, advantages challenges such catalysts highlighted future endeavors on composites HER, OER ORR discussed.

Language: Английский

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The Emerging Star of Carbon Luminescent Materials: Exploring the Mysteries of the Nanolight of Carbon Dots for Optoelectronic Applications

Small, Journal Year: 2024, Volume and Issue: 20(31)

Published: March 10, 2024

Carbon dots (CDs), a class of carbon-based nanomaterials with dimensions less than 10 nm, have attracted significant interest since their discovery. They possess numerous excellent properties, such as tunability photoluminescence, environmental friendliness, low cost, and multifunctional applications. Recently, large number reviews emerged that provide overviews synthesis, applications, composite functionalization. The application CDs in the field optoelectronics has also seen unprecedented development due to optical but them this are relatively rare. With idea deepening broadening understanding applications optoelectronics, review for first time provides detailed summary luminescent solar concentrators (LSCs), light-emitting diodes (LEDs), cells, photodetectors. In addition, definition, categories, synthesis methods briefly introduced. It is hoped can bring scholars more deeper optoelectronic further promote practical CDs.

Language: Английский

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