Transition metal nitrides for electrochemical energy applications

Chemical Society Reviews, Journal Year: 2020, Volume and Issue: 50(2), P. 1354 - 1390

Published: Dec. 10, 2020

This review comprehensively summarizes the progress on structural and electronic modulation of transition metal nitrides for electrochemical energy applications.

Language: Английский

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Rational Design of Two-Dimensional Transition Metal Carbide/Nitride (MXene) Hybrids and Nanocomposites for Catalytic Energy Storage and Conversion

ACS Nano, Journal Year: 2020, Volume and Issue: 14(9), P. 10834 - 10864

Published: Aug. 12, 2020

Electro-, photo-, and photoelectrocatalysis play a critical role toward the realization of sustainable energy economy. They facilitate numerous redox reactions in storage conversion systems, enabling production chemical feedstock clean fuels from abundant resources like water, carbon dioxide, nitrogen. One major obstacle for their large-scale implementation is scarcity cost-effective, durable, efficient catalysts. A family two-dimensional transition metal carbides, nitrides, carbonitrides (MXenes) has recently emerged as promising earth-abundant candidates large-area catalytic due to unique properties hydrophilicity, high metallic conductivity, ease by solution processing. To take full advantage these desirable properties, MXenes have been combined with other materials form MXene hybrids significantly enhanced performances beyond sum individual components. hybridization tunes electronic structure optimal binding active species improve intrinsic activity while increasing density accessibility sites. This review outlines recent strategies design industrially relevant electrocatalytic, photocatalytic, photoelectrocatalytic applications such water splitting, metal-air/sulfur batteries, dioxide reduction, nitrogen reduction. By clarifying roles material components hybrids, we provide synergistically couple associated highly durable applications. We conclude highlighting key gaps current understanding guide future hybrid designs

Language: Английский

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Metallenes as functional materials in electrocatalysis

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 50(12), P. 6700 - 6719

Published: Jan. 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.

Language: Английский

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MXenes: New Horizons in Catalysis

ACS Catalysis, Journal Year: 2020, Volume and Issue: 10(22), P. 13487 - 13503

Published: Nov. 4, 2020

Two-dimensional transition-metal carbides and nitrides, known as MXenes, have garnered increasing attention for nearly a decade by virtue of their versatile composition structure, stability under certain conditions interest in (electro)catalysis, numerous appealing properties. Given the abundance components, large surface area high laboratory-scale activities, MXenes are promising catalysts supports several heterogeneous catalytic electrocatalytic reactions. This Perspective briefly summarizes most relevant (electro)catalytic processes where hold promise competitive alternatives to traditional Pt-group catalysts. We discuss how interplay metal elements with carbon, nitrogen, various terminations modulates activity MXenes. In particular, we analyze connection between experimental simulated MXene structures differences bulk carbide extended surfaces. The great advances synthesis routes upscaling, combination realistic computational models, may give leading role current quest efficient processes.

Language: Английский

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Status and Prospects of MXene‐Based Lithium–Sulfur Batteries

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(21)

Published: March 5, 2021

Abstract Lithium–sulfur (Li–S) batteries with a theoretical energy density of 2567 Wh kg −1 are very promising next‐generation storage systems, but suffer from the insulativity sulfur and Li 2 S, shuttle effect due to dissolution migration polysulfides, lithium dendrite issue. MXenes, family 2D transition metal carbides/nitrides, which have metallic conductivity, structural variety, strong chemical adsorption ability effective catalytic for fast kinetics, inducing uniform growth Li, exhibit potential high‐performance Li–S batteries. In this review, recent progress achievements MXene‐based summarized, including use MXenes in cathode, interlayer between cathode separator, anode. The architecture construction modification as well hybridization other materials demonstrated. enhancement on electrochemical performance related mechanisms composites discussed. Finally, challenges perspectives battery application also given.

Language: Английский

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Insights into 2D/2D MXene Heterostructures for Improved Synergy in Structure toward Next‐Generation Supercapacitors: A Review

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(18)

Published: Feb. 3, 2022

Abstract 2D interfacial heterostructures have found an unassailable status in energy storage systems, particularly supercapacitors citing the intriguing structural and electrochemical characteristics. Exactly a decade ago, MXene, promising transition metal carbide/nitride/carbonitride was to possess excellent conductivity, hydrophilicity, laudable charge opportunities, enriched surface functionalities conducive for with inherent challenging shortcomings. To substantially improve, assembled 2D/2D MXene exhibit commendable performance backed by fact of swift increase research interest. In this review, state‐of‐the‐art progress material design are investigated. Discussion is initially on fundamentals including synthesis governing properties. Particularly, different preparation electrostatic assembly, situ growth, hydrothermal treatment, objective specific strategies its implications elaborated. Especially, interface science, electrode–electrolyte interaction ion/electron dynamics synergistic enhancement MXene/rGO, MXene/LDH, MXene/metal sulfides timely investigations other architectures provided compatibility from solid‐state microsupercapacitors commerciality. conclude, well‐comprehended outlook, key challenges, prospective guidelines stretching fundamental mechanism electrolyte optimizations presented encourage advanced future generation supercapacitors.

Language: Английский

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Prospects challenges and stability of 2D MXenes for clean energy conversion and storage applications

npj 2D Materials and Applications, Journal Year: 2021, Volume and Issue: 5(1)

Published: June 11, 2021

Abstract Two-dimensional materials have gained immense attention for technological applications owing to their characteristic properties. MXene is one of the fast-growing family 2D that exhibits remarkable physiochemical properties cater numerous in field energy and storage. This review comprises significant advancement discusses evolution design, synthetic strategies, stability. In addition illuminating state-of-the-art applications, we discuss challenges limitations preclude scientific fraternity from realizing functional with controlled structures renewable clean conversion storage applications.

Language: Английский

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

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(17)

Published: March 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.

Language: Английский

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Modulation of Single Atomic Co and Fe Sites on Hollow Carbon Nanospheres as Oxygen Electrodes for Rechargeable Zn–Air Batteries

Small Methods, Journal Year: 2020, Volume and Issue: 5(2)

Published: Oct. 9, 2020

Efficient bifunctional electrocatalysts for oxygen reduction reaction (ORR) and evolution (OER) are required metal air batteries, to replace costly metals, such as Pt Ir/Ru based compounds, which typically used benchmarks ORR OER, respectively. Isolated single atomic sites coordinated with nitrogen on carbon supports (M-N-C) have promising performance replacement of precious catalysts. However, most monometallic M-N-C catalysts demonstrate unsatisfactory performance. Herein, a facile way preparing bimetallic Fe Co entrapped in nitrogen-doped hollow nanospheres (Fe,Co-SA/CS) is explored, drawing the unique structure pore characteristics Zeolitic imidazole frameworks molecular size Ferrocene, an containing species. Fe,Co-SA/CS showed onset potential half wave 0.96 0.86 V, For (Fe,Co)-SA/CS attained its anodic current density 10 mA cm-2 at overpotential 360 mV. Interestingly, electrode activity (ΔE) commercial Pt/C-RuO2 calculated be 0.73 exhibiting catalytic (Fe,Co)-SA/CS. evidenced desirable specific capacity cyclic stability than mixture when utilized cathode homemade Zinc-air battery.

Language: Английский

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MXene Nanoarchitectonics: Defect‐Engineered 2D MXenes towards Enhanced Electrochemical Water Splitting

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

Published: Feb. 15, 2022

Abstract 2D MXenes‐based nanoarchitectures are being actively explored for electrocatalytic water splitting because they possess physical and physiochemical properties that enhance catalytic activity toward the hydrogen evolution reaction oxygen reaction. This review systematically summarizes current strategies involved in defect engineering, including introducing atomic vacancies active edges, doping with metal non‐metal atoms, which have been employed to achieve high‐efficiency catalysts. The electronic structures, optimized adsorption/desorption energies of intermediates, possible mechanisms resulting from various defects disclosed based on combined experimental results theoretical calculations. Current challenges future opportunities mechanistic investigation practical application defective catalysts proposed. report aims reveal nature MXenes electrocatalysts provide valuable guidelines designing reactions.

Language: Английский

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