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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Recent Advances in Heterostructure Engineering for Lithium–Sulfur Batteries

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(10)

Published: Jan. 27, 2021

Abstract As a prospective next‐generation energy storage solution, lithium–sulfur batteries excel at their economical attractiveness (sulfur abundance) and electrochemical performance (high density, ≈2600 Wh kg −1 ). However, application is impracticable without addressing the following vital issues: i) shuttling effect of lithium polysulfides (LPSs), ii) sluggish redox conversion kinetics LPSs, iii) large volumetric expansion S after lithiation (≈80%), iv) uncontrollable Li dendritic formation. Recently, many strategies have been proposed to solve these issues, which focused on physical/chemical entrapment catalytic promotion LPSs directional regulation plating/stripping. Designing/constructing heterostructured materials one promising approaches potentially resolve all above challenges with material. In this review, recent advances heterostructures cathodes, interlayers anodes are reviewed in detail. First, fundamental chemistry Li–S principles reinforced described. Second, applications discussed comprehensively. Finally, concise outlook utilizing intrinsic extrinsic properties delivered, aim provide some inspiration for design fabrication advanced batteries.

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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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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Advances in engineering RuO2 electrocatalysts towards oxygen evolution reaction

Chinese Chemical Letters, Journal Year: 2020, Volume and Issue: 32(7), P. 2108 - 2116

Published: Dec. 1, 2020

Language: Английский

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Recent advances in structural engineering of MXene electrocatalysts

Journal of Materials Chemistry A, Journal Year: 2020, Volume and Issue: 8(21), P. 10604 - 10624

Published: Jan. 1, 2020

This review highlights the recent advances in structural engineering of MXene electrocatalysts for hydrogen evolution reaction and beyond.

Language: Английский

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

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: March 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.

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

ACS Catalysis, Journal Year: 2021, Volume and Issue: 11(23), P. 14338 - 14351

Published: Nov. 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.

Language: Английский

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Dual‐Phasic Carbon with Co Single Atoms and Nanoparticles as a Bifunctional Oxygen Electrocatalyst for Rechargeable Zn–Air Batteries

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(42)

Published: July 20, 2021

Abstract The great interest in rechargeable Zn–air batteries (ZABs) arouses extensive research on low‐cost, high‐active, and durable bifunctional electrocatalysts to boost the sluggish oxygen reduction reaction (ORR) evolution (OER). It remains a challenge simultaneously host high‐active independent ORR OER sites single catalyst. Herein dual‐phasic carbon nanoarchitecture consisting of single‐atom phase for nanosized is proposed. Specifically, Co atoms supported nanotubes (single‐atom phase) encapsulated zeolitic‐imidazole‐framework‐derived polyhedron (nanosized are integrated together via nanotube bridges. obtained catalyst shows small overpotential difference 0.74 V between potential at 10 mA cm −2 half‐wave potential. ZAB based demonstrates large power density 172 mW . Furthermore, it charge‐discharge gap 0.51 5 outstanding discharge‐charge cycling durability. This study provides feasible design concept achieve multifunctional catalysts promotes development ZABs.

Language: Английский

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