Characterization of MXenes at every step, from their precursors to single flakes and assembled films

Progress in Materials Science, Journal Year: 2020, Volume and Issue: 120, P. 100757 - 100757

Published: Nov. 2, 2020

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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Surface Coordination Chemistry of Atomically Dispersed Metal Catalysts

Chemical Reviews, Journal Year: 2020, Volume and Issue: 120(21), P. 11810 - 11899

Published: Aug. 13, 2020

Atomically dispersed metal catalysts (ADCs), as an emerging class of heterogeneous catalysts, have been widely investigated during the past two decades. The atomic dispersion nature catalytic centers makes them ideal system for bridging homogeneous and catalysts. recent rapid development new synthetic strategies has led to explosive growth ADCs with a wide spectrum atoms on supports different chemical compositions natures. availability diverse creates powerful materials platform investigating mechanisms complicated catalysis at levels. Considering most are coordinated by donors from supports, this review will demonstrate how surface coordination chemistry plays important role in determining performance ADCs. This start link between catalysis. After brief description advantages limitations common structure characterization methods ADCs, types be discussed. We mainly illustrate local vicinal species support systems act together center determine activity, selectivity, stability dynamic change highlighted. At end review, personal perspectives further field provided.

Language: Английский

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Theoretical insights into single-atom catalysts

Chemical Society Reviews, Journal Year: 2020, Volume and Issue: 49(22), P. 8156 - 8178

Published: Jan. 1, 2020

Single-atom catalysts (SACs) with atomically dispersed metals have emerged as a new class of heterogeneous and attracted considerable interest because they offer 100% metal atom utilization show excellent catalytic behavior compared traditionally supported nano-particles. However, it is challenging to explore the active sites mechanisms SACs through common characterization methods due isolated single atoms. Therefore, employing theoretical calculations determine nature SACs' reaction particularly meaningful. This paper describes by summarizing diverse applications properties SACs, which starts from computational simulation on couple important SACs. Then distinctive fundamental are discussed. At last, challenges future perspectives for outlined.

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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Electrocatalysis of Single-Atom Sites: Impacts of Atomic Coordination

ACS Catalysis, Journal Year: 2020, Volume and Issue: 10(14), P. 7584 - 7618

Published: June 11, 2020

Single metal atoms embedded within select supporting matrices have shown great potential in the development of high-efficiency, low-cost electrocatalysts because maximal atom utilization and mass activity. As single are stabilized by coordination bonds with substrate, strong metal–support interactions can be exploited for ready manipulation electrocatalytic activity selectivity toward target reactions. However, most single-atom catalysts (SACs) prepared pyrolysis contain a wide range structures. Resolving atomic configurations moieties represents critical first step establishment an unambiguous correlation between SAC structure In this Review, we summarize recent progress studies electrocatalysts, focus on impacts sites activities series reactions that important various electrochemical energy technologies, such as hydrogen evolution reaction, oxygen reduction nitrogen CO2 so on. The survey entails SACs, from noble metals (e.g., Pt, Pd, Ru, Ir, Au, etc.) to non-noble Fe, Co, Ni, Cu, etc.), supported variety substrate materials pristine doped carbon, metal, oxide, sulfide, etc.). Finally, Review concludes perspective highlighting promises challenges further SACs context chemistry.

Language: Английский

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Recent Progress in MXene‐Based Materials: Potential High‐Performance Electrocatalysts

Advanced Functional Materials, Journal Year: 2020, Volume and Issue: 30(38)

Published: July 7, 2020

Abstract The family of transition metal carbides, nitrides, and carbonitrides (collectively called MXenes) has been a thriving field since the first invention Ti 3 C 2 T x (MXene) in 2011. MXene is new type nanometer 2D sheet material, which exhibits great application potentials various fields due to its multiple advantages such as high specific surface area, good electrical conductivity, mechanical strength. Electrocatalysis regarded core future clean energy conversion technologies, MXene‐based materials provide inspiration for design preparation electrocatalysts with activity, selectivity, long loading life time. applications electrocatalysis, including hydrogen evolution reaction, nitrogen reduction oxygen carbon dioxide methanol oxidation reaction are summarized this review. As crucial session regarding experiments, current safer more environmentally friendly methods also discussed. Focusing on enhancement methods, key challenges opportunities next‐generation platform both fundamental research practical electrocatalysis presented. This account serves promote efforts toward development MXenes related applications.

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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Microenvironment modulation of single-atom catalysts and their roles in electrochemical energy conversion

Science Advances, Journal Year: 2020, Volume and Issue: 6(39)

Published: Sept. 24, 2020

Microenvironment engineering of single-atom catalysts paves the way toward efficient electrochemical energy conversion.

Language: Английский

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Supports promote single-atom catalysts toward advanced electrocatalysis

Coordination Chemistry Reviews, Journal Year: 2021, Volume and Issue: 451, P. 214261 - 214261

Published: Oct. 21, 2021

Language: Английский

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