Single‐Atom Catalysts: A Sustainable Pathway for the Advanced Catalytic Applications

Small, Journal Year: 2021, Volume and Issue: 17(16)

Published: Feb. 24, 2021

A heterogeneous catalyst is a backbone of modern sustainable green industries; and understanding the relationship between its structure properties key for advancement. Recently, many upscaling synthesis strategies development variety respectable control atomically precise catalysts are reported explored various important applications in catalysis energy environmental remediation. Precise atomic-scale has allowed to significantly increase activity, selectivity, some cases stability. This approach proved be relevant related technologies such as fuel cell, chemical reactors organic synthesis, Therefore, this review aims critically analyze recent progress on single-atom (SACs) application oxygen reduction reaction, evolution hydrogen and/or electrochemical transformations. Finally, opportunities that may open up future summarized, along with suggesting new possible exploitation SACs.

Language: Английский

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Design and Remarkable Efficiency of the Robust Sandwich Cluster Composite Nanocatalysts ZIF-8@Au₂₅@ZIF-67

Journal of the American Chemical Society, Journal Year: 2020, Volume and Issue: 142(9), P. 4126 - 4130

Published: Feb. 12, 2020

Heterogeneous catalysts with precise surface and interface structures are of great interest to decipher the structure-property relationships maintain remarkable stability while achieving high activity. Here, we report design fabrication new sandwich composites ZIF-8@Au25@ZIF-67[tkn] ZIF-8@Au25@ZIF-8[tkn] [tkn = thickness shell] by coordination-assisted self-assembly well-defined interfaces. The ZIF-8@Au25@ZIF-67 efficiently catalyzed both 4-nitrophenol reduction terminal alkyne carboxylation CO2 under ambient conditions remarkably improved activity stability, compared simple components Au25/ZIF-8 Au25@ZIF-8, highlighting highly useful function ultrathin shell. In addition, performances these composite conveniently regulated shell thickness. This concept achievements should open a avenue targeted nanocatalysts enhanced activities stabilities for challenging reactions.

Language: Английский

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Construction of Six‐Oxygen‐Coordinated Single Ni Sites on g‐C₃N₄ with Boron‐Oxo Species for Photocatalytic Water‐Activation‐Induced CO₂ Reduction

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(48)

Published: Sept. 27, 2021

Abstract The configuration regulation of single‐atom photocatalysts (SAPCs) can significantly influence the interfacial charge transfer and subsequent catalytic process. construction conventional SAPCs for aqueous CO 2 reduction is mainly devoted toward favorable activation photoreduction , however, role water frequently neglected. In this work, single Ni atoms are successfully anchored by boron‐oxo species on g‐C 3 N 4 nanosheets through a facile ion‐exchange method. dative interaction between B atom sp guarantees high dispersion species, where O coordinate with (II) sites to obtain unique six‐oxygen‐coordinated configuration. optimized photocatalyst, rivaling Pt‐modified nanosheets, provides excellent rate CH as products. Quasi‐in‐situ X‐ray photoelectron spectra, transient absorption isotopic labeling, in situ Fourier transform infrared spectra reveal that as‐fabricated effectively capture photoelectrons CN along BO bridges preferentially activate adsorbed produce H eventually induce hydrogen‐assisted reduction. This work diversifies synthetic strategies catalysts insight correlation reaction pathway.

Language: Английский

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Transformation of Atomically Precise Nanoclusters by Ligand-Exchange

Chemistry of Materials, Journal Year: 2019, Volume and Issue: 31(24), P. 9939 - 9969

Published: Nov. 21, 2019

Owing to their atomically precise structures, metal nanoclusters have always served as model molecular tools dissect nanoparticle surface chemistry and investigate structure–property correlations. Ligand exchange of the well-defined nanoclusters, occupying a significant position in conversion chemistry, allows for an atomic-level knowledge understanding structural transformations corresponding property variations. This review covers recent advances ligand nanoclusters. We first present induced by exchange, ranging from homo-gold/silver/copper alloyed The effects reshaping are disclosed well. further discuss accurate routes these ligand-exchange structure transformations. Then, we elaborate on variations, such optical absorptions, fluorescence, catalysis, stability, magnetism, so on. At end this review, current challenges researching well some personal perspectives toward future field, proposed. hopefully provides researchers attempting study with synthetic toolbox techniques that will offer more tailor-made approaches transform over compositions constructions. is based publications available up August 2019.

Language: Английский

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Rare‐Earth Incorporated Alloy Catalysts: Synthesis, Properties, and Applications

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(16)

Published: March 12, 2021

Abstract To improve the performance of metallic catalysts, alloying provides an efficient methodology to design state‐of‐the‐art materials. As emerging functional materials, rare‐earth metal compounds can integrate unique orbital structure and catalytic behavior rare earth elements into Such containing alloy catalysts proffer opportunity tailor electronic properties, tune charged carrier transport, synergize surface reactivity, which are expected significantly stability catalysis. Despite its significance, there only few reviews on alloys or related topics. This review summarizes composition, synthesis, applications in field Subsequent comprehensively summarizing constructively discussing existing work, challenges possibilities future research compound materials evaluated.

Language: Английский

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