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Catalysts
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Single-Atom Catalysts (SACs)
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Single-Atom Catalysts (SACs)

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Industrial Catalysis".

Deadline for manuscript submissions: closed (15 March 2024) | Viewed by 4211

Special Issue Editors

Dr. Leiduan Hao

E-Mail Website
Guest Editor
College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Interests: CO2 conversion; green catalysis; catalyst design
Dr. Jilei Xu

E-Mail Website
Guest Editor
Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
Interests: conversion of biomass to chemicals and fuel; single-atom catalysts

Special Issue Information

Dear Colleagues,

Single-atom catalysts (SACs) featuring isolated metal atoms dispersed on supports with maximized atom utilization have received extensive attention in various catalytic processes. In recent years, with the rapid development of SACs and novel technologies, tremendous progress has been made in this area, ranging from their preparation and characterization to the application of SACs. This Special Issue will focus on these different aspects; in particular (but not limited to) the development of new methods for efficient, economic, or large-scale preparation of SACs, characterization or theoretical analysis of the co-ordination structure of single-metal sites, applications of SACs in the areas of thermo-, electro, or photocatalytic energy conversion reactions, biomass conversion, batteries and beyond. Both review and original research articles related to the above scope are welcome.

Dr. Leiduan Hao
Dr. Jilei Xu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Catalysts is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • single-atom catalysts
  • catalyst preparation
  • co-ordination structure
  • theoretical analysis
  • energy conversion reactions
  • biomass conversion
  • electrocatalysts

Published Papers (3 papers)

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Research

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13 pages, 8854 KiB  
Article
A Self-Disperse Copper-Based Catalyst Synthesized via a Dry Mixing Method for Acetylene Hydrochlorination
by Yuru Fu, Xi Sun, Jian Zhang and Jiahui Huang
Catalysts 2024, 14(3), 207; https://0-doi-org.brum.beds.ac.uk/10.3390/catal14030207 - 20 Mar 2024
Viewed by 748
Abstract
Traditional methods for synthesizing single-site catalysts are typically complicated and require special chemicals due to their tendency to agglomerate. In this study, we present a self-disperse copper-based catalyst synthesized via a dry mixing method for acetylene hydrochlorination. During the reaction, the copper precursor [...] Read more.
Traditional methods for synthesizing single-site catalysts are typically complicated and require special chemicals due to their tendency to agglomerate. In this study, we present a self-disperse copper-based catalyst synthesized via a dry mixing method for acetylene hydrochlorination. During the reaction, the copper precursor compounds, i.e., CuBr, and CuI, were converted to CuCl. Subsequently, the formed CuCl crystals underwent a significant structural transformation, leading to the formation of small clusters and Cu single sites. The catalytic activity of 5% CuCl + C prepared through the dry mixing method decreased from 93.7% to 92.9% after 100 h of reaction under the condition of GHSV (C2H2) = 60 mL·h−1·g−1. A comparison of the 5% CuCl + C with the 5% CuCl/C obtained by the impregnation method reveals that the catalytic stability of the former was higher than the one prepared by the conventional impregnation method. The exceptional catalytic performance can be attributed to the reaction-induced active sites being highly dispersed and the porous structure of activated carbon being maximally preserved, which was confirmed by HAADF-STEM, BET, TPR, and TG. The reaction-induced dispersion of CuCl on carbon provides a new strategy for preparing single-site catalysts for acetylene hydrochlorination. Full article
(This article belongs to the Special Issue Single-Atom Catalysts (SACs))
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11 pages, 2780 KiB  
Communication
Discrete Au1(0) Stabilized by 15-Crown-5 for High-Efficiency Catalytic Reduction of Nitrophenol and Nitroaniline
by Xing Shen and Kairui Liu
Catalysts 2023, 13(4), 776; https://0-doi-org.brum.beds.ac.uk/10.3390/catal13040776 - 20 Apr 2023
Viewed by 1028
Abstract
Single-atom catalysts (SACs) have been synthesized using a variety of methods in recent years, and they have shown excellent catalytic activities. However, metal atoms show a high tendency to agglomerate in liquid media, making the single atom synthesis more difficult in liquid media. [...] Read more.
Single-atom catalysts (SACs) have been synthesized using a variety of methods in recent years, and they have shown excellent catalytic activities. However, metal atoms show a high tendency to agglomerate in liquid media, making the single atom synthesis more difficult in liquid media. The synthesis of such metal single-atom catalysts that do not have strong ligand coordination is rarely reported in the literature. Herein, we report the facile synthesis of monodispersed Au atoms (Au1) through the reduction in HAuCl4 in 15-crown-5. The complete reduction in HAuCl4 was confirmed through UV-Vis spectroscopy. In addition, the Au was found in a zero valence state after reduction, which was confirmed through XPS and XANES results. Moreover, the dispersion of Au was confirmed as a single atom (Au1) through transmission electron microscopy and spherical aberration electron microscopy. The possible structure of this catalyst was proposed by matching the EXAFS results with the structure of Au1@15-crown-5 as -(OC2H4O)-AuCl2H2. The Au1@15-crown-5 showed high activity (TOF as high as 22,075) in the reduction in nitrophenol and nitroaniline to aminophenol and phenylenediamine by sodium borohydride. Because of the monodispersion of Au atoms, its performance is much better than noble nanoparticles and non-precious metal catalysts. Full article
(This article belongs to the Special Issue Single-Atom Catalysts (SACs))
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Review

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19 pages, 7415 KiB  
Review
Recent Development of Single-Atom Catalysis for the Functionalization of Alkenes
by Xuetong Yu, Yuxia Ji, Yan Jiang, Rui Lang, Yanxiong Fang and Botao Qiao
Catalysts 2023, 13(4), 730; https://0-doi-org.brum.beds.ac.uk/10.3390/catal13040730 - 12 Apr 2023
Cited by 3 | Viewed by 1890
Abstract
The functionalization of alkenes is one of the most important conversions in synthetic chemistry to prepare numerous fine chemicals. Typical procedures, such as hydrosilylation and hydroformylation, are traditionally catalyzed using homogeneous noble metal complexes, while the highly reactive and stable heterogeneous single-atom catalysts [...] Read more.
The functionalization of alkenes is one of the most important conversions in synthetic chemistry to prepare numerous fine chemicals. Typical procedures, such as hydrosilylation and hydroformylation, are traditionally catalyzed using homogeneous noble metal complexes, while the highly reactive and stable heterogeneous single-atom catalysts (SACs) now provide alternative approaches to fulfill these conversions by combining the advantages of both homogeneous catalysts and heterogeneous nanoparticle catalysts. In this review, the recent achievement in single-atom catalyzed hydrosilylation and hydroformylation reactions are introduced, and we highlight the latest applications of SACs for additive reactions, constructing new C-Y (Y = B, P, S, N) bonds on the terminal carbon atoms of alkenes, and then mention the applications in single-metal-atom catalyzed hydrogenation and epoxidation reactions. We also note that some tandem reactions are conveniently realized in one pot by the concisely fabricated SACs, facilitating the preparation of some pharmaceutical compounds. Lastly, the challenges facing single-atom catalysis for alkene conversions are briefly mentioned. Full article
(This article belongs to the Special Issue Single-Atom Catalysts (SACs))
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