Single Atom Catalysts on Carbon-Based Materials

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

Deadline for manuscript submissions: closed (31 January 2019) | Viewed by 5690

Special Issue Editor


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Guest Editor
CNRS, LCC (Laboratoire de Chimie de Coordination), composante ENSIACET, 4 allée Emile Monso, BP 44099, F-31030 Toulouse Cedex 4, France
Interests: carbon (nano)materials; supported catalysis; metallic nanoparticles; surface chemistry; small molecule activation

Special Issue Information

Dear Colleagues,

Most catalytic processes are heterogeneous in nature, and often rely on the use of transition metal particles dispersed on high surface area supports. Faced with the rarefaction of noble metals and, more generally, with the toxicity of certain metals, one approach consists in limiting their use to the strict minimum by using single metal atom catalysts. Such an approach can also induce new reactivity’s in comparison with that of metal particles. A second is to eliminate their use by developing a catalysis without metals. Carbonaceous materials lend themselves perfectly because of their rich surface chemistry to both approaches. They can on the one hand serve as support for isolated metal atoms, but also be doped with a number of heteroatoms, which gives them a catalytic activity.

The aim of this Special Issue is to cover promising recent research and novel trends in the field of single atom catalysts on carbon-based materials, which included both single metal atoms anchored on carbon-based materials (including single site catalysts), and doped carbon (nano)materials. Submissions to this Special Issue on “Single Atom Catalysts on Carbon-Based Materials” are welcome in the form of original research papers that reflect the state of research in the field on the following topics: Preparation of single metal atom catalysts and doped carbon (nano)materials and their characterization, modeling studies related to the stability and/or reactivity of single atom catalysts on carbon (nano)materials, reactivity studies related to single atom catalysts on carbon (nano)materials.

Prof. Dr. Philippe Serp
Guest Editor

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Keywords

  • Carbon materials
  • Single metal atom catalysis
  • Doped-carbon materials
  • Single site catalysts
  • Modeling

Published Papers (1 paper)

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Research

12 pages, 2994 KiB  
Article
Nanoparticles and Single Atoms in Commercial Carbon-Supported Platinum-Group Metal Catalysts
by Urša Petek, Francisco Ruiz-Zepeda, Marjan Bele and Miran Gaberšček
Catalysts 2019, 9(2), 134; https://doi.org/10.3390/catal9020134 - 01 Feb 2019
Cited by 28 | Viewed by 5202
Abstract
Nanoparticles of platinum-group metals (PGM) on carbon supports are widely used as catalysts for a number of chemical and electrochemical conversions on laboratory and industrial scale. The newly emerging field of single-atom catalysis focuses on the ultimate level of metal dispersion, i.e. atomically [...] Read more.
Nanoparticles of platinum-group metals (PGM) on carbon supports are widely used as catalysts for a number of chemical and electrochemical conversions on laboratory and industrial scale. The newly emerging field of single-atom catalysis focuses on the ultimate level of metal dispersion, i.e. atomically dispersed metal species anchored on the substrate surface. However, the presence of single atoms in traditional nanoparticle-based catalysts remains largely overlooked. In this work, we use aberration-corrected scanning transmission electron microscope to investigate four commercially available nanoparticle-based PGM/C catalysts (PGM = Ru, Rh, Pd, Pt). Annular dark-field (ADF) images at high magnifications reveal that in addition to nanoparticles, single atoms are also present on the surface of carbon substrates. Scanning electron microscopy, X-ray diffraction and size distribution analysis show that the materials vary in nanoparticle size and type of carbon support. These observations raise questions about the possible ubiquitous presence of single atoms in conventional nanoparticle PGM/C catalysts and the role they may play in their synthesis, activity, and stability. We critically discuss the observations with regard to the quickly developing field of single atom catalysis. Full article
(This article belongs to the Special Issue Single Atom Catalysts on Carbon-Based Materials)
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