Special Issue "Metallic Nanoparticles and Metal-Mediated Synthesis in Catalysis"

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

Deadline for manuscript submissions: 31 December 2022 | Viewed by 1876

Special Issue Editors

Prof. Dr. Elisabete C.B.A. Alegria
E-Mail Website
Guest Editor
1. Chemical Engineering Departament, Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, Lisboa, Portugal
2. Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
Interests: sustainable homogeneous and supported catalysis; green synthesis of metallic nanoparticles; mechanochemistry (synthesis and catalysis); molecular electrochemistry
Special Issues, Collections and Topics in MDPI journals
Dr. Andreia F. Peixoto
E-Mail Website1 Website2
Guest Editor
REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
Interests: heterogeneous catalysis; catalytic biomass valorization; carbon-based materials; Solid acid catalysts; biofuels; renewable energy; biorefinery processes
Special Issues, Collections and Topics in MDPI journals
Dr. Mohamed M. A. Soliman
E-Mail Website
Guest Editor
1. Área Departamental de Engenharia Química, Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, 1500-310 Lisboa, Portugal
2. Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, 1500-310 Lisboa, Portugal
Interests: eco-sustainable catalysis; mechanochemistry; sustainable preparation methods; nanomaterials functionalization

Special Issue Information

Dear Colleagues,

The application of nanotechnology in catalysis and in particular in organic synthesis involving CO and H2 oxidation, hydrocarbons functionalization, nitroarenes and NO reduction or C-C coupling among others, has made important advances in order to achieve the highest catalytic activity and selectivity while maintaining high stability. For this purpose, metallic and bimetallic nanoparticles as well as various types of core-shell nanostructures with specific functions have been developed through various synthetic protocols. Catalytic studies have demonstrated a relationship between size and shape and increasing rates of conversion and selectivity. In addition, bimetallic nanocatalysts have shown a synergistic effect relative to the individual properties of each metal.

For these reasons, we propose as the theme of this Special Issue the development of new metal-based nanocatalysts (with special emphasis on non-noble-metal (Fe, Cu, Ni, Co, etc.)-based nanoparticle catalysts prepared from green synthesis approaches) capable of, in suspension or supported, catalyzing several important reactions including the synthesis of organic compounds, degradation of pollutants and biomass valorization, in an efficient and sustainable way.

Prof. Dr. Elisabete C.B.A. Alegria
Dr. Andreia F. Peixoto
Dr. Mohamed M. A. Soliman
Guest Editors

Manuscript Submission Information

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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 2200 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

  • Metal Nanoparticles
  • Nanocatalysis
  • Core-shell Nanoparticles
  • Metal-mediated Organic Synthesis
  • Catalytic Biomass Valorization

Published Papers (1 paper)

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Research

Article
Glycerol Valorization over ZrO2-Supported Copper Nanoparticles Catalysts Prepared by Chemical Reduction Method
Catalysts 2021, 11(9), 1040; https://doi.org/10.3390/catal11091040 - 28 Aug 2021
Cited by 2 | Viewed by 970
Abstract
Copper nanoparticles (NPs) and ZrO2-supported copper NPs (Cu NPs/ZrO2) were synthesized via a chemical reduction method applying different pH (4, 7 and 9) and evaluated in a glycerol dehydration reaction. Copper NPs were characterized with transmission electron microscopy (TEM) [...] Read more.
Copper nanoparticles (NPs) and ZrO2-supported copper NPs (Cu NPs/ZrO2) were synthesized via a chemical reduction method applying different pH (4, 7 and 9) and evaluated in a glycerol dehydration reaction. Copper NPs were characterized with transmission electron microscopy (TEM) and UV–vis spectroscopy. Transmission electron microcopy (TEM) results revealed a homogeneous distribution of copper NPs. A hypsochromic shift was identified with UV–vis spectroscopy as the pH of the synthesis increased from pH = 4 to pH = 9. Zirconia-supported copper NPs catalysts were characterized using N2 physisorption, X-ray diffraction (XRD), TEM, X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction (TPR), temperature-programmed desorption of ammonia (NH3-TPD) and N2O chemisorption. The presence of ZrO2 in the chemical reduction method confirmed the dispersion of the copper nanoparticles. X-ray diffraction indicated only the presence of tetragonal zirconia patterns in the catalysts. XPS identified the Cu/Zr surface atomic ratio of the catalysts. TPR patterns showed two main peaks for the Cu NPS/ZrO2 pH = 9 catalyst; the first peak between 125 and 180 °C (region I) was ascribed to more dispersed copper species, and the second one between 180 and 250 °C (region II) was assigned to bulk CuO. The catalysts prepared at pH = 4 and pH = 7 only revealed reduction at lower temperatures (region I). Copper dispersion was determined by N2O chemisorption. With NH3-TPD it was found that Cu NPs/ZrO2 pH = 9 exhibited the highest total quantity of acidic sites and the highest apparent kinetic constant, with a value of 0.004 min−1. The different pH applied to the synthesis media of the copper nanoparticles determined the resultant copper dispersion on the ZrO2 support, providing active domains for glycerol conversion. Full article
(This article belongs to the Special Issue Metallic Nanoparticles and Metal-Mediated Synthesis in Catalysis)
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