Advances in Metal-Based Catalysts

A special issue of ChemEngineering (ISSN 2305-7084).

Deadline for manuscript submissions: closed (16 October 2019) | Viewed by 9189

Special Issue Editors


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Guest Editor
Institut d’Alembert, Sorbonne Université, CNRS UMR7190, 2 pl de la Gare de Ceinture, 78210 St Cyr L’Ecole, France
Interests: kinetics; catalysis; thermodynamics; fuels; catalytic process; catalytic pollution control processes; chemistry of combustion
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Guest Editor
CNRS, Institut Jean Le Rond d’Alembert, Sorbonne Université, Paris, France
Interests: catalysis; chemical engineering; process intensification; thermochemistry
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Whether precious or non-noble, metals and their derived compounds—such as oxides, carbides, phosphides and nitrides—nowadays occupy a major role in a wide variety of catalytic processes. Their role as an active phase, supported or not on the surface of very different materials, has been extensively discussed but remains a subject of major concern, and new investigations are opened each day in order to find new metal–support or metal–metal combinations leading to improved catalytic performance.

The current Special Issue aims to gather the most innovative research on metal-based catalysts for any relevant catalytic process. Contributions on novel formulations, preparation procedures, detailed studies of durability and catalyst deactivation, as well as original pathways for the utilization of metal-containing catalysts, such as photo and/or electro-catalysis, will be welcomed.

Thank you very much!

Prof. Dr. Patrick Da Costa
Dr. Maria Elena Galvez
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. ChemEngineering is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

  • Metals
  • catalysis
  • catalyst preparation
  • chemical process
  • deactivation

Published Papers (2 papers)

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Research

12 pages, 3299 KiB  
Article
The Effect of Cu and Ga Doped ZnIn2S4 under Visible Light on the High Generation of H2 Production
by Ikki Tateishi, Mai Furukawa, Hideyuki Katsumata and Satoshi Kaneco
ChemEngineering 2019, 3(4), 79; https://doi.org/10.3390/chemengineering3040079 - 29 Sep 2019
Cited by 8 | Viewed by 3511
Abstract
A Cu+ and Ga3+ co-doped ZnIn2S4 photocatalyst (Zn(1−2x)(CuGa)xIn2S4) with controlled band gap was prepared via a simple one-step solvothermal method. Zn(1−2x)(CuGa)xIn2S4 acted as [...] Read more.
A Cu+ and Ga3+ co-doped ZnIn2S4 photocatalyst (Zn(1−2x)(CuGa)xIn2S4) with controlled band gap was prepared via a simple one-step solvothermal method. Zn(1−2x)(CuGa)xIn2S4 acted as an efficient photocatalyst for H2 evolution under visible light irradiation (λ > 420 nm; 4500 µW/cm2). The effects of the (Cu and Ga)/Zn molar ratios of Zn(1−2x)(CuGa)xIn2S4 on the crystal structure (hexagonal structure), morphology (microsphere-like flower), optical property (light harvesting activity and charge hole separation ability), and photocatalytic activity have been investigated in detail. The maximum H2 evolution rate (1650 µmol·h−1·g−1) was achieved over Zn0.84(CuGa)0.13In2S4, showing a 3.3 times higher rate than that of untreated ZnIn2S4. The bandgap energy of Zn(1−2x)(CuGa)xIn2S4 decreased from 2.67 to 1.90 eV as the amount of doping Cu+ and Ga3+ increased. Full article
(This article belongs to the Special Issue Advances in Metal-Based Catalysts)
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13 pages, 3051 KiB  
Article
Novel Photocatalytic NH3 Synthesis by NO3 Reduction over CuAg/TiO2
by Ryota Kato, Mai Furukawa, Ikki Tateishi, Hideyuki Katsumata and Satoshi Kaneco
ChemEngineering 2019, 3(2), 49; https://doi.org/10.3390/chemengineering3020049 - 8 May 2019
Cited by 11 | Viewed by 5171
Abstract
The highly effective reaction system was investigated for the photocatalytic ammonia synthesis from the reduction of nitrate ions by using the semiconductor photocatalyst, Cu and Ag doped on TiO2 (CuAg/TiO2) at room temperature under UV light irradiation (max. 352 nm). [...] Read more.
The highly effective reaction system was investigated for the photocatalytic ammonia synthesis from the reduction of nitrate ions by using the semiconductor photocatalyst, Cu and Ag doped on TiO2 (CuAg/TiO2) at room temperature under UV light irradiation (max. 352 nm). In this study, CuAg/TiO2 gave the high efficiency and the selectivity for the ammonia synthesis by the photoreduction of nitrate in the presence of methanol as a hole scavenger. For the evaluation of the photocatalytic activity over CuAg/TiO2, various TiO2 samples, such as standard TiO2, Cu/TiO2, and Ag/TiO2, were evaluated in the same procedure. The chemical properties were investigated by XRD, TEM, XPS, PL, and DRS. We examined the optimum conditions for the experimental factors and the important issues, including the effect of the molar ratio of Cu and Ag onto TiO2, the optimization of the CuAg amount loaded on TiO2, the influence of the loading amount of the catalyst on the reduction of nitrate ions, the exploration of the optimum hole scavenger, and the reusability of the optimum photocatalyst. The very efficient conversion of nitrate ions (95%) and the highest selectivity (86%) were achieved in the reaction with the optimum conditions. Here, we reported the process that nitrate ions can efficiently be reduced, and ammonia can be selectively synthesized over CuAg/TiO2. Full article
(This article belongs to the Special Issue Advances in Metal-Based Catalysts)
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