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5.1
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Journals
Processes
Special Issues
Metal Oxides in Heterogeneous Oxidation Catalysis
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Metal Oxides in Heterogeneous Oxidation Catalysis

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Catalysis Enhanced Processes".

Deadline for manuscript submissions: 5 June 2025 | Viewed by 1702

Special Issue Editors

Dr. Chuanqiang Li

E-Mail Website
Guest Editor
College of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China
Interests: metal oxide catalyst; catalytic combustion; catalytic mechanism
Prof. Dr. Licheng Liu

E-Mail Website
Guest Editor
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
Interests: environmental catalysis; industrial catalysis; preparation of catalyst
Prof. Dr. Xin Chen

E-Mail Website
Guest Editor
College of chemistry and chemical engineering, Southwest Petroleum University, Chengdu 610500, China
Interests: electro-catalysis; fuel cell; molecular simulation

Special Issue Information

Dear Colleagues,

In contemporary scientific research and industrial applications, metal oxides have become one of the key materials driving the development of green chemistry and sustainable technologies in the field of heterogeneous catalysis. Through advanced preparation and characterization techniques, metal oxide catalysts exhibit unique physicochemical properties that not only enhance catalytic reaction efficiency but also play a critical role in environmental protection and energy conversion. Metal oxides, with their high stability and excellent redox properties, are widely used in various oxidation reactions, especially heterogeneous catalysis.

This Special Issue will focus on the latest advancements in metal oxides for heterogeneous oxidation catalysis, covering research on their preparation, characterization, applications, and reaction mechanisms. The aim is to provide cutting-edge academic findings and technological insights to both the scientific and industrial communities. We warmly invite researchers and engineers interested in heterogeneous oxidation catalysis to submit their work and help to promote further progress in this field. The specific research topics include, but are not limited to, the following:

  • Innovative methods for the preparation and synthesis of metal oxide catalysts: Exploring new design strategies and efficient preparation processes for metal oxide catalysts;
  • Catalytic applications of metal oxides in thermal oxidation reactions and mechanism studies: Investigating their catalytic performance and mechanisms under high-temperature conditions;
  • Applications of metal oxides in photocatalytic oxidation reactions: Focusing on their contributions to environmental remediation (e.g., pollutant degradation) and energy conversion (e.g., solar hydrogen production);
  • Applications of metal oxides in electrocatalytic oxidation reactions: Including novel applications in water splitting and fuel cells, as well as exploring their catalytic performance enhancements;
  • Applications of metal oxide catalysts in combustion processes and their impact on improving combustion efficiency: Examining their roles in combustion reactions and their optimization of energy utilization efficiency.

Through this Special Issue, we aim to showcase the vast potential of metal oxides in heterogeneous catalysis and provide new insights and directions for the further development of this technology. We encourage researchers worldwide to submit original research papers and review articles exploring the limitless possibilities of metal oxide catalysts in future applications.

Dr. Chuanqiang Li
Prof. Dr. Licheng Liu
Prof. Dr. Xin Chen
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. Processes 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 2400 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 oxide catalyst
  • heterogeneous catalysis
  • innovative synthesis strategy
  • thermal oxidation
  • photocatalytic oxidation
  • electrocatalytic oxidation
  • solid oxide fuel cell

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

21 pages, 11793 KiB  
Article
Nickel-Doped TiO2 Nanoplate Synthesized via Mechanical Ball Milling-Assisted Sol–Gel Method for Photocatalytic Degradation of MB and NO
by Fan Yang, Chenxu Wang, Lingjuan Li, Hang Diao, Yuqing Wang, Xuxu Zheng and Chuanqiang Li
Processes 2025, 13(4), 1192; https://doi.org/10.3390/pr13041192 - 15 Apr 2025
Viewed by 297
Abstract
Nickel-doped titanium dioxide (NIT) with different nickel contents (0.1–1.0 wt%) was prepared via the sol–gel method, combined with mechanical ball milling. X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV–Vis diffuse reflectance spectroscopy (DRS) were employed to characterize the crystalline structure, morphological characteristics, [...] Read more.
Nickel-doped titanium dioxide (NIT) with different nickel contents (0.1–1.0 wt%) was prepared via the sol–gel method, combined with mechanical ball milling. X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV–Vis diffuse reflectance spectroscopy (DRS) were employed to characterize the crystalline structure, morphological characteristics, and optical properties of the samples. The photocatalytic activity was evaluated through the photocatalytic degradation of methylene blue (MB) under visible light and nitric oxide (NO) under simulated sunlight. The XRD results show that all the catalysts retain the anatase phase, confirming that nickel doping does not alter the crystalline structure of TiO2. NIT catalysts exhibited a plate-like morphology due to the ball milling treatment of the precursors. The DRS analysis revealed that nickel modification induced a redshift in the absorption edge of TiO2 and enhanced the visible-light absorption. The photocatalytic tests demonstrated that 0.5 wt% NIT and 0.7 wt% NIT exhibited the highest photocatalytic activity for MB degradation, achieving degradation rates of 93.1% and 91.4% after 60 min, respectively. Moreover, 0.7 wt% NIT showed the optimal NO conversion efficiency of 45.4% after 30 min. The improved photocatalytic performance of the sample is attributed to enhanced visible-light absorption, reduced charge recombination, and a high specific surface area. This study provides a facile strategy for synthesizing Ni-doped TiO2 nanoplates based on the sol–gel method, which is scalable in regard to the industrial production of efficient photocatalysts. Full article
(This article belongs to the Special Issue Metal Oxides in Heterogeneous Oxidation Catalysis)
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24 pages, 10667 KiB  
Article
An Investigation of MnOx and K/MnOx-Based Catalysts on MnO2 and Fe3O4 Supports for the Deep Oxidation of Cyclohexane
by Md Sarwar Kamal, Catherine B. Almquist and David L. Tierney
Processes 2025, 13(3), 634; https://doi.org/10.3390/pr13030634 - 24 Feb 2025
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Abstract
K/MnOx catalysts on MnO2 and Fe3O4 supports were synthesized and compared for the deep oxidation of cyclohexane. The presence of potassium (K) on the catalysts enhanced the catalytic activity compared to catalysts with similar composition but without K. [...] Read more.
K/MnOx catalysts on MnO2 and Fe3O4 supports were synthesized and compared for the deep oxidation of cyclohexane. The presence of potassium (K) on the catalysts enhanced the catalytic activity compared to catalysts with similar composition but without K. Interestingly, the lowest loading of K/MnOx used in this study (0.63 mmoles/g support) performed better than those with higher loadings. The presence of K on the catalysts increased water adsorption, decreased the extent of sintering, and inhibited changes in crystal phase of the catalyst support, as evidenced by TGA, XRD, and BET surface area analyses. The XRD profiles of the catalysts showed mixed crystal phases of MnOx and FeOx species, and EPR results support the presence of mixed valence states of Fe and Mn. The activation energies for MnOx-supported catalysts and FeOx-supported catalysts were approximately 50 kJ/mole and 53 kJ/mole, respectively. Full article
(This article belongs to the Special Issue Metal Oxides in Heterogeneous Oxidation Catalysis)
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