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Catalysts
Special Issues
Homogeneous and Heterogeneous Catalytic Oxidation and Reduction
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Homogeneous and Heterogeneous Catalytic Oxidation and Reduction

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

Deadline for manuscript submissions: 20 April 2025 | Viewed by 5796

Special Issue Editors

Dr. Weiwei Wang

E-Mail Website
Guest Editor
School of Environment, Nanjing Tech University, Nanjing, China
Interests: heterogeneous catalysis; photocatalysis; sonocatalysis; piezoelectric catalysis; nanozyme catalysis; Fenton-like catalysis
Dr. Xiaxi Yao

E-Mail Website
Guest Editor
School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, China
Interests: nanocatalysis; photocatalysis; photo-electrocatalysis
Dr. Wei Chen

E-Mail Website
Guest Editor
School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou, China
Interests: energy catalysis; photocatalysis; electrocatalysis

Special Issue Information

Dear Colleagues,

So far, apart from enzymatic catalysis, we has seen ever-increasing interest in homogeneous and heterogeneous catalytic oxidation and reduction for target reactions in various fields, including energy, environment, and health. Catalytic activity, selectivity, and stability for various oxidation and reduction reactions play a crucial role in both homogeneous and heterogeneous catalysis; however, it remains challenging to develop rational design and regulation strategies for catalysts and to establish effective reaction mechanisms.

Although many efforts have been made to tune catalytic performance, it is still a huge challenge to strive to establish structure–activity relationships. The key points regarding this relationship include active center and active sites, local active regions, valence states, catalyst specificity, promoters or co-catalysts, deactivation, etc. The design, optimization, and understanding of active structures and compositions are key goals in the field of catalysis, with implications for various industries.

To better understand and design more efficient and selective catalysts, this Special Issue of Catalysts is dedicated to the trends and directions of various catalytic oxidation and reduction processes, including Fenton, Fenton-like, enzyme catalysis, enzyme-like catalysis, photocatalysis, sonocatalysis, piezoelectric-catalysis, photo-electrocatalysis, nanocatalysis, single-atom catalysis, etc. In this Special Issue, original research articles and reviews are welcome. Research areas may include (but not are limited to) the following:

  • High-throughput and green synthesis of homogeneous and heterogeneous catalysts (nanomaterials, single-atomic catalysts, and heterojunctions);
  • Development, mechanism, and application of co-catalysis;
  • Development of catalytic oxidation and reduction processes by Fenton, Fenton-like, enzyme-like catalysis, photocatalysis, sonocatalysis, piezoelectric-catalysis, and photo-electrocatalysis;
  • Process optimization and modeling of catalytic systems for environmental remediation, energy conversion, and biomedical therapy;
  • Machine learning for computational homogeneous and heterogeneous catalysis.

We look forward to receiving your contributions.

Dr. Weiwei Wang
Dr. Xiaxi Yao
Dr. Wei 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. 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

  • catalytic oxidation
  • catalytic reduction
  • Fenton
  • Fenton-like
  • enzyme-like catalysis
  • photocatalysis
  • sonocatalysis
  • electrocatalysis
  • piezoelectric catalysis
  • co-catalysis

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Published Papers (3 papers)

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Research

12 pages, 3298 KiB  
Article
Insight into the Mechanism of Ultrasonic Activation of Persulfate for Enhancing the Removal of Tetracycline Hydrochloride
by Wenlong Yang, Chun Lu, Xiaoxiao Liu, Guangze Nie and Weiwei Wang
Catalysts 2025, 15(1), 51; https://doi.org/10.3390/catal15010051 - 8 Jan 2025
Viewed by 400
Abstract
Tetracycline is often used in treating various diseases or infections, which also leads to severe environmental threats due to its toxicity, durability, and low biodegradation. Meanwhile, although ultrasound (US)-assisted activation of persulfate (PS) is a promising technology for water and wastewater treatment, its [...] Read more.
Tetracycline is often used in treating various diseases or infections, which also leads to severe environmental threats due to its toxicity, durability, and low biodegradation. Meanwhile, although ultrasound (US)-assisted activation of persulfate (PS) is a promising technology for water and wastewater treatment, its reaction mechanism is still not well-defined. Herein, we explored the effect of the enhanced mechanism of ultrasonic activation of peroxymonosulfate (PMS) on the degradation of tetracycline hydrochloride (TCH). The findings revealed that the US/PMS system was highly effective in degrading TCH, achieving an 83.2% degradation efficiency for a TCH concentration of 10 mg/L within 3 h. Moreover, the combination of radical quenching experiments and electron paramagnetic resonance (EPR) analysis confirmed the generation of different types of reactive radicals (such as sulfate radical (SO4•−), hydroxyl radical (•OH), superoxide anions (•O2−), and singlet oxygen (1O2)) upon PMS activation under ultrasonic cavitation. Thus, US-assisted activation of persulfate is a more promising strategy for efficient removal of refractory organic contaminants in wastewater. Full article
(This article belongs to the Special Issue Homogeneous and Heterogeneous Catalytic Oxidation and Reduction)
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12 pages, 2732 KiB  
Article
Tuning Surface State in CoFe (Oxy)Hydroxide for Improved Oxygen Evolution Electrocatalysis
by Wen Guo, Chizhong Wang, Lei Qiu, Fanghua Liu, Sizhe Chen and Huazhen Chang
Catalysts 2025, 15(1), 11; https://doi.org/10.3390/catal15010011 - 26 Dec 2024
Viewed by 585
Abstract
CoFe-based catalysts have shown excellent activity for the oxygen evolution reaction (OER), with the oxidation states of the active sites playing a crucial role in determining catalytic performance. However, how to effectively increase the oxidation state of these active sites remains a key [...] Read more.
CoFe-based catalysts have shown excellent activity for the oxygen evolution reaction (OER), with the oxidation states of the active sites playing a crucial role in determining catalytic performance. However, how to effectively increase the oxidation state of these active sites remains a key challenge. In this work, a facile treatment with NaBH4 solution was employed to modulate the surface state of CoFeOxHy catalysts, inducing an enhanced OER activity. The overpotential at 10 mA cm−2 for the NaBH4-treated CoFe catalyst was reduced to 270 mV, indicating improved OER activity. X-ray diffraction (XRD), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) results reveal that NaBH4 treatment induced a phase reconstruction of the CoFe oxalate framework, a critical step in enhancing its catalytic properties. The strong reducing ability of NaBH4 strengthened the Co-Fe interaction, allowing the retention of low-valence Co species while facilitating the formation of high-valence Fe sites. This dual modulation of Co and Fe oxidation states significantly accelerated charge transfer kinetics, ultimately boosting OER performance. These findings highlight the importance of improving the oxidation states of active sites in CoFe-based catalysts, providing insights for developing efficient catalysts for electrochemical water splitting. Full article
(This article belongs to the Special Issue Homogeneous and Heterogeneous Catalytic Oxidation and Reduction)
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15 pages, 2562 KiB  
Article
Sludge Recycling from Non-Lime Purification of Electrolysis Wastewater: Bridge from Contaminant Removal to Waste-Derived NOX SCR Catalyst
by Ju Gao, Fucheng Sun, Pei Liu, Jizhi Zhou and Yufeng Zhang
Catalysts 2024, 14(8), 535; https://doi.org/10.3390/catal14080535 - 17 Aug 2024
Viewed by 4180
Abstract
Catalysts for the selective catalytic reduction (NOX SCR) of nitrogen oxides can be obtained from sludge in industrial waste treatment, and, due to the complex composition of sludge, NOX SCR shows various SCR efficiencies. In the current work, an SCR catalyst [...] Read more.
Catalysts for the selective catalytic reduction (NOX SCR) of nitrogen oxides can be obtained from sludge in industrial waste treatment, and, due to the complex composition of sludge, NOX SCR shows various SCR efficiencies. In the current work, an SCR catalyst developed from the sludge produced with Fe/C micro-electrolysis Fenton technology (MEF) in wastewater treatment was investigated, taking into account various sludge compositions, Fe/C ratios, and contaminant contents. It was found that, at about 300 °C, the NOX removal rate could reach 100% and there was a wide decomposition temperature zone. The effect of individual components of electroplating sludge, i.e., P, Fe and Ni, on NOX degradation performance of the obtained solids was investigated. It was found that the best effect was achieved when the Fe/P was 8/3 wt%, and variations in the Ni content had a limited effect on the NOX degradation performance. When the Fe/C was 1:2 and the Fe/C/P was 1:2:0.4, the electroplating sludge formed after treatment with Fe/C MEF provided the best NOX removal rate at 100%. Moreover, the characterization results show that the activated carbon was also involved in the catalytic reduction degradation of NOX. An excessive Fe content may cause agglomeration on the catalyst surface and thus affect the catalytic efficiency. The addition of P effectively reduces the catalytic reaction temperature, and the formation of phosphate promotes the generation of adsorbed oxygen, which in turn contributes to improvements in catalytic efficiency. Therefore, our work suggests that controlling the composition in the sludge is an efficient way to modulate SCR catalysis, providing a bridge from contaminant-bearing waste to efficient catalyst. Full article
(This article belongs to the Special Issue Homogeneous and Heterogeneous Catalytic Oxidation and Reduction)
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