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Catalysts
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Design and Synthesis of Nanostructured Catalysts, 2nd Edition
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Design and Synthesis of Nanostructured Catalysts, 2nd Edition

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

Deadline for manuscript submissions: 10 November 2024 | Viewed by 6011

Special Issue Editor

Dr. Dinesh Kumar

E-Mail Website
Guest Editor
Department of Bionanotechnology and Bioconvergence Engineering, Division of Mechanical Design Engineering, Jeonbuk National University, Jeonju, Republic of Korea
Interests: plasmonic nanophotonics; heterogeneous catalysis; artificial photosynthesis; renewable energy; biofuels; biomaterials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Following the first successful Special Issue on this topic (available here), we are happy to announce a second edition entitled “Design and Synthesis of Nanostructured Catalysts, 2nd Edition”.

Catalytic studies have been significantly advanced with the emergence of nanotechnology as a key technology of modern times. Nanotechnology has progressed synthetic techniques so that they may control and maintain uniformity in shape, size, morphology, and composition and excel catalytic performance. Nanostructured catalysts of metals, oxides, semiconductors, and other compounds transpire at the interface between heterogeneous and homogeneous catalytic processes and enable for high efficiency, better selectivity, great stability, easier recovery, and recycling. The nanostructured catalysts are the focus of this Special Issue, which aims to cover the synthesis of numerous nanostructured catalysts, such as metal oxides (alkali, alkaline, transition metal oxides), photocatalytic nanomaterials, nanofibrous materials, in addition to applications in CO2 conversion, hydrogen production, fuel cells, composite solid rocket propellants, energy storage, medicines, dye, bio-fuels production, water purification, and many other chemical reactions such as electrocatalytic processes, photocatalytic reactions, coupling reactions, hydrogenation, reduction reactions, oxidation reactions, and others.

Dr. Dinesh Kumar
Guest Editor

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 2700 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

  • plasmonic nanomaterials
  • metal nano-oxides
  • metal organic frameworks
  • semiconductor nanostructures
  • 2D materials
  • surface engineered catalysts
  • defect engineering
  • electrocatalysts
  • photocatalysts

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Related Special Issue

Published Papers (4 papers)

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Research

12 pages, 1981 KiB  
Article
Study on the Catalytic Activity and Selectivity of Manganese Dioxide-Modified Nickel–Iron-Based Hydroxide Electrodes for Initiating the Oxygen Evolution Reaction in Natural Seawater
by Fangfang Liu, Miaomiao Fan, Haofeng Yan, Zheng Wang, Jimei Song, Hui Wang and Jianwei Ren
Catalysts 2024, 14(8), 502; https://doi.org/10.3390/catal14080502 - 2 Aug 2024
Viewed by 603
Abstract
Transition metal oxides, particularly NiFe(OH)2, are recognized for their high oxygen evolution reaction (OER) activity and structural stability. However, their performance in natural seawater electrolysis remains insufficiently studied. Manganese dioxide (MnO2), which is known for its multiple crystal phases [...] Read more.
Transition metal oxides, particularly NiFe(OH)2, are recognized for their high oxygen evolution reaction (OER) activity and structural stability. However, their performance in natural seawater electrolysis remains insufficiently studied. Manganese dioxide (MnO2), which is known for its multiple crystal phases and high OER selectivity, can be incorporated to enhance the catalytic properties. In this study, the OER catalytic performance of carbon cloth-supported manganese dioxide-modified nickel–iron bimetallic hydroxide (MnO2-NiFe-LDH/CC) electrodes was explored in both alkaline and natural seawater. Electrochemical tests demonstrated that the MnO2-NiFe-LDH/CC electrode achieved overpotentials of 284 mV and 363 mV at current densities of 10 mA·cm−2 and 100 mA·cm−2, respectively, with a Tafel slope of 68.6 mV·dec−1 in alkaline seawater. Most importantly, the prepared MnO2-NiFe-LDH/CC electrode maintained stable OER performance over 120 h of testing. In natural seawater, the MnO2-NiFe-LDH/CC electrode outperformed the NiFe-LDH/CC electrode by exhibiting an oxygen evolution selectivity of 61.1%. This study highlights the potential of MnO2-modified nickel–iron-based materials for efficient and stable OER in seawater electrolysis, which offers a promising approach for sustainable hydrogen production in coastal desert regions. Full article
(This article belongs to the Special Issue Design and Synthesis of Nanostructured Catalysts, 2nd Edition)
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18 pages, 10039 KiB  
Article
Engineering the Integration of Titanium and Nickel into Zinc Oxide Nanocomposites through Nanolayered Structures and Nanohybrids to Design Effective Photocatalysts for Purifying Water from Industrial Pollutants
by Osama Saber, Aya Osama, Nagih M. Shaalan and Mostafa Osama
Catalysts 2024, 14(6), 340; https://doi.org/10.3390/catal14060340 - 24 May 2024
Viewed by 892
Abstract
Water pollution is one of the main challenges currently facing scientists around the world because of the rapid growth in industrial activities. On this basis, 2D nanolayered and nanohybrid structures, which are based on a ternary system of nickel–titanium–zinc, are considered favorable sources [...] Read more.
Water pollution is one of the main challenges currently facing scientists around the world because of the rapid growth in industrial activities. On this basis, 2D nanolayered and nanohybrid structures, which are based on a ternary system of nickel–titanium–zinc, are considered favorable sources for designing effective nanocomposites for the photocatalytic degradation of industrial pollutants in a short period of time. These nanocomposites were designed by modifying two-dimensional nanolayers to produce a three-dimensional porous structure of multi-doped Ni/Ti-ZnO nanocomposites. Additionally, another additive was produced by constructing nanohybrids of nickel–titanium–zinc combined with a series of hydrocarbons (n-capric acid, myristic acid, stearic acid, suberic acid, and sebacic acid). Energy-dispersive X-ray spectrometry, X-ray diffraction, scanning electron microscopy, infrared spectroscopy, and thermal analyses confirmed the growth of the nanolayered and nanohybrid materials in addition to the production of nanocomposites. The positive role of the dopants (nickel and titanium) in producing an effective photocatalyst was observed through a significant narrowing of the band gap of zinc oxide to 3.05–3.10 eV. Additionally, the high photocatalytic activity of this nanocomposite enabled the complete removal of colored dye from water after 25 min of UV radiation. In conclusion, this study proposes an unconventional approach for designing new optical nanocomposites for purifying water. Additionally, it suggests a novel supporting method for designing new kinds of nanohybrids based on multi-metals and organic acids. Full article
(This article belongs to the Special Issue Design and Synthesis of Nanostructured Catalysts, 2nd Edition)
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16 pages, 5621 KiB  
Article
Catalytic Reductive Degradation of 4-Nitrophenol and Methyl orange by Novel Cobalt Oxide Nanocomposites
by Hawra A. Bukhamsin, Hassan H. Hammud, Chawki Awada and Thirumurugan Prakasam
Catalysts 2024, 14(1), 89; https://doi.org/10.3390/catal14010089 - 21 Jan 2024
Cited by 3 | Viewed by 2091
Abstract
Cobalt oxide nanocomposites were synthesized and used for the catalytic degradation of 4-nitrophenol (4-NP) and methyl orange (MO). Cobalt oxide nanocomposites PyroHAB9 was prepared by heating cobalt acetylacetonate complex HAB9 at 300 °C, while PyroHAB19 was prepared by heating cobalt acetylacetonate–carboxymethyl cellulose complex [...] Read more.
Cobalt oxide nanocomposites were synthesized and used for the catalytic degradation of 4-nitrophenol (4-NP) and methyl orange (MO). Cobalt oxide nanocomposites PyroHAB9 was prepared by heating cobalt acetylacetonate complex HAB9 at 300 °C, while PyroHAB19 was prepared by heating cobalt acetylacetonate–carboxymethyl cellulose complex at 300 °C. FTIR indicated the presence of Co3O4 species, while Raman spectrum indicated the presence of graphite in PyroHAB19. The SEM morphology of nanocomposites exhibited irregular spherical shape nanoparticles with sizes ranging between 20 to 60 nm. Additionally, nanowires were also seen in HAB19. Also, 2Ɵ peaks in PXRD revealed the formation of Co3O4 in HAB19. Cyclic voltammetry indicated enhanced electrochemical redox activity of HAB19. The structures of the nanocomposites were related to their catalytic activities. The turnover frequency (TOF) values of the catalytic reduction of p-nitrophenol (P-NP) and methyl orange (MO) were greater for HAB19 compared to HAB9 nano-catalysts. Also, the TOF values of the catalytic reduction of MO were greater than that of P-NP by both nano-catalysts. It is obvious that the rate constants of catalytic reductions for MO by metal oxide nanocomposites were greater than the corresponding rate constants for PNP. The highest rate constant was found for PyroHAB19 in MO reduction. Full article
(This article belongs to the Special Issue Design and Synthesis of Nanostructured Catalysts, 2nd Edition)
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Graphical abstract

18 pages, 9874 KiB  
Article
Tuning the Magnetic and Catalytic Properties of Manganese Ferrite through Zn2+ Doping: Gas Phase Oxidation of Octanol
by Mehnaz Bibi, Muhammad Sadiq, Moustafa A. Rizk, Raiedhah A. Alsaiari, Zaffar Iqbal and Zahid Ali
Catalysts 2023, 13(12), 1473; https://doi.org/10.3390/catal13121473 - 27 Nov 2023
Viewed by 1369
Abstract
Spinel ferrites, ZnFe2O4, MnFe2O4, and ZnMnFe2O4, were synthesized using the sol–gel method and thoroughly investigated for their potential as catalytic and magnetic materials. Experiments unveiled that ZnMnFe2O4 exhibited [...] Read more.
Spinel ferrites, ZnFe2O4, MnFe2O4, and ZnMnFe2O4, were synthesized using the sol–gel method and thoroughly investigated for their potential as catalytic and magnetic materials. Experiments unveiled that ZnMnFe2O4 exhibited excellent catalytic and magnetic properties, whereas the Density Functional Theory (DFT) calculations provided insight into the excellent performance of ZnMnFe2O4 compared with ZnFe2O4 and MnFe2O4. The catalytic efficiencies of the synthesized spinel ferrites were evaluated against a model reaction, i.e., the gas-phase oxidation of octanol to a corresponding aldehyde, utilizing molecular oxygen as an oxidant. The results indicated that the order of catalytic activity was ZnMnFe2O4 > MnFe2O4 > ZnFe2O4. The reaction was found to follow Langmuir Hinshelwood’s mechanism for dissociative adsorption of molecular oxygen. Owing to their superb catalytic and magnetic properties, mixed ferrites can be extended to a variety of organic transformation reactions. Full article
(This article belongs to the Special Issue Design and Synthesis of Nanostructured Catalysts, 2nd Edition)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Dynamic Photocatalytic Activity of Zn doped CdS Nanoparticles: Structural and Morphological Characteristics
Author: Jothibas
Highlights: The synthesized Zn doped CdS Nanoparticle shows uniform structures. The photocatalytic degradation efficiency was achieved to be 96% for Acid blue dyes The effective doping concentration was studied among different doping concentration

Title: FeCo bimetallic Metal Organic Framework/Carbon Nitride Heterojunction Photocatalysts for Efficient CO2 Photoreduction
Authors: Xuan-He Liu
Affiliation: School of Science, China University of Geosciences (Beijing), Beijing 100083, China
Abstract: Heterojunction engineering is an effective strategy for enhancing charge carrier separation and photocatalytic activity. In this study, we synthesized a FeCo bimetallic metal-organic framework/carbon nitride heterojunction (FeCo-MOF/CN) for tCO2 photoreduction to CO. The FeCo-MOF/CN exhibited improved separation and transport of photogenerated charges, leading to enhanced catalytic activity. It achieved a high CO yield rate of 3230.3 μmol·g⁻¹ within 5 h, which was approximately 86.8 times greater than that of carbon nitride (CN), which yielded only 37.2 μmol·g⁻¹. This work presented insights into the photocatalyst design for visible-light-driven CO2 reduction.

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