Nanostructures for Enhanced Catalytic Activity

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: 31 March 2025 | Viewed by 1117

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College of Science, China University of Petroleum, Beijing 102249, China
Interests: environmental catalysis; photocatalysis; CO2 conversion; vehicle exhaust gas purification
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Dear Colleagues,

Nanomaterials, as a catalyst with a high surface area, many active sites and outstanding stability, have attracted more and more attention in the field of catalysis. Compared with micron structure, nanostructure has a smaller size and higher specific surface area, which makes nanostructure activity much better. In addition, nanostructures, due to their size effects, are responsible for producing very specific properties in some catalytic reactions, such as the formation of intermediates and the pathways of the reaction. At present, the use of nanostructures to improve the performance of catalytic materials has become a research frontier. It has been found that adding nanomaterials such as nano-metals and nano-oxides to traditional catalysts can significantly enhance their catalytic activity. In some reactions or catalyst synthesis processes, adding a certain dose of nanostructures also has a significant effect on improving the activity of catalysts. For example, adding nanomaterials such as nano-barium sulfate to the palladium catalyzed reaction system can greatly improve the reaction rate and reduce the amount of palladium. To develop nanomaterials with higher selectivity and activity, various nanomaterials, advanced preparation methods and in-depth reaction mechanisms have been developed.

This Special Issue of Nanomaterials aims to collect state-of-the-art work on nanostructures for enhancing catalytic activity, from a fundamental and application perspective. The format of expected articles includes full papers, communications and reviews.

Prof. Dr. Yuechang Wei
Guest Editor

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Keywords

  • nanostructures for enhancing catalytic activity
  • metal oxides
  • metal sulfides
  • noble metal nanoparticles
  • selectivity and stability
  • theoretical calculations
  • intermediate reaction pathway
  • electron transfer channel
  • basic research and industrial applications

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Published Papers (1 paper)

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Research

21 pages, 5540 KiB  
Article
Pd Catalysts Supported on Mixed Iron and Titanium Oxides in Phenylacetylene Hydrogenation: Effect of TiO2 Content in Magnetic Support Material
by Eldar T. Talgatov, Akzhol A. Naizabayev, Farida U. Bukharbayeva, Alima M. Kenzheyeva, Raiymbek Yersaiyn, Assemgul S. Auyezkhanova, Sandugash N. Akhmetova, Evgeniy V. Zhizhin and Alexandr R. Brodskiy
Nanomaterials 2024, 14(17), 1392; https://doi.org/10.3390/nano14171392 - 26 Aug 2024
Cited by 1 | Viewed by 839
Abstract
Recently, Pd catalysts supported on magnetic nanoparticles (MNPs) have attracted a great attention due to their ability of easy separation with an external magnet. Modification of MNPs is successfully used to obtain Pd magnetic catalysts with enhanced catalytic activity. In this work, we [...] Read more.
Recently, Pd catalysts supported on magnetic nanoparticles (MNPs) have attracted a great attention due to their ability of easy separation with an external magnet. Modification of MNPs is successfully used to obtain Pd magnetic catalysts with enhanced catalytic activity. In this work, we discussed the effect of titania content in TiO2/MNPs support materials on catalytic properties of Pd@TiO2/MNPs catalysts in phenylacetylene hydrogenation. TiO2/MNPs composites were prepared by simple ultrasound-assisted mixing of TiO2 and MNPs, synthesized by co-precipitation method. This was followed by deposition of palladium ions on the mixed metal oxides using NaOH as precipitant. The supports and catalysts were characterized using XRD, BET, STEM, EDX, XPS, and a SQUID magnetometer. Pd nanoparticles (5–6 nm) formed were found to be homogeneously distributed on support materials representing the well-mixed metal oxides with TiO2 content of 10, 30, 50, or 70%wt. Testing of the catalysts in phenylacetylene hydrogenation showed that their activity increased with increasing TiO2 content, and the process was faster in alkali medium (pH = 10). The hydrogenation rates of triple and double C–C bonds on Pd@70TiO2/MNPs achieved 9.3 × 10−6 mol/s and 23.1 × 10−6 mol/s, respectively, and selectivity to styrene was 96%. The catalyst can be easily recovered with an external magnet and reused for 12 runs without significant degradation in the catalytic activity. The improved catalytic properties of Pd@70TiO2/MNPs can be explained by the fact that the surface of the support is mainly composed of TiO2 particles, affecting the state and size of Pd species. Full article
(This article belongs to the Special Issue Nanostructures for Enhanced Catalytic Activity)
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