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Metal or Bimetallic Nanocatalysts for Environmental Engineering Applications

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

Deadline for manuscript submissions: closed (31 October 2020) | Viewed by 11262

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Special Issue Editors

Prof. Dr. Jaroslaw Polanski

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Guest Editor

Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland
Interests: heterogeneous catalysis; nanocatalysis; porous solids; catalytic carbon (di)oxide methanation; catalytic biomass conversion
Special Issues, Collections and Topics in MDPI journals

Dr. Maciej Kapkowski

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Guest Editor

Faculty of Science and Technology, Institute of Chemistry, University of Silesia in Katowice, Szkolna 9, 40-006 Katowice, Poland
Interests: Nanomaterials, Synthesis, Nanoparticles, Heterogeneous Catalysis, Catalyst Characterization, Catalyst Synthesis, Oxidation, Green Chemistry Technologies, Nano-Catalysis

Special Issue Information

Dear Colleagues,

The activity of a nanocatalyst depends critically upon its structure. Accordingly, the combination of metals within the catalyst provides an opportunity for the extensive manipulation of the structure, which is a chance to discover unexpected reactivity and investigate structure–reactivity relationships. This enriches our knowledge in the design protocols of potentially active nanocatalyst systems and supplies novel active catalyst candidates. Therefore, catalysts based on bimetallic particles are of interest both from scientific and technological points of view. Recently, an increasing amount of interest has been devoted to the application of such systems in environmental engineering. A variety of bimetallic combinations and structural forms have been reported in this area. This includes especially carbon (di)oxide methanation or biomass conversion. In this Special Issue “Metal or Bimetallic Nanocatalysts for Environmental Engineering Applications” collecting original research papers, reviews and short communications, we will focus especially on low-temperature processes engaging the most promising metal conjugations.

Manuscripts concerning new innovative methods for the investigation of catalyst structures for environmental catalysis will be especially welcome. Reports on photocatalytic options are strongly encouraged.

Prof. Dr. Jaroslaw Polanski
Dr. Maciej Kapkowski
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 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

Environmental catalysis
Low temperature processing
Bimetallic catalyst combinations
Catalyst design
Carbon (di)oxide methanation
Biomass conversion

Published Papers (3 papers)

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Research

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14 pages, 2865 KiB

Open AccessFeature PaperEditor’s ChoiceArticle

Nano-Ru Supported on Ni Nanowires for Low-Temperature Carbon Dioxide Methanation

by Tomasz Siudyga, Maciej Kapkowski, Dawid Janas, Tomasz Wasiak, Rafał Sitko, Maciej Zubko, Jacek Szade, Katarzyna Balin, Joanna Klimontko, Daniel Lach, Judyta Popiel, Adam Smoliński and Jaroslaw Polanski

Catalysts 2020, 10(5), 513; https://doi.org/10.3390/catal10050513 - 07 May 2020

Cited by 17 | Viewed by 3737

Abstract

In this study, we investigated the catalytic performance of Ru nanoparticles (NPs) supported on Ni-nanowires for the first time. This appears to be a highly efficient catalyst for low-temperature methanation, e.g., ca. 100% conversion and 100% of CH₄ selectivity can be achieved at ca. 179 °C, while the turnover frequency (TOF) value was 2479.2 h⁻¹. At the same time, the onset of a reaction was observed at a temperature as low as 130 °C. The comparison of nano-Pd and nano-Ru supported on Ni-nanowires enabled us to prove that oxidized surface metals are highly important for the high activity of the investigated nano-Ru@nanowired-Ni. Moreover, similar to the microscopic Sabatier rule, which indicates that some optimal reactivity level of a catalyst exists, we showed that Ni-nanowires (a higher specific surface area than a standard metal surface, e.g., in the form of a metal foam, but lower than nano-sized materials) significantly enhances the performance of the Ru-Ni catalytic system. Full article

(This article belongs to the Special Issue Metal or Bimetallic Nanocatalysts for Environmental Engineering Applications)

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Review

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20 pages, 6480 KiB

Open AccessReview

Surface Modification of Catalysts via Atomic Layer Deposition for Pollutants Elimination

by Xiaofeng Wang, Zhe Zhao, Chengcheng Zhang, Qingbo Li and Xinhua Liang

Catalysts 2020, 10(11), 1298; https://doi.org/10.3390/catal10111298 - 10 Nov 2020

Cited by 9 | Viewed by 3646

Abstract

In recent years, atomic layer deposition (ALD) is widely used for surface modification of materials to improve the catalytic performance for removing pollutants, e.g., CO, hydrocarbons, heavy metal ions, and organic pollutants, and much progress has been achieved. In this review, we summarize the recent development of ALD applications in environmental remediation from the perspective of surface modification approaches, including conformal coating, uniform particle deposition, and area-selective deposition. Through the ALD conformal coating, the activity of photocatalysts improved. Uniform particle deposition is used to prepare nanostructured catalysts via ALD for removal of air pollutions and dyes. Area-selective deposition is adopted to cover the specific defects on the surface of materials and synthesize bimetallic catalysts to remove CO and other contaminations. In addition, the design strategy of catalysts and shortcomings of current studies are discussed in each section. At last, this review points out some potential research trends and comes up with a few routes to further improve the performance of catalysts via ALD surface modification and deeper investigate the ALD reaction mechanisms. Full article

(This article belongs to the Special Issue Metal or Bimetallic Nanocatalysts for Environmental Engineering Applications)

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18 pages, 2447 KiB

Open AccessFeature PaperReview

Ru and Ni—Privileged Metal Combination for Environmental Nanocatalysis

by Jaroslaw Polanski, Daniel Lach, Maciej Kapkowski, Piotr Bartczak, Tomasz Siudyga and Adam Smolinski

Catalysts 2020, 10(9), 992; https://doi.org/10.3390/catal10090992 - 01 Sep 2020

Cited by 11 | Viewed by 3334

Abstract

Privileged structures is a term that is used in drug design to indicate a fragment that is popular in the population of drugs or drug candidates that are in the application or investigation phases, respectively. Privileged structures are popular motifs because they generate efficient drugs. Similarly, some elements appear to be more efficient and more popular in catalyst design and development. To indicate this fact, we use here a term privileged metal combination. In particular, Ru-based catalysts have paved a bumpy road in a variety of commercial applications from ammonia synthesis to carbon (di)oxide methanation. Here, we review Ru/Ni combinations in order to specifically find applications in environmental nanocatalysis and more specifically in carbon (di)oxide methanation. Synergy, ensemble and the ligand effect are theoretical foundations that are used to explain the advantages of multicomponent catalysis. The economic effect is another important issue in blending metal combinations. Low temperature and photocatalytic processes can be indicated as new tendencies in carbon (di)oxide methanation. However, due to economics, future industrial developments of this reaction are still questionable. Full article

(This article belongs to the Special Issue Metal or Bimetallic Nanocatalysts for Environmental Engineering Applications)

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