Formation and selected catalytic properties of ruthenium, rhodium, osmium and iridium nanoparticles

Krajczewski, Jan; Ambroziak, Robert; Kudelski, Andrzej

doi:10.1039/d1ra07470a

Cited by 14 publications

(17 citation statements)

References 156 publications

(165 reference statements)

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“…A similar topology was found for the Al 2 O 3 /PZT pellets. Additional evidence of this topology is gained by XPS analysis This aggregate size is higher than that of nanoparticles prepared by using chemical reduction processes, as reported in the literature 42 (see the Supporting Information). We should note that aggregation state of nanoparticles would not significantly affect their catalytic activity, which would be mainly determined by the density of surface-active catalysts sites, regardless of the aggregation state of the nanoparticles.…”

Section: ■ Experimental Sectionsupporting

confidence: 71%

Incorporation of a Metal Catalyst for the Ammonia Synthesis in a Ferroelectric Packed-Bed Plasma Reactor: Does It Really Matter?

Navascués

Garrido-García

Cotrino

et al. 2023

ACS Sustainable Chem. Eng.

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Plasma-catalysis has been proposed as a potential alternative for the synthesis of ammonia. Studies in this area focus on the reaction mechanisms and the apparent synergy existing between processes occurring in the plasma phase and on the surface of the catalytic material. In the present study, we approach this problem using a parallel-plate packed-bed reactor with the gap between the electrodes filled with pellets of lead zirconate titanate (PZT), with this ferroelectric material modified with a coating layer of alumina (i.e., Al2O3/PZT) and the same alumina layer incorporating ruthenium nanoparticles (i.e., Ru-Al2O3/PZT). At ambient temperature, the electrical behavior of the ferroelectric packed-bed reactor differed for these three types of barriers, with the plasma current reaching a maximum when using Ru-Al2O3/PZT pellets. A systematic analysis of the reaction yield and energy efficiency for the ammonia synthesis reaction, at ambient temperature and at 190 °C and various electrical operating conditions, has demonstrated that the yield and the energy efficiency for the ammonia synthesis do not significantly improve when including ruthenium particles, even at temperatures at which an incipient catalytic activity could be inferred. Besides disregarding a net plasma-catalysis effect, reaction results highlight the positive role of the ferroelectric PZT as moderator of the discharge, that of Ru particles as plasma hot points, and that of the Al2O3 coating as a plasma cooling dielectric layer.

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Section: ■ Experimental Sectionsupporting

confidence: 71%

Incorporation of a Metal Catalyst for the Ammonia Synthesis in a Ferroelectric Packed-Bed Plasma Reactor: Does It Really Matter?

Navascués

Garrido-García

Cotrino

et al. 2023

ACS Sustainable Chem. Eng.

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“…Despite such a variety of elements, only a few of them have been investigated for the preparation of 2D colloidal nanoparticles in their metallic form. Apart from the scarcity of the elements of the f-block, other reasons to explain this may include the difficulty of isolating the pure form of some of the metals (e.g., Hf or Zr), as well as the high oxophilicity of many members of the hcp family (e.g., Ti, Re, Gd). − …”

Section: Other Crystal Lattices and Compositionsmentioning

confidence: 99%

Plate-Like Colloidal Metal Nanoparticles

et al. 2023

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The pseudo-two-dimensional (2D) morphology of plate-like metal nanoparticles makes them one of the most anisotropic, mechanistically understood, and tunable structures available. Although well-known for their superior plasmonic properties, recent progress in the 2D growth of various other materials has led to an increasingly diverse family of plate-like metal nanoparticles, giving rise to numerous appealing properties and applications. In this review, we summarize recent progress on the solution-phase growth of colloidal plate-like metal nanoparticles, including plasmonic and other metals, with an emphasis on mechanistic insights for different synthetic strategies, the crystallographic habits of different metals, and the use of nanoplates as scaffolds for the synthesis of other derivative structures. We additionally highlight representative self-assembly techniques and provide a brief overview on the attractive properties and unique versatility benefiting from the 2D morphology. Finally, we share our opinions on the existing challenges and future perspectives for plate-like metal nanomaterials.

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“…With proper synthesis knowledge, these nanoparticles customized from supported and unsupported PGMs make a huge impact as a catalyst in commercial markets, replacing the currently used ones. [ 5 ]…”

Section: R Esultsmentioning

confidence: 99%

Applications of nanomaterials in dentistry: A review

Chokkattu¹,

Neeharika²,

Rameshkrishnan³

2023

JISPCD

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A BSTRACT Aim and Objective: Currently, the major priority in the field of nanotechnology or nanoscience is research and development at the atomic- or molecular-level sciences. Almost every aspects of human health, including pharmaceutical, clinical research and analysis, and supplemental immunological systems, are significantly impacted by it. Diverse dental applications to the realm of nanotechnology, which also reflect developments in material sciences, have given rise to the field of nanodentistry and nanocatalytic drug development, especially in oral nanozyme research and application. This review is aimed to provide readers an in-depth analysis of nanotechnology’s characteristics, varied qualities, and applications toward dentistry. Materials and Methods: A query was carried out in PubMed and Google Scholar databases for the articles published from 2007 to 2022 using the keywords/MESH term nanomaterials, dentistry, nanoenzymes, metals, and antibacterial activity. Data extraction and evidence synthesis have been performed by three researchers individually. Results: A total of 901 articles have been extracted, out of which 108 have been removed due to repetitions and overlapping. After further screening following exclusion and inclusion criteria, 74 papers were considered to be pertinent and that primarily addressed dental nanotechnology were chosen. Further, the data havebeen extracted and interpreted for the review. The results of the review indicated that the development of multifunctional nanozymes has been continuously assessed in relation to oro-dental illnesses to show the significant impact that nanozymes have on oral health. Conclusion: As evidenced by the obtained results, with the advent of ongoing breakthroughs in nanotechnology, dental care could be improved with advanced preventive measures.

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Formation and selected catalytic properties of ruthenium, rhodium, osmium and iridium nanoparticles

Abstract: The synthesis and applications in catalysis of nanoparticles formed from ruthenium, rhodium, osmium and iridium have been reviewed.

Cited by 14 publications

References 156 publications

Incorporation of a Metal Catalyst for the Ammonia Synthesis in a Ferroelectric Packed-Bed Plasma Reactor: Does It Really Matter?

Incorporation of a Metal Catalyst for the Ammonia Synthesis in a Ferroelectric Packed-Bed Plasma Reactor: Does It Really Matter?

Plate-Like Colloidal Metal Nanoparticles

Applications of nanomaterials in dentistry: A review

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