Structured catalysts

The HKUST-1 was synthesized through a straightforward methodology, and its structure was confirmed by various characterization employing a range of techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM) with Energy Dispersive X-ray analysis (EDX), and N2 adsorption/desorption.

8p viambani 18-06-2024 3 0   Download

Precious Pt metals deposited on reducible CeO2 oxide have been widely used in exhaust gas treatment. However, the high cost of Pt metals is the main barrier that prevents from applying the Pt metals. Therefore, a lot of efforts have been dedicated to reducing the Pt size as small as possible, aiming at maximizing Pt metal utilization efficiency. The smallest ultimate size that Pt metal can be deposited on CeO2 as single atom structures. Furthermore, the supported single Pt atom catalysts enhance catalytic performance and selectivity compared to Pt cluster or Pt particle counterparts.

6p dianmotminh02 03-05-2024 3 1   Download

The efficient synthesis of 12-substituted-3,4,4a,5,12,12a-hexahydrobenzo[b]acridine-1,6,11(2H)-triones starting from 2-amino-1,4-naphthoquinone, 1,3-cyclohexanedione, and different (hetero)aromatic aldehydes was developed. These reactions were carried out in acetic acid under microwave irradiation in the presence of p-toluenesulfonic acid as catalyst. The structure of the newly synthesized compounds were confirmed employing spectroscopic data as well as elemental analysis. The plausible mechanism of these three-component domino reactions was also described.

7p dianmotminh02 03-05-2024 4 1   Download

A series of chalcone analogues were synthesized using Claisen-Schmidt condensation and assayed for in vitro inhibitory activity against α-glucosidase. The synthesis involved in solvent-free reaction conditions including NaOHcatalyzed grinding or microwave irradiation in the presence of a clay-based catalyst. Hydroxychalcones and 2′-hydroxychalcones were not isolated when using grinding method, while the microwave-assisted, clay-catalyzed synthesis gave these desired products. In addition, flavanones, cyclization products from 2′-hydroxychalcones were formed in both methods.

8p dianmotminh02 03-05-2024 5 1   Download

Ebook "Structure and reactivity of metals in zeolite materials" provides the reader with the most up-to-date and relevant knowledge on the reactivity of metals located in zeolite materials, either in framework or extra-framework positions, and the way it is connected with the nature of the chemical environment provided by the host.

316p tracanhphuonghoa1007 22-04-2024 5 3   Download

Ebook "Reaction pathways and mechanisms in thermocatalytic biomass conversion I: Cellulose structure, depolymerization and conversion by heterogeneous catalysts" mainly focuses on the current understanding of the reaction pathways and mechanisms involved in several important catalytic conversions of cellulose and carbohydrates.

268p tracanhphuonghoa1007 22-04-2024 4 2   Download

Ebook "Controlled synthesis of Pt–Ni bimetallic catalysts and study of their catalytic properties" presents four pioneering studies: (1) syntheses of water-soluble octahedral, truncated octahedral, and cubic Pt–Ni nanocrystals and the study of their structure-activity relationship in model hydrogenation reactions; (2) a strategy for designing a concave Pt–Ni alloy using controllable chemical etching; (3) defect-dominated shape recovery of nanocrystals, which is a new synthesis strategy for trimetallic catalysts; (4) a sophisticated construction of Au islands on Pt−Ni, which is an ideal trim...

119p tudohanhtau1006 29-03-2024 5 1   Download

Ebook "Creation of new metal nanoparticles and their hydrogen-storage and catalytic properties" reports the discovery of metal nanoparticles having new structures that do not exist in bulk state and that exhibit hydrogen storage ability or CO oxidation activity. Research into the reaction of hydrogen with metals has attracted much attention because of potential applications as effective hydrogen storage materials, as permeable films, or as catalysts for hydrogenation.

86p tudohanhtau1006 29-03-2024 5 1   Download

Ebook "Development of novel hydrogen-bond donor catalysts" describes novel, effective hydrogen-bond (HB) donor catalysts based on a known bifunctional tertiary amine-thiourea, a privileged structure, which has been proven to be one of the most widely used organocatalysts. These HB donor catalysts derived from quinazoline and benzothiadiazine were initially synthesized as novel HB donors with their HB-donating abilities being measured by analytical methods.

119p coduathanh1122 27-03-2024 1 1   Download

Ebook "MWW-type titanosilicate: Synthesis, structural modification and catalytic applications to green oxidations" provides a comprehensive review of a new generation of selective oxidation titanosilicate catalysts with the MWW topology (Ti-MWW) based on the research achievements of the past 12 years. It gives an overview of the synthesis, structure modification and catalytic properties of Ti-MWW. Ti-MWW can readily be prepared by means of direct hydrothermal synthesis with crystallization-supporting agents, using dual-structure-directing agents and a dry-gel conversion technique.

131p coduathanh1122 27-03-2024 1 1   Download

Ebook "Handbook of inorganic compounds" is fully revised and updated. New data include optical inorganics, radiation detection inorganics, thermochromic compounds, piezochromic compounds, metal ion coordination complexes, expanded crystallographic and structural data for inorganics, catalysts, superconductors, and luminescent (fluorescent and phosphorescent) inorganics.

572p coduathanh1122 27-03-2024 3 1   Download

The importance of sustainable practices within hospital supply chains has never been more pronounced than in the contemporary healthcare landscape, particularly in the wake of global health challenges. This research paper "Integrating technology in hospital supply chain: Pathway to a sustainable healthcare ecosystem" extends the discourse on sustainable hospital supply chain management (SHSCM) by examining the role of Technology Supply Chain Applications (TSCAs) as a catalyst for Sustainable Societal Advancement (SSA).

10p longtimenosee04 06-03-2024 9 1   Download

Ebook "Modeling and numerical simulations (Modern aspects of electrochemistry, No. 43)" include: mathematical modeling in electrochemistry using finite element and finite difference methods; modeling atomic systems of more than two bodies; modeling impedance of porous electrodes, in order to permit optimal utilization of the active electrode material; modeling of catalyst structure degradation in PEM fuel cells;...

550p manmanthanhla0201 26-02-2024 1 1   Download

Ebook "Fuel cells and hydrogen storage (Structure and bonding, Volume 141)" brings together recent developments in the science and technology of fuel cells. The role of local structural effects and chemical bonding in the electrochemical performance of the new materials is discussed in detail. This work relies heavily on the use of quantitative differential electrochemical mass spectrometry (DEMS) for studying the mechanism of methanol electro-oxidation on platinum and platinum/ruthenium catalysts.

215p manmanthanhla0201 26-02-2024 4 2   Download

Ebook "Olefin upgrading catalysis by nitrogen-based metal complexes I: State-of-the-art and perspectives" highlights key advances that have occurred in the field of olefin conversion in recent years. The role of homogenous transition metal catalysts which contain an imine functionality is emphasized; their potential applications in the processing and upgrade of olefins to a wide variety of commodity products of very high industrial value is also explored.

296p manmanthanhla0201 26-02-2024 1 1   Download

In ebook "High- and low-valent tris-N-heterocyclic carbene iron complexes: A study of molecular and electronic structure" high valent iron nitride and oxo species have been proposed as key intermediates in many bio-catalytic transformations, but until now these species have proven exceedingly challenging to isolate and study. Iron complexes in high oxidation states can thus serve as models for iron-containing enzymes to help us understand biological systems or aid our development of more efficient industrial catalysts.

145p nhanphanguyet 28-01-2024 8 2   Download

In ebook "Catalysis with supported size-selected Pt clusters: Fundamental UHV and applied ambient experiments" Florian Schweinberger investigates the influence of the precise size of catalytically active species on reactivity. In order to do this he carries out studies both in UHV and under ambient conditions for supported, size-selected Platium clusters (8-68 atoms). Schweinberger probed the electronic structure, adsorption properties and reactivity of two olefins on surfaces and Pt clusters in the submonolayer range.

231p nhanphanguyet 28-01-2024 4 2   Download

Ebook "Organometallic reactions and polymerization" provides advanced graduate students and researchers with a structured overview of olefin polymerization. Divided into eight chapters written by international experts, this book covers polymerization using various organotransition-metal catalysts, including early and late transition metal complexes, new trends in olefin oligomerization and related reactions.

307p nhanphanguyet 28-01-2024 5 2   Download

Part 1 book "Essentials of animal physiology" includes content: Cell structure and function; foodstuffs; biological oxidations; enzymes the biological catalysts; animal calorimetry; metabolism; digestion and absorption; water relations and ionic regulations; membrane physiology; temperature regulation; body fluids; circulation of blood.

281p oursky07 23-10-2023 4 2   Download

Part 1 book "Marks' basic medical biochemistry - A clinical approach" includes content: Metabolic fuels and dietary components; the fed or absorptive state; water, acids, bases, and buffersm; structures of the major compounds of the body; amino acids in proteins; structure function relationships in proteins; enzymes as catalysts; regulation of enzymes; relationship between cell biology and biochemistry; cell signaling by chemical messengers.

382p oursky07 24-10-2023 8 2   Download