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Catalytic efficiency
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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
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This article, we present a thorough and straightforward hydrothermal method towards the production of reduced graphene oxide templated MIL-53(Fe) hybrids RGO@MIL-53(Fe). The structural characteristics of created hybrids were identified by using BET, FESEM, powder X-ray diffraction, and FTIR techniques. Methylene blue (MB) dye (a model water pollutant) was used to evaluate H2O2-assisted photo-catalytic efficiency of RGO@MIL-53(Fe).
9p
dianmotminh02
03-05-2024
2
1
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In this work, TiO2-doped carbon aerogel (TiO2/CA) was synthesized from sugarcane bagasse hydrothermal, freezedrying, and carbonization methods. The effects of the calcination temperatures of 400, 500, 600, 700, and 800 oC were also evaluated. The obtained TiO2/CA exhibits an ultralow density (0.021-0.032 g/cm3 ) and porosity of more than 97 %. The asprepared TiO2/CA was applied in photodegradation of methylene blue (MB) with the effects of dose sample and pH were also investigated.
11p
dianmotminh02
03-05-2024
2
1
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Ebook "Selective catalysis for renewable feedstocks and chemicals" is to highlight several recent research efforts to discover and to develop selective, catalytic reactions and processes for the conversion of ligno-cellulosic and plant oil-derived feedstocks to value-added chemicals. The value of catalytic chemical processes lies in their reduced energy consumption and potentially increased efficiency and product selectivity, which minimize environmental and societal impacts.
265p
tudohanhtau1006
29-03-2024
3
1
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Part 2 book "Physical chemistry for chemists and chemical engineers - Multidisciplinary research perspectives" includes content: Fast qualitative inspection of designed experiments by means of the superposing significant interaction rules (SSIR) method; optimum selection of system of a gas cleaning with an economic efficiency estimation; genetic algorithms and their applications in different areas of engineering and science;... and other contents.
179p
muasambanhan09
12-03-2024
2
0
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Ebook "Hydrosilylation: A comprehensive review on recent advances (Advances in silicon science, Volume 01)" is to comprehensively review the advances of hydrosilylation processes since 1990. The survey of the literature published over the last two decades enables the authors to discuss the most recent aspects of hydrosilylation advances (catalytic and synthetic) and to elucidate the reaction mechanism for the given catalyst used and the reaction utilization. New catalytic pathways under optimum conditions necessary for efficient synthesis of organosilicon compounds are presented.
424p
manmanthanhla0201
26-02-2024
2
1
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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
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Ebook "Methane combustion over lanthanum-based perovskite mixed oxides" presents current research into the catalytic combustion of methane using perovskite-type oxides (ABO3). Catalytic combustion has been developed as a method of promoting efficient combustion with minimum pollutant formation as compared to conventional catalytic combustion. Recent theoretical and experimental studies have recommended that noble metals supported on (ABO3) with well-ordered porous networks show promising redox properties.
123p
nhanphanguyet
28-01-2024
8
2
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The findings make it possible to carry out the directed synthesis of catalysts based on the Ce eFeeO system with specific phases, dispersion, and morphological composition for efficient hydrogen oxidation at moderate temperatures.
10p
viberbers
09-08-2023
6
2
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Monoclinic argentite Ag2S-based AgCoOS oxysulfide catalyst with high catalytic reduction performance in the dark with NaBH4 was prepared via a facial method. The co-doping of transition metal cations and anions was employed to effectively adjust the electron transfer property of the catalyst, with O used to modify the energy band structure and Co to provide extra active sites for the electrophilic and nucleophile reactions.
13p
viberbers
09-08-2023
7
3
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Facile fabrication of enzyme immobilized carbon nanospheres (CNS) based catalysts with high electrical conductivity and catalytic efficiency are of decisive importance for their electrocatalysis. A novel, green and highly efficient synthesis route is reported here for the development of an electrode surface with enhanced electrical conductivity and better catalytic activity for the electrochemical synthesis of heliotropin.
11p
viberbers
09-08-2023
7
3
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We report on a two-step catalytic process, where deoiled seed cake as a feed was rapidly depolymerized and converted to a chemical intermediate under mild conditions, and a polymer compound was subsequently synthesized in the presence of an initiator under microwave irradiation.
7p
viberbers
09-08-2023
3
3
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A bifunctional glycoside hydrolase GH78 from the ascomycete Xylaria polymorpha (XpoGH78) with catalytic versatility to both glycosides and esters, may be beneficial for the efficient degradation of plant cell-wall complexes containing both diverse sugar residues and esterified structures to apply in, for example, the production of biofuels from plant feedstock.
10p
vidudley
20-02-2023
2
2
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In this study, olive oil residue (OR) biomass was pyrolyzed in the presence of bulk MgO (B-MgO), nano-MgO (N-MgO), bulk ZnO (B-ZnO)), and nano-ZnO (N- ZnO) metal oxides at different temperatures (400, 600, and 800 ºC). Significant results were obtained in terms of synthesis gas formation and CO2 reduction. The efficiency distribution of the products obtained as a result of the metal oxide-based pyrolysis process and the effects of metal oxides were examined in detail.
15p
lyhuyenthu
31-01-2023
6
2
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Sustainable development with green technology and management is appreciated in the 21st century. Advanced oxidation processes (AOPs) are considered as one of the green ways towards a sustainable future when using advanced materials to enhance the AOPs for complete pollutant treatment.
5p
viericschmid
12-01-2022
7
0
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A very efficient ligand-free method was developed for the transfer hydrogenation of ketones and aldehydes catalyzed by different metal complexes. With this catalytic system, the catalytic performance and catalytic stability of different Ir, Ru, and Pd complexes were more favorable than those of the previously reported systems for transfer hydrogenation. This ligand-free catalytic system showed good stability and excellent activity even with lower catalyst concentrations for the ketones and aldehydes tested.
7p
langthannam
29-12-2021
5
0
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A poly(4-vinylpyridine)-supported Brønsted ionic liquid was easily prepared from its starting materials and used as a novel, highly efficient, and reusable heterogeneous catalytic system for the synthesis of 4,4’-(arylmethylene)bis(3- methyl-1-phenyl-1H-pyrazol-5-ols) from the condensation reaction between aromatic aldehydes and 2 equivalents of 3- methyl-l-phenyl-5-pyrazolone.
9p
langthannam
29-12-2021
7
0
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The synthesized catalyst was characterized by several physico-chemical and spectroscopic methods. This immobilized complex was found to be an efficient heterogeneous catalyst for the oxidation of different sulfides and hydrocarbons using hydrogen peroxide (H2 O2) as an oxidant. The catalyst is readily recovered by simple magnetic decantation and can be recycled several times with no considerable loss of catalytic activity.
16p
langthannam
29-12-2021
15
0
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This polymeric ligand was reacted with PdCl 2 to obtain a polymeric Pd(0) complex. The TEM image of the Pd catalyst showed good dispersion of catalytic sites. The Pd catalyst exhibits excellent activity and stability in copper-free Sonogashira–Hagihara cross-coupling reactions under aerobic conditions. This protocol can be applied efficiently to the coupling reactions of chloro- as well as iodo- and bromo-arenes. The catalyst can be reused several times without any considerable decrease in its activity.
6p
langthannam
29-12-2021
7
0
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In this account the authors’ latest results in C–C coupling catalysis are reviewed. First, an efficient catalytic system for the Kumada–Tamao–Corriu coupling reaction based on NHC-phosphine (NHC = N-heterocyclic carbene) nickel complexes is presented. Then the use of palladium complexes of chiral ferrocenyl NHC-phosphines in the asymmetric Suzuki–Miyaura coupling reaction is reported. High catalytic activities and moderate enantioselectivities (ee up to 46%) were obtained.
13p
langthannam
29-12-2021
9
0
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