Role of incorporated transition metal on surface properties and catalytic activity of mesoporous vanadium aluminophosphates in the synthesis of tetrahydroquinolin-5-(1H)-ones

2020 ◽  
Vol 28 ◽  
pp. 100419
Author(s):  
A.V. Vijayasankar ◽  
Santhosh Govindaraju
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Surface Properties

The role of transition metal sulfides in hydrotreatment. III. Acidity, XPS and catalytic activity

1987 ◽  
Vol 31 (1) ◽  
pp. 1-12 ◽  
Author(s):  
M.M. Ramírez de Agudelo ◽  
L. González Reyes ◽  
N. Do Campo
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Metal Sulfides ◽  
Transition Metal Sulfides

scholarly journals Bulk and surface properties of metal carbides: implications for catalysis

2018 ◽  
Vol 20 (10) ◽  
pp. 6905-6916 ◽  
Author(s):  
Matthew G. Quesne ◽  
Alberto Roldan ◽  
Nora H. de Leeuw ◽  
C. Richard A. Catlow
Keyword(s):  
Electronic Structure ◽  
Catalytic Activity ◽  
Transition Metal ◽  
Surface Properties ◽  
Rock Salt ◽  
Metal Carbides ◽  
Transition Metal Carbides ◽  
Formation Energies ◽  
Comprehensive Study

We present a comprehensive study of the bulk and surface properties of transition metal carbides with rock salt structures and discuss their formation energies, electronic structure and potential catalytic activity.

scholarly journals The Role of Structured Carbon in Downsized Transition Metal-Based Electrocatalysts toward a Green Nitrogen Fixation

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1529
Author(s):  
Marcello Ferrara ◽  
Michele Melchionna ◽  
Paolo Fornasiero ◽  
Manuela Bevilacqua
Keyword(s):  
Nitrogen Fixation ◽  
Catalytic Activity ◽  
Heterogeneous Catalysis ◽  
Transition Metal ◽  
Reduction Reaction ◽  
Metal Species ◽  
Nanostructured Carbon ◽  
Nitrogen Reduction ◽  
Recent Trends

Electrocatalytic Nitrogen Reduction Reaction (NRR) to ammonia is one of the most recent trends of research in heterogeneous catalysis for sustainability. The stark challenges posed by the NRR arise from many factors, beyond the strongly unfavored thermodynamics. The design of efficient heterogeneous electrocatalysts must rely on a suitable interplay of different components, so that the majority of research is focusing on development of nanohybrids or nanocomposites that synergistically harness the NRR sequence. Nanostructured carbon is one of the most versatile and powerful conductive supports that can be combined with metal species in an opportune manner, so as to guide the correct proceeding of the reaction and boost the catalytic activity.

Transition metal atoms on different alumina phases: The role of subsurface sites on catalytic activity

2003 ◽  
Vol 67 (11) ◽  
Author(s):  
S. N. Rashkeev ◽  
K. Sohlberg ◽  
M. V. Glazoff ◽  
J. Novak ◽  
S. J. Pennycook ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Metal Atoms ◽  
Transition Metal Atoms

Catalytic Activity of Binary and Triple Systems Based on Redox Inactive Metal Compound, LiSt and Additives of Monodentate Ligands-Modifiers: DMF, HMPA and PhOH, in Selective Ethylbenzene Oxidation with Dioxygen

2016 ◽  
Vol 10 (3) ◽  
pp. 259-270
Author(s):  
Ludmila Matienko ◽  
◽  
Larisa Mosolova ◽  
Vladimir Binyukov ◽  
Gennady Zaikov ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Triple System ◽  
Metal Compound ◽  
Ethylbenzene Oxidation ◽  
Catalytic Systems ◽  
Triple Systems ◽  
Lithium Compound ◽  
Mechanism Of Catalysis ◽  
Monodentate Ligands

Mechanism of catalysis with binary and triple catalytic systems based on redox inactive metal (lithium) compound {LiSt+L2} and {LiSt+L2+PhOH} (L2=DMF or HMPA), in the selective ethylbenzene oxidation by dioxygen into -phenylethyl hydroperoxide is researched. The results are compared with catalysis by nickel-lithium triple system {NiII(acac)2+LiSt+PhOH} in selective ethylbenzene oxidation to PEH. The role of H-bonding in mechanism of catalysis is discussed. The possibility of the stable supramolecular nanostructures formation on the basis of triple systems, {LiSt+L2+PhOH}, due to intermolecular H-bonds, is researched with the AFM method.

The effect of partial exchange of sulphonated macroporous styrene-divinylbenzene copolymers for different ions on their catalytic activity

1981 ◽  
Vol 46 (10) ◽  
pp. 2354-2363 ◽  
Author(s):  
Svatomír Kmošták ◽  
Karel Setínek
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Metal Ions ◽  
Gas Phase ◽  
Transition Metal Ions ◽  
Exchange Capacity ◽  
Total Exchange Capacity ◽  
Styrene Divinylbenzene ◽  
Na Ions ◽  
Type Of Transition

The catalytic activity of sulphonated macroporous styrene-divinylbenzene copolymers, the exchange capacity of which was neutralized from 30, 50 and 80% by Fe(III) ions and from 30% by Na ions and that of Wofatit Y-37 ion exchanger neutralized from 10% of its total exchange capacity by several transition metal ions and by sodium has been studied in isomerisation of cyclohexene and dehydration of 1-propanol in the gas phase at 130 °C. It was demonstrated that in both reactions transition metal ions exhibit additional effect to the expected neutralization of the polymer acid groups. In the case of cyclohexene isomerization, this effect depends on the degree of crosslinking of polymer mass of the catalyst. Such dependence has not been, however, observed in dehydration of 1-propanol. The type of transition metal ions did not exhibit any significant effect on the catalytic activity of the polymer catalysts studied.

scholarly journals Conversion of Methanol on Rutile TiO2 (110) and Tungsten Oxide Clusters: 2. The Role of Defects and Electron Transfer in Bifunctional Oxidic Photocatalysts

2021 ◽  
Author(s):  
Lars Mohrhusen ◽  
Jessica Kräuter ◽  
Katharina Al-Shamery
Keyword(s):  
Electron Transfer ◽  
Transition Metal ◽  
Metal Oxide ◽  
Tungsten Oxide ◽  
Organic Compounds ◽  
Uv Irradiation ◽  
Organic P ◽  
Rutile Tio2 ◽  
Metal Oxide Surfaces

The photochemical conversion of organic compounds on tailored transition metal oxide surfaces by (UV) irradiation has found wide applications ranging from the production of chemicals to the degradation of organic...

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