Symmetry-Avoided Crossings and their Role in the Catalytic Activity of Transition Metals

1992 ◽  
pp. 61-83
Author(s):  
Octavio Novaro
Keyword(s):  
Catalytic Activity ◽  
Transition Metals ◽  
Avoided Crossings

Strategies of alloying effect for regulating Pt-based H2-SCR catalytic activity

2018 ◽  
Vol 54 (68) ◽  
pp. 9502-9505 ◽  
Author(s):  
Wei Sun ◽  
Zhiqiang Wang ◽  
Qian Wang ◽  
Waqas Qamar Zaman ◽  
Limei Cao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Transition Metals ◽  
No Reduction ◽  
Compressive Strain ◽  
Reduction Reaction ◽  
Alloying Effect

Compressive strain is induced in Pt crystals by alloying with smaller-sized 3d transition metals, which enhances the H2–NO reduction reaction activity by decreasing the energy required for breaking the N–O bond.

Single-atom transition metals supported on black phosphorene for electrochemical nitrogen reduction

Nanoscale ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 4903-4908 ◽  
Author(s):  
Kang Liu ◽  
Junwei Fu ◽  
Li Zhu ◽  
Xiaodong Zhang ◽  
Hongmei Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Transition Metals ◽  
Reduction Reaction ◽  
Single Atom ◽  
High Catalytic Activity ◽  
Nitrogen Reduction ◽  
Mild Conditions ◽  
Black Phosphorene

Electrochemical nitrogen reduction reaction (NRR) is a promising route to produce ammonia under mild conditions. Single-atom W supported on BP was screened as a promising electrocatalyst with high catalytic activity, stability, and selectively for NRR.

Effects of Substituted Transition Metals (Me:Cr3+, Mn3+, Fe3+ and Mo) on the Fe2+/Modified Silica in the Oxidative Degradation of Reactive Black 5

2015 ◽  
Vol 802 ◽  
pp. 531-536 ◽  
Author(s):  
Norhaslinda Nasuha ◽  
B.H. Hameed
Keyword(s):  
Catalytic Activity ◽  
Transition Metals ◽  
Hydroxyl Radicals ◽  
High Stability ◽  
Oxidative Degradation ◽  
Catalytic Performance ◽  
Reactive Black 5 ◽  
Modified Silica

The Fe2+/modified silica catalysts have been substituted with four types of transition metals such as Fe3+, Cr3+, Mn3+ and Mo. The catalytic activity of these catalysts has been tested for the oxidative degradation of Reactive Black 5 (RB5) at 30°C and pH 4.5. The substituted Fe2+/modified silica with Fe3+ (Fe2+:Fe3+/ m-SiO2) exhibited the highest catalytic performance compared to others transition metals by degrading the RB5 nearly to 95%. This catalyst possessed on high stability by maintaining its performance during the three successive cycles of reaction. These findings can be ascribed to the plausible enhancement in the formation of hydroxyl radicals (HO●) due to the effective redox between Fe2+ and Fe3+

Transition metals as dopants on nickel borides: Their catalytic activity effect on hydrogenation reactions

2008 ◽  
Vol 133-135 ◽  
pp. 49-55 ◽  
Author(s):  
Delicia Acosta ◽  
Norma Ramírez ◽  
Eleonora Erdmann ◽  
Hugo Destéfanis ◽  
Elio Gonzo
Keyword(s):  
Catalytic Activity ◽  
Transition Metals ◽  
Activity Effect ◽  
Hydrogenation Reactions

Catalytic activity of transition metals in hydrogenolysis of ethane calculated by the simplex method

1981 ◽  
Vol 46 (1) ◽  
pp. 52-57 ◽  
Author(s):  
Karel Kuchynka ◽  
Jiří Fusek ◽  
Oldřich Štrouf
Keyword(s):  
Heat Capacity ◽  
Catalytic Activity ◽  
Transition Metals ◽  
Simplex Method ◽  
Molar Heat Capacity ◽  
Atomic Radius ◽  
Chemical Significance ◽  
Physico Chemical ◽  
Physical Importance ◽  
First Ionization Potential

The catalytic activity of transition metals in hydrogenolysis of ethane was approximated by a polynomial of second order with variables of basic physical importance, viz., molar heat capacity, covalent atomic radius of the metal, heat of melting, and first ionization potential of the metal atom. The physico-chemical significance of the correlation of these variables with the catalytic activity of transition metals is discussed.

scholarly journals Catalysis Mediated by 2D Black Phosphorus Either Pristine or Decorated with Transition Metals Species

Surfaces ◽  
2020 ◽  
Vol 3 (2) ◽  
pp. 132-167
Author(s):  
Matteo Vanni ◽  
Maria Caporali ◽  
Manuel Serrano-Ruiz ◽  
Maurizio Peruzzini
Keyword(s):  
Catalytic Activity ◽  
Transition Metals ◽  
Visible Light Irradiation ◽  
2D Materials ◽  
Chemical Processes ◽  
Great Promise ◽  
The Novel ◽  
Two Dimensional ◽  
Basic Character ◽  
Selection Of

Among the novel class of mono-elemental two-dimensional (2D) materials, termed Xenes, phosphorene is emerging as a great promise for its peculiar chemical and physical properties. This review collects a selection of the recent breakthroughs that are related to the application of phosphorene in catalysis and electrocatalysis. Noteworthy, thanks to its intrinsic Lewis basic character, pristine phosphorene turned out to be more efficient and more selective than other non-metal catalysts, in chemical processes as the electroreduction of nitrogen to ammonia or the alkylation of nucleophiles with esters. Once functionalized with transition metals nanoparticles (Co, Ni, Pd, Pt, Ag, Au), its catalytic activity has been evaluated in several processes, mainly hydrogen and oxygen evolution reactions. Under visible light irradiation, it has shown a great improvement of the activity, demonstrating high potential as a photocatalyst.

scholarly journals Trends in the Catalytic Activity of Hydrogen Evolution during CO2 Electroreduction on Transition Metals

ACS Catalysis ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 3035-3040 ◽  
Author(s):  
Etosha R. Cave ◽  
Chuan Shi ◽  
Kendra P. Kuhl ◽  
Toru Hatsukade ◽  
David N. Abram ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Transition Metals ◽  
Hydrogen Evolution ◽  
Co2 Electroreduction
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