Time Resolved in situ DXAFS Revealing Highly Active Species of PdO Nanoparticle Catalyst for CH4 Oxidation

ChemCatChem ◽  
2018 ◽  
Vol 10 (16) ◽  
pp. 3384-3387 ◽  
Author(s):  
Yuji Mahara ◽  
Kazumasa Murata ◽  
Kakuya Ueda ◽  
Junya Ohyama ◽  
Kazuo Kato ◽  
...  
Keyword(s):  
Active Species ◽  
Ch4 Oxidation ◽  
Time Resolved ◽  
Highly Active ◽  
Nanoparticle Catalyst

scholarly journals Time Resolved in situ DXAFS Revealing Highly Active Species of PdO Nanoparticle Catalyst for CH4 Oxidation

ChemCatChem ◽  
2018 ◽  
Vol 10 (16) ◽  
pp. 3353-3353
Author(s):  
Yuji Mahara ◽  
Kazumasa Murata ◽  
Kakuya Ueda ◽  
Junya Ohyama ◽  
Kazuo Kato ◽  
...  
Keyword(s):  
Active Species ◽  
Ch4 Oxidation ◽  
Time Resolved ◽  
Highly Active ◽  
Nanoparticle Catalyst

scholarly journals Front Cover: Time Resolved in situ DXAFS Revealing Highly Active Species of PdO Nanoparticle Catalyst for CH4 Oxidation (ChemCatChem 16/2018)

ChemCatChem ◽  
2018 ◽  
Vol 10 (16) ◽  
pp. 3351-3351
Author(s):  
Yuji Mahara ◽  
Kazumasa Murata ◽  
Kakuya Ueda ◽  
Junya Ohyama ◽  
Kazuo Kato ◽  
...  
Keyword(s):  
Active Species ◽  
Ch4 Oxidation ◽  
Cover Time ◽  
Time Resolved ◽  
Front Cover ◽  
Highly Active ◽  
Nanoparticle Catalyst

Hydroxyapatite-nanosphere supported ruthenium(0) nanoparticle catalyst for hydrogen generation from ammonia-borane solution: kinetic studies for nanoparticle formation and hydrogen evolution

RSC Advances ◽  
2014 ◽  
Vol 4 (55) ◽  
pp. 28947-28955 ◽  
Author(s):  
Halil Durak ◽  
Mehmet Gulcan ◽  
Mehmet Zahmakiran ◽  
Saim Ozkar ◽  
Murat Kaya
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Generation ◽  
Active Catalyst ◽  
Kinetic Studies ◽  
Ammonia Borane ◽  
Highly Active ◽  
Solution Kinetic ◽  
Hydrolysis Of ◽  
Nanoparticle Catalyst

Nanohydroxyapatite-supported ruthenium(0) nanoparticles formed in situ during the hydrolysis of AB have been found to be a highly active catalyst in the generation of hydrogen from aqueous AB solution.

Heptamolybdate: a highly active sulfide oxygenation catalyst

2018 ◽  
Vol 47 (34) ◽  
pp. 11882-11887 ◽  
Author(s):  
Ashlin G. Porter ◽  
Hanfeng Hu ◽  
Xuemei Liu ◽  
Adharsh Raghavan ◽  
Sarju Adhikari ◽  
...  
Keyword(s):  
Active Species ◽  
Esi Ms ◽  
Highly Active ◽  
Ms Analysis

[Mo2O11]2− identified as the active species in H2O2 oxygenation of sulfides catalyzed by heptamolybdate using in situ nano-ESI MS analysis.

scholarly journals Hierarchical heterostructures of Bi2MoO6 microflowers decorated with Ag2CO3 nanoparticles for efficient visible-light-driven photocatalytic removal of toxic pollutants

2018 ◽  
Vol 9 ◽  
pp. 2297-2305 ◽  
Author(s):  
Shijie Li ◽  
Wei Jiang ◽  
Shiwei Hu ◽  
Yu Liu ◽  
Yanping Liu ◽  
...  
Keyword(s):  
Visible Light ◽  
Active Species ◽  
Band Alignment ◽  
Chemical Compositions ◽  
Toxic Pollutants ◽  
Highly Active ◽  
Photocatalytic Removal ◽  
Visible Light Driven ◽  
Improved Performance

Developing highly active and durable visible-light-driven photocatalysts for the degradation of toxic pollutants is of vital significance. Herein, Ag2CO3 nanoparticles were in situ formed on Bi2MoO6 microflowers to produce Ag2CO3/Bi2MoO6 heterostructures via a facile procedure. The morphologies, phases, chemical compositions, and optical properties of Ag2CO3/Bi2MoO6 were examined by multiple characterization techniques. The Ag2CO3/Bi2MoO6 heterostructures exhibited substantially improved performance in the removal of industrial dyes (rhodamine B (RhB), methyl orange (MO), and methyl blue (MB)), and the antibiotic tetracycline hydrochloride (TC), compared with bare Bi2MoO6 and Ag2CO3 under visible-light irradiation. The enhancement of activity was attributed to the high charge-separation capacity, which results from the matched band alignment of the two components. The cycling experiments showed a good durability of Ag2CO3/Bi2MoO6. Holes were found to be the dominant active species accounting for the pollutant degradation. This compound is a promising candidate for wastewater treatment.

Invasive species in the flora of Ukraine. I. The group of highly active species

Geo&Bio ◽  
2019 ◽  
Vol 2019 (17) ◽  
pp. 116-135 ◽  
Author(s):  
Vira V. Protopopova ◽  
◽  
Myroslav Shevera
Keyword(s):  
Invasive Species ◽  
Active Species ◽  
Highly Active

Exciton dynamics in thick GaN MOVPE epilayers deposited on sapphire.

1997 ◽  
Vol 2 ◽  
Author(s):  
J. Allègre ◽  
P. Lefebvre ◽  
J. Camassel ◽  
B. Beaumont ◽  
Pierre Gibart
Keyword(s):  
Layer Thickness ◽  
Buffer Layers ◽  
Rate Equations ◽  
Time Resolved ◽  
Versus Layer ◽  
Level Model ◽  
Shallow Impurities ◽  
Aln Buffer ◽  
Time Resolved Photoluminescence

Time-resolved photoluminescence spectra have been recorded on three GaN epitaxial layers of thickness 2.5 μm, 7 μm and 16 μm, at various temperatures ranging from 8K to 300K. The layers were deposited by MOVPE on (0001) sapphire substrates with standard AlN buffer layers. To achieve good homogeneities, the growth was in-situ monitored by laser reflectometry. All GaN layers showed sharp excitonic peaks in cw PL and three excitonic contributions were seen by reflectivity. The recombination dynamics of excitons depends strongly upon the layer thickness. For the thinnest layer, exponential decays with τ ~ 35 ps have been measured for both XA and XB free excitons. For the thickest layer, the decay becomes biexponential with τ1 ~ 80 ps and τ2 ~ 250 ps. These values are preserved up to room temperature. By solving coupled rate equations in a four-level model, this evolution is interpreted in terms of the reduction of density of both shallow impurities and deep traps, versus layer thickness, roughly following a L−1 law.

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