scholarly journals Site-dependent selectivity in oxidation reactions on single Pt nanoparticles

2020 ◽  
Vol 22 (34) ◽  
pp. 18765-18769
Author(s):  
Shahar Dery ◽  
Suhong Kim ◽  
Daniel Feferman ◽  
Hillel Mehlman ◽  
F. Dean Toste ◽  
...  
Keyword(s):  
Pt Nanoparticles ◽  
Heterocyclic Carbenes ◽  
Oxidation Reactions ◽  
Probe Molecules ◽  
Ir Nanospectroscopy

Site-dependent selectivity in oxidation reactions on Pt nanoparticles was identified by conducting IR nanospectroscopy measurements while using allyl-functionalized N-heterocyclic carbenes (allyl-NHCs) as probe molecules.

Water-soluble platinum nanoparticles stabilized by sulfonated N-heterocyclic carbenes: influence of the synthetic approach

2018 ◽  
Vol 47 (12) ◽  
pp. 4093-4104 ◽  
Author(s):  
Edwin A. Baquero ◽  
Simon Tricard ◽  
Yannick Coppel ◽  
Juan C. Flores ◽  
Bruno Chaudret ◽  
...  
Keyword(s):  
Platinum Nanoparticles ◽  
Pt Nanoparticles ◽  
Heterocyclic Carbenes ◽  
Water Soluble ◽  
Synthetic Approach

On the surface: Pt nanoparticles with NHC ligands at the surface have been prepared in water using different organometallic approaches.

scholarly journals Identifying site-dependent reactivity in oxidation reactions on single Pt particles

2018 ◽  
Vol 9 (31) ◽  
pp. 6523-6531 ◽  
Author(s):  
Shahar Dery ◽  
Suhong Kim ◽  
David Haddad ◽  
Albano Cossaro ◽  
Alberto Verdini ◽  
...  
Keyword(s):  
Oxidation Reactions ◽  
Reaction Conditions ◽  
Surface Sites ◽  
Ir Nanospectroscopy

IR nanospectroscopy measurements revealed the influence of oxidizing reaction conditions on the reactivity of different surface sites on Pt particles.

High spatial resolution mapping of chemically-active self-assembled N-heterocyclic carbenes on Pt nanoparticles

2016 ◽  
Vol 188 ◽  
pp. 345-353 ◽  
Author(s):  
Y. Levratovsky ◽  
E. Gross
Keyword(s):  
Spatial Resolution ◽  
Metallic Nanoparticles ◽  
Active Sites ◽  
High Spatial Resolution ◽  
Chemical Properties ◽  
Pt Nanoparticles ◽  
Functional Materials ◽  
Resolution Mapping ◽  
Self Assembled ◽  
Ir Nanospectroscopy

The properties of many functional materials critically depend on the spatial distribution of surface active sites. In the case of solid catalysts, the geometric and electronic properties of different surface sites will directly impact their catalytic properties. However, the detection of catalytic sites at the single nanoparticle level cannot be easily achieved and most spectroscopic measurements are performed with ensemble-based measurements in which the reactivity is averaged over millions of nanoparticles. It is hereby demonstrated that chemically-functionalized N-heterocyclic carbene molecules can be attached to the surfaces of Pt nanoparticles and utilized as a model system for studying catalytic reactions on single metallic nanoparticles. The formation of a carbene self-assembled layer on the surface of a Pt nanoparticle and its stability under oxidizing conditions were investigated. IR nanospectroscopy measurements detected the chemical properties of surface-anchored molecules on single nanoparticles. A direct correlation was identified between IR nanospectroscopy measurements and macroscopic ATR-IR measurements. These results demonstrate that high spatial resolution mapping of the catalytic reactivity on single nanoparticles can be achieved with this approach.

Synthesis and characterization of Pt nanoparticles with different morphologies in mesoporous silica SBA-15 for methanol oxidation reaction

Nanoscale ◽  
2014 ◽  
Vol 6 (21) ◽  
pp. 12644-12654 ◽  
Author(s):  
C. S. Chen ◽  
Y. T. Lai ◽  
T. C. Chen ◽  
C. H. Chen ◽  
J. F. Lee ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Methanol Oxidation ◽  
Oxidation Reaction ◽  
Pt Nanoparticles ◽  
Synthesis And Characterization ◽  
Methanol Oxidation Reaction ◽  
Oxidation Reactions ◽  
Carboxylic Acid Groups ◽  
Silica Materials

Mesoporous SBA-15 silica materials functionalized with and without carboxylic acid groups were used to effectively control the morphology of Pt crystals, and the materials thus obtained were applied to methanol oxidation reactions.

How Pt nanoparticles affect TiO2-induced gas-phase photocatalytic oxidation reactions

2015 ◽  
Vol 324 ◽  
pp. 119-126 ◽  
Author(s):  
Bindikt D. Fraters ◽  
Rezvaneh Amrollahi ◽  
Guido Mul
Keyword(s):  
Gas Phase ◽  
Photocatalytic Oxidation ◽  
Pt Nanoparticles ◽  
Oxidation Reactions

Mechanism of Oxidation Reactions of Bromine

1958 ◽  
Vol 14 (5_6) ◽  
pp. 357-360
Author(s):  
K. C. Grover ◽  
R. C. Mehrotra
Keyword(s):  
Oxidation Reactions ◽  
Mechanism Of Oxidation

Mechanism of Oxidation Reactions of Bromine

1958 ◽  
Vol 14 (5_6) ◽  
pp. 345-356 ◽  
Author(s):  
K. C. Grover ◽  
R. C. Mehrotra
Keyword(s):  
Oxidation Reactions ◽  
Mechanism Of Oxidation

Effect of Modification Factors of MWCNTs Support on Electrocatalytic Performance of Pt Nanoparticles

2015 ◽  
Vol 30 (9) ◽  
pp. 931 ◽  
Author(s):  
XU Ming-Li ◽  
DUAN Ben ◽  
ZHANG Ying-Jie ◽  
YANG Guo-Tao ◽  
DONG Peng ◽  
...  
Keyword(s):  
Pt Nanoparticles ◽  
Electrocatalytic Performance
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