| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Harada, Takashi
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (5/5 displayed)
- 2024Quantitative Analysis and Manipulation of Alkali Metal Cations at the Cathode Surface in Membrane Electrode Assembly Electrolyzers for CO<sub>2</sub> Reduction Reactionscitations
- 2009Morphological control of carbon carrier in Pt-carbon nanocomposites derived from photocatalytic reactions on titanium(IV) oxide powderscitations
- 2009Origin of the high activity of porous carbon-coated platinum nanoparticles for aerobic oxidation of alcoholscitations
- 2008Photocatalytic route for synthesis of hollow porous carbon/Pt nanocomposites with controllable density and porositycitations
- 2008Rhodium nanoparticle encapsulated in a porous carbon shell as an active heterogeneous catalyst for aromatic hydrogenationcitations
Places of action
| Organizations | Location | People |
|---|
article
Origin of the high activity of porous carbon-coated platinum nanoparticles for aerobic oxidation of alcohols
Abstract
In an attempt to clarify the origin of the high activity and durability for aerobic oxidation of alcohols over a platinum (Pt)-carbon composite, i.e., Pt nanoparticles embedded in microporous carbon (<em>n</em>Pt@<em>h</em>C), the catalytic reaction mechanism and microstructure of Pt nanoparticles were investigated in detail. By means of kinetic analyses, catalytic oxidation on <em>nPt@hC</em> was found to proceed through the formation of Pt-alcoholates, the <em>β</em>-hydride elimination to form Pt-hydride species (Pt-H), and oxidation of Pt-H with molecular oxygen. It was also revealed that the <em>β</em>-hydride elimination step was a rate-determining step in this reaction. These findings and results of structural studies indicate that the achievement of high catalytic activity on <em>n</em>Pt@<em>h</em>C is due to stabilization of its transition state of a positively charged carbocationic component by the electronrich carbon matrix surrounding Pt nanoparticles, leading to lowering activation energy. Moreover, detailed investigation of the surface characteristics of Pt nanoparticles in <em>n</em>Pt@<em>h</em>C after catalytic reactions by using various analytical methods revealed that the durability of <em>n</em>Pt@<em>h</em>C for aerobic oxidation of alcohols is due to the suppression of aggregation of Pt nanoparticles and prevention of chemical poisoning of Pt surfaces.