Highly-active Platinum Nanoparticles-encapsulated Alumina-doped Resorcinol-Formaldehyde Carbon Composites for Asymmetric Hydrogenation

2021 ◽  
Author(s):  
Wei Yao ◽  
Na Zhang ◽  
Ren-Jie Xiong ◽  
Ranjith Kumar Kankala ◽  
Yongjun Liu ◽  
...  
Keyword(s):  
Platinum Nanoparticles ◽  
Asymmetric Hydrogenation ◽  
Pt Nanoparticles ◽  
Carbon Composites ◽  
Resorcinol Formaldehyde ◽  
Highly Active ◽  
One Step ◽  
New Type

Herein, a new type of highly-active platinum (Pt) nanoparticles encapsulated alumina-doped resorcinol-formaldehyde carbon composites (Al@RFC) is fabricated based on resorcinol-formaldehyde (RF) resin and aluminum acetylacetonate using a one-step carbonization approach...

The Preparation of Platinum Nanoparticles on Titanium Using Chemical Reductive Growth Procedures

2012 ◽  
Vol 490-495 ◽  
pp. 3811-3815
Author(s):  
Li Guo ◽  
Jian Qiang Hu ◽  
Hu Zhang ◽  
Shi Zhao Yang
Keyword(s):  
Ascorbic Acid ◽  
Electron Microscope ◽  
Platinum Nanoparticles ◽  
Pt Nanoparticles ◽  
Resolution Electron ◽  
One Step ◽  
New Type ◽  
High Resolution Electron Microscope ◽  
The One ◽  
Fcc Structure

The synthesis of platinum nanoparticles by reduction of H2PtCl6 with ascorbic acid has been studied. By high-resolution electron microscope and XRD analyses, the resultant nanoparticles have been found to be pure platinum of fcc structure. Their sizes were observed to increase with the increases chemical reductive with 24h. Then, platinum nanoparticles directly attached to Ti plates(Pt nanoparticles/Ti) were successfully fabricated. In this method, platinum nanoparticles could be grown on the Ti surface via the one-step immersion into the growth solution containing PtCl62- and ascorbic acid. The attached and grown platinum nanoparticles were spherical having an agglomerated nanostructure composed of small nanoclusters. The present Pt nanoparticles/Ti may be promising for a new type of electrode material.

Pt nanoparticles immobilized in mesostructured silica: a non-leaching catalyst for 1-octene hydrosilylation

2017 ◽  
Vol 53 (20) ◽  
pp. 2962-2965 ◽  
Author(s):  
Thomas Galeandro-Diamant ◽  
Reine Sayah ◽  
Marie-Line Zanota ◽  
Sébastien Marrot ◽  
Laurent Veyre ◽  
...  
Keyword(s):  
Platinum Nanoparticles ◽  
Pt Nanoparticles ◽  
Mesostructured Silica ◽  
Highly Active

A catalyst containing platinum nanoparticles embedded into the walls of a mesostructured silica framework is highly active in alkene hydrosilylation and does not lead to Pt leaching.

scholarly journals Electron donation of non-oxide supports boosts O2 activation on nano-platinum catalysts

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tao Gan ◽  
Jingxiu Yang ◽  
David Morris ◽  
Xuefeng Chu ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Pt Nanoparticles ◽  
Catalytic Performance ◽  
Nitrogen Vacancy ◽  
Innovative Strategy ◽  
Oxide Supports ◽  
Heterogeneous Catalytic ◽  
Highly Active ◽  
Electron Sink ◽  
Nitrogen Vacancies

AbstractActivation of O2 is a critical step in heterogeneous catalytic oxidation. Here, the concept of increased electron donors induced by nitrogen vacancy is adopted to propose an efficient strategy to develop highly active and stable catalysts for molecular O2 activation. Carbon nitride with nitrogen vacancies is prepared to serve as a support as well as electron sink to construct a synergistic catalyst with Pt nanoparticles. Extensive characterizations combined with the first-principles calculations reveal that nitrogen vacancies with excess electrons could effectively stabilize metallic Pt nanoparticles by strong p-d coupling. The Pt atoms and the dangling carbon atoms surround the vacancy can synergistically donate electrons to the antibonding orbital of the adsorbed O2. This synergistic catalyst shows great enhancement of catalytic performance and durability in toluene oxidation. The introduction of electron-rich non-oxide substrate is an innovative strategy to develop active Pt-based oxidation catalysts, which could be conceivably extended to a variety of metal-based catalysts for catalytic oxidation.

A Powerful One‐Step Puffing Carbonization Method for Construction of Versatile Carbon Composites with High‐Efficiency Energy Storage

2021 ◽  
pp. 2102796
Author(s):  
Shenghui Shen ◽  
Lei Huang ◽  
Xili Tong ◽  
Rongfan Zhou ◽  
Yu Zhong ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Efficiency ◽  
Carbon Composites ◽  
One Step

Platinum nanoparticles partially-embedded into carbon sphere surfaces: a low metal-loading anode catalyst with superior performance for direct methanol fuel cells

2017 ◽  
Vol 5 (37) ◽  
pp. 19857-19865 ◽  
Author(s):  
Kui Li ◽  
Zhao Jin ◽  
Junjie Ge ◽  
Changpeng Liu ◽  
Wei Xing
Keyword(s):  
Fuel Cells ◽  
Platinum Nanoparticles ◽  
Direct Methanol Fuel Cells ◽  
Pt Nanoparticles ◽  
Superior Performance ◽  
Carbon Sphere ◽  
Carbon Spheres ◽  
Anode Catalyst ◽  
Direct Methanol ◽  
Methanol Fuel Cells

A robust architecture, consisting of Pt nanoparticles partially-embedded in carbon spheres with low loading, brings about outstanding electrocatalytic performance in DMFCs.

scholarly journals Enhanced electrocatalytic performance of platinum nanoparticles on thiolated polyaniline-multiwalled carbon nanotubes for methanol oxidation

RSC Advances ◽  
2018 ◽  
Vol 8 (59) ◽  
pp. 33742-33747 ◽  
Author(s):  
Zhaohong Su ◽  
Chaorong Li ◽  
Yongbing Cheng ◽  
Qingwen Gui ◽  
Yuanfu Xiong ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Methanol Oxidation ◽  
Platinum Nanoparticles ◽  
Electrocatalytic Oxidation ◽  
Pt Nanoparticles ◽  
Acidic Media ◽  
Multiwalled Carbon ◽  
Oxidation Of Methanol ◽  
Electrocatalytic Performance

Pt nanoparticles (PtNPs) well-dispersed on thiolated polyaniline (TPANI)-multiwalled carbon nanotubes (MWCNTs) were prepared for enhanced electrocatalytic oxidation of methanol in acidic media.

scholarly journals Enantioselective Diels–Alder reaction of anthracene by chiral tritylium catalysis

2019 ◽  
Vol 15 ◽  
pp. 1304-1312 ◽  
Author(s):  
Qichao Zhang ◽  
Jian Lv ◽  
Sanzhong Luo
Keyword(s):  
Lewis Acid ◽  
Acid Catalyst ◽  
Alder Reaction ◽  
Ion Pair ◽  
Diels Alder ◽  
Highly Active ◽  
Diels Alder Reaction ◽  
New Type ◽  
Lewis Acid Catalyst ◽  
Trityl Cation

The combination of the trityl cation and a chiral weakly coordinating Fe(III)-based bisphosphate anion was used to develop a new type of a highly active carbocation Lewis acid catalyst. The stereocontrol potential of the chiral tritylium ion pair was demonstrated by its application in an enantioselective Diels–Alder reaction of anthracene.

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