Heterogeneous Catalysis “On Demand”: Mechanically Controlled Catalytic Activity of a Metal Surface

2017 ◽  
Vol 9 (51) ◽  
pp. 44264-44269 ◽  
Author(s):  
Tomasz Mazur ◽  
Slawomir Lach ◽  
Bartosz A. Grzybowski
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalysis ◽  
Metal Surface ◽  
On Demand

scholarly journals Imidazolium functionalized carbon nanotubes for the synthesis of cyclic carbonates: reducing the gap between homogeneous and heterogeneous catalysis

2016 ◽  
Vol 6 (24) ◽  
pp. 8418-8427 ◽  
Author(s):  
M. Buaki-Sogó ◽  
A. Vivian ◽  
L. A. Bivona ◽  
H. García ◽  
M. Gruttadauria ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Activity ◽  
Heterogeneous Catalysis ◽  
Single Walled Carbon Nanotubes ◽  
The Novel ◽  
Cyclic Carbonates ◽  
Functionalized Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Novel Materials ◽  
Walled Carbon Nanotubes

Single walled carbon nanotubes were functionalized with imidazolium based salts and successfully used as catalysts for the conversion of CO2. The novel materials displayed excellent catalytic activity.

scholarly journals Sulfonated Hydrothermal Carbons from Cellulose and Glucose as Catalysts for Glycerol Ketalization

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 804 ◽  
Author(s):  
Fernández ◽  
Fraile ◽  
García-Bordejé ◽  
Pires
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalysis ◽  
Flow Reactor ◽  
Chemical Properties ◽  
Textural Properties ◽  
Catalytic Synthesis ◽  
Physical Chemical ◽  
Treatment Conditions ◽  
First Results ◽  
Work Up

Solketal is one of the most used glycerol-derived solvents. Its production via heterogeneous catalysis is crucial for avoiding important product losses typically found in the aqueous work-up in homogeneous catalysis. In this work, we present a study of the catalytic synthesis of solketal using sulfonated hydrothermal carbons (SHTC). They were prepared from glucose and cellulose resulting in different textural properties depending on the hydrothermal treatment conditions. The sulfonated hydrothermal carbons were also coated on a graphite microfiber felt (SHTC@GF). Thus, up to nine different solids were tested, and their activity was compared with commercial acidic resins. The solids presented very different catalytic activity, which did not correlate with their physical-chemical properties indicating that other aspects likely influence the transport of reactants and products to the catalytic surface. Additionally, the SHTC prepared from cellulose showed better reusability in batch reaction tests. This work also presents the first results for the production of solketal in a flow reactor, which opens the way to the use of SHTC@GF for this kind of reactions.

Quantum and classical dynamics of reactive scattering of H2 from metal surfaces

2016 ◽  
Vol 45 (13) ◽  
pp. 3658-3700 ◽  
Author(s):  
Geert-Jan Kroes ◽  
Cristina Díaz
Keyword(s):  
Heterogeneous Catalysis ◽  
Metal Surface ◽  
Metal Surfaces ◽  
State Of The Art ◽  
Theoretical Models ◽  
Accurate Description ◽  
Reactive Scattering ◽  
Classical Dynamics

State-of-the-art theoretical models allow nowadays an accurate description of H2/metal surface systems and phenomena relative to heterogeneous catalysis. Here we review the most relevant ones investigated during the last 10 years.

scholarly journals Heterogeneous catalysis with encapsulated haem and other synthetic porphyrins: Harnessing the power of porphyrins for oxidation reactions

2018 ◽  
Vol 16 (1) ◽  
pp. 763-789 ◽  
Author(s):  
Nicola A. Dare ◽  
Timothy J. Egan
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalysis ◽  
Heterogeneous Catalysts ◽  
Organic Substrates ◽  
Oxidation Reactions ◽  
Highly Efficient ◽  
Protein Environment

AbstractEncapsulated metalloporphyrins have been widely studied for their use as efficient heterogeneous catalysts, inspired by the known catalytic activity of porphyrins in haemoproteins. The oxidation of organic substrates by haemoproteins is one of the well-known roles of these proteins, in which the haem (ferriprotoporphyrin IX = FePPIX) cofactor is the centre of reactivity. While these porphyrins are highly efficient catalysts in the protein environment, once removed, they quickly lose their reactivity. It is for this reason that they have garnered much interest in the field of heterogeneous catalysis of oxidation reactions. This review details current research in the field, focusing on the application of encapsulated haem, and other synthetic metalloporphyrins, applied to oxidation reactions.

Colloidal Co single-atom catalyst: a facile synthesis strategy and high catalytic activity for hydrogen generation

2020 ◽  
Vol 22 (4) ◽  
pp. 1269-1274 ◽  
Author(s):  
Junkai Wang ◽  
Zhenxia Huang ◽  
Lilin Lu ◽  
Quanli Jia ◽  
Liang Huang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Catalytic Activity ◽  
Hydrogen Generation ◽  
Single Atom ◽  
High Catalytic Activity ◽  
Mixing Process ◽  
Facile Synthesis ◽  
On Demand ◽  
Synthesis Strategy ◽  
Facile Route

A facile route for on-demand hydrogen production via simply controlling the mixing process of a KBH4 solution and an aqueous solution of ISOBAM-104 stabilized Co2+ ions.

scholarly journals Key factor for the anti-Arrhenius low-temperature heterogeneous catalysis induced by H+ migration: H+ coverage over support

2020 ◽  
Vol 56 (23) ◽  
pp. 3365-3368 ◽  
Author(s):  
Kota Murakami ◽  
Yuta Tanaka ◽  
Ryuya Sakai ◽  
Yudai Hisai ◽  
Sasuga Hayashi ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
Low Temperature ◽  
Electric Field ◽  
Catalytic Reaction ◽  
Small Scale ◽  
Heterogeneous Catalytic Reaction ◽  
Heterogeneous Catalytic ◽  
On Demand ◽  
Novel Approach ◽  
Key Factor

Low-temperature heterogeneous catalytic reaction in an electric field is anticipated as a novel approach for on-demand and small-scale catalytic processes.

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