3DOM-LaSrCoFeO6−δ as a highly active catalyst for the thermal and photothermal reduction of CO2 with H2O to CH4

2016 ◽  
Vol 4 (34) ◽  
pp. 13155-13165 ◽  
Author(s):  
Minh Ngoc Ha ◽  
Guanzhong Lu ◽  
Zhifu Liu ◽  
Lichao Wang ◽  
Zhe Zhao
Keyword(s):  
Active Catalyst ◽  
Catalytic Performance ◽  
Thermal Reaction ◽  
Reaction Conditions ◽  
Highly Active ◽  
Reduction Of Co2

LSCF and 3DOM-LSCF catalysts can significantly improve the catalytic performance and 100% selectivity for the reduction of CO2 with H2O vapor to CH4 under thermal and photo-thermal reaction conditions.

N,O-ligated Pd(ii) complexes for catalytic alcohol oxidation

2014 ◽  
Vol 4 (8) ◽  
pp. 2526-2534 ◽  
Author(s):  
Laura M. Dornan ◽  
Gráinne M. A. Clendenning ◽  
Mateusz B. Pitak ◽  
Simon J. Coles ◽  
Mark J. Muldoon
Keyword(s):  
Crystal Structure ◽  
Sulfonic Acid ◽  
Active Catalyst ◽  
Alcohol Oxidation ◽  
Secondary Alcohols ◽  
Reaction Conditions ◽  
Highly Active

The (HSA)Pd(OAc)2 complex (where HSA = 8-hydroxyquinoline-2-sulfonic acid) is a highly active catalyst for the oxidation of a range of secondary alcohols in 4–6 hours at a low loading of 0.5 mol%. The crystal structure has been obtained and the influence of reaction conditions on catalyst degradation was also examined.

scholarly journals A rapid and efficient synthetic route to terminal arylacetylenes by tetrabutylammonium hydroxide- and methanol-catalyzed cleavage of 4-aryl-2-methyl-3-butyn-2-ols

2011 ◽  
Vol 7 ◽  
pp. 426-431 ◽  
Author(s):  
Jie Li ◽  
Pengcheng Huang
Keyword(s):  
Reaction Time ◽  
Active Catalyst ◽  
Catalyst System ◽  
Synthetic Route ◽  
Reaction Conditions ◽  
Tetrabutylammonium Hydroxide ◽  
Highly Active ◽  
Novel Catalyst ◽  
Usual Reaction

Tetrabutylammonium hydroxide with methanol as an additive was found to be a highly active catalyst for the cleavage of 4-aryl-2-methyl-3-butyn-2-ols. The reaction was performed at 55–75 °C and gave terminal arylacetylenes in good to excellent yields within several minutes. Compared with the usual reaction conditions (normally >110 °C, several hours), this novel catalyst system can dramatically decrease the reaction time under much milder conditions.

scholarly journals Interface-Active Metal Organic Frameworks for Knoevenagel Condensations in Water

Catalysts ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 315 ◽  
Author(s):  
Yanmei Zhang ◽  
Xiang Zhang ◽  
Rixia Bai ◽  
Xiyan Hou ◽  
Jun Li
Keyword(s):  
Knoevenagel Condensation ◽  
Active Catalyst ◽  
Metal Organic Framework ◽  
Catalytic Performance ◽  
Pickering Emulsions ◽  
Reaction Conditions ◽  
Solid Catalysts ◽  
Active Metal ◽  
Metal Organic ◽  
Oil Water

It is desirable but challenging to locate solid catalysts at the oil-water interface to stabilize “Pickering emulsions”, which is one of the promising ways to develop efficient green chemical processes. Herein, water-stable metal organic framework ZIF-8 without any chemical modification was demonstrated to be an interface-active catalyst for Knoevenagel condensation in a biphasic system. Pickering emulsion formed under the reaction conditions due to its amphiphilic property, which was beneficial to the mass transfer and led to high catalytic performance. Moreover, it can be repeatedly applied for Knoevenagel condensation for at least six successive cycles without losing its catalytic activity and framework integrity.

scholarly journals Layered Zn2[Co(CN)6](CH3COO) double metal cyanide: a two-dimensional DMC phase with excellent catalytic performance

2019 ◽  
Vol 10 (18) ◽  
pp. 4868-4875 ◽  
Author(s):  
Carlos Marquez ◽  
Arkadiy Simonov ◽  
Michael T. Wharmby ◽  
Cédric Van Goethem ◽  
Ivo Vankelecom ◽  
...  
Keyword(s):  
Active Catalyst ◽  
Catalytic Performance ◽  
Two Dimensional ◽  
Metal Cyanide ◽  
Highly Active ◽  
Excellent Catalytic Performance

A new, layered double metal cyanide phase proved to be a reusable, stable and highly active catalyst in two important DMC applications.

Highly active catalyst for CO2 methanation derived from a metal organic framework template

2017 ◽  
Vol 5 (25) ◽  
pp. 12990-12997 ◽  
Author(s):  
R. Lippi ◽  
S. C. Howard ◽  
H. Barron ◽  
C. D. Easton ◽  
I. C. Madsen ◽  
...  
Keyword(s):  
Active Catalyst ◽  
Metal Organic Framework ◽  
Reaction Conditions ◽  
Co2 Methanation ◽  
Highly Active ◽  
Metal Organic ◽  
Organic Framework

MOF-derived nanocatalysts activated under reaction conditions display remarkable activity when compared to several controls.

Urea-Catalyzed Functionalization of Unactivated C–H Bonds

2020 ◽  
Author(s):  
Alex L. Bagdasarian ◽  
Stasik Popov ◽  
Benjamin Wigman ◽  
Wenjing Wei ◽  
woojin lee ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Organic Synthesis ◽  
High Energy ◽  
Acid Catalysts ◽  
Potential Utility ◽  
New Paradigm ◽  
Lewis Acid Catalysts ◽  
Reaction Conditions ◽  
Highly Active ◽  
Acidic Nature

Herein we report the 3,5bistrifluoromethylphenyl urea-catalyzed functionalization of unactivated C–H bonds. In this system, the urea catalyst mediates the formation of high-energy vinyl carbocations that undergo facile C–H insertion and Friedel–Crafts reactions. We introduce a new paradigm for these privileged scaffolds where the combination of hydrogen bonding motifs and strong bases affords highly active Lewis acid catalysts capable of ionizing strong C–O bonds. Despite the highly Lewis acidic nature of these catalysts that enables triflate abstraction from sp<sup>2</sup> carbons, these newly found reaction conditions allow for the formation of heterocycles and tolerate highly Lewis basic heteroaromatic substrates. This strategy showcases the potential utility of dicoordinated vinyl carbocations in organic synthesis.<br>

Urea-Catalyzed Functionalization of Unactivated C–H Bonds

2020 ◽  
Author(s):  
Alex L. Bagdasarian ◽  
Stasik Popov ◽  
Benjamin Wigman ◽  
Wenjing Wei ◽  
woojin lee ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Organic Synthesis ◽  
High Energy ◽  
Acid Catalysts ◽  
Potential Utility ◽  
New Paradigm ◽  
Lewis Acid Catalysts ◽  
Reaction Conditions ◽  
Highly Active ◽  
Acidic Nature

Herein we report the 3,5bistrifluoromethylphenyl urea-catalyzed functionalization of unactivated C–H bonds. In this system, the urea catalyst mediates the formation of high-energy vinyl carbocations that undergo facile C–H insertion and Friedel–Crafts reactions. We introduce a new paradigm for these privileged scaffolds where the combination of hydrogen bonding motifs and strong bases affords highly active Lewis acid catalysts capable of ionizing strong C–O bonds. Despite the highly Lewis acidic nature of these catalysts that enables triflate abstraction from sp<sup>2</sup> carbons, these newly found reaction conditions allow for the formation of heterocycles and tolerate highly Lewis basic heteroaromatic substrates. This strategy showcases the potential utility of dicoordinated vinyl carbocations in organic synthesis.<br>

Chemical reduction of chlorpyrifos driven by flavin mononucleotide functionalized titanium (IV) dioxide

2020 ◽  
Vol 5 (11) ◽  
Author(s):  
Stephanie Santos Díaz ◽  
Hazim Al-Zubaidi ◽  
Amir C. Ross-Obare ◽  
Sherine O. Obare
Keyword(s):  
Functional Groups ◽  
Organic Contaminants ◽  
Chemical Reduction ◽  
Flavin Mononucleotide ◽  
Reaction Conditions ◽  
Organophosphate Compounds ◽  
Biological Molecule ◽  
Highly Active ◽  
New Directions ◽  
Detrimental Impact

AbstractFor many decades, organohalide and organophosphate compounds have shown significant detrimental impact on the environment. Consequently, strategies for their remediation continue to be an area of emerging need. The reduction of the chlorpyrifos pesticide, a molecule that bears both organohalide and organophosphate functional groups, is an important area of investigation due to it toxic nature. In this report, we demonstrate the effectiveness of the biological molecule, flavin mononucleotide (FMN) toward chemically reducing chlorpyrifos. The FMN was found to be highly active when anchored to nanocrystalline TiO2 surfaces. The results show new directions toward the remediation of organic contaminants under mild reaction conditions.

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.

Co3O4-CuCoO2 hybrid nanoplates as a low-cost and highly active catalyst for producing hydrogen from ammonia borane

2021 ◽  
Author(s):  
Yufa Feng ◽  
Jinyun Liao ◽  
Xiaodong Chen ◽  
Qingyu Liao ◽  
Huize Wang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Active Catalyst ◽  
Low Cost ◽  
Ammonia Borane ◽  
Catalytic Materials ◽  
Highly Active ◽  
Promising Strategy

Developing low-cost and highly active hydrolysis catalytic materials for the dehydrogenation of hydrogen-rich chemicals is a promising strategy to store and easily release hydrogen for fuel cell applications. In this...

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