scholarly journals Bimetallic Cooperativity in Proton Reduction with an Amido-Bridged Cobalt Catalyst

2017 ◽  
Vol 23 (39) ◽  
pp. 9272-9279 ◽  
Author(s):  
Kenneth K. Kpogo ◽  
Shivnath Mazumder ◽  
Denan Wang ◽  
H. Bernhard Schlegel ◽  
Adam T. Fiedler ◽  
...  
Keyword(s):  
Cobalt Catalyst ◽  
Proton Reduction

Cobalt complexes of tetradentate, bipyridine-based macrocycles: their structures, properties and photocatalytic proton reduction

2016 ◽  
Vol 45 (4) ◽  
pp. 1737-1745 ◽  
Author(s):  
E. Joliat ◽  
S. Schnidrig ◽  
B. Probst ◽  
C. Bachmann ◽  
B. Spingler ◽  
...  
Keyword(s):  
Cobalt Catalyst ◽  
Cobalt Complexes ◽  
Proton Reduction ◽  
New Type ◽  
Bipyridine Ligand

Photocatalytic proton reduction is demonstrated using a new type of cobalt catalyst with macrocyclic bis-bipyridine ligand frameworks, achieving turnover numbers up to 20 000 H2/Co.

scholarly journals Enhancing H2 evolution performance of an immobilised cobalt catalyst by rational ligand design

2015 ◽  
Vol 6 (5) ◽  
pp. 2727-2736 ◽  
Author(s):  
Janina Willkomm ◽  
Nicoleta M. Muresan ◽  
Erwin Reisner
Keyword(s):  
Cobalt Catalyst ◽  
Ligand Design ◽  
H2 Evolution ◽  
Proton Reduction ◽  
Reduction Activity ◽  
Rational Ligand Design

Rational ligand design was employed to improve the proton reduction activity of an immobilised cobalt diimine–dioxime catalyst.

Frontispiece: Bimetallic Cooperativity in Proton Reduction with an Amido-Bridged Cobalt Catalyst

2017 ◽  
Vol 23 (39) ◽  
Author(s):  
Kenneth K. Kpogo ◽  
Shivnath Mazumder ◽  
Denan Wang ◽  
H. Bernhard Schlegel ◽  
Adam T. Fiedler ◽  
...  
Keyword(s):  
Cobalt Catalyst ◽  
Proton Reduction

An NADH-Inspired Redox Mediator Strategy to Promote Second-Sphere Electron and Proton Transfer for Cooperative Electrochemical CO2 Reduction Catalyzed by Iron Porphyrin

2020 ◽  
Author(s):  
Peter T. Smith ◽  
Sophia Weng ◽  
Christopher Chang
Keyword(s):  
Proton Transfer ◽  
Co2 Reduction ◽  
Iron Porphyrin ◽  
Redox Mediators ◽  
Reservoir Properties ◽  
Proton Reduction ◽  
Electrochemical Co2 Reduction ◽  
Starting Point ◽  
Rate Improvement ◽  
Molecular Catalysts

We present a bioinspired strategy for enhancing electrochemical carbon dioxide reduction catalysis by cooperative use of base-metal molecular catalysts with intermolecular second-sphere redox mediators that facilitate both electron and proton transfer. Functional synthetic mimics of the biological redox cofactor NADH, which are electrochemically stable and are capable of mediating both electron and proton transfer, can enhance the activity of an iron porphyrin catalyst for electrochemical reduction of CO<sub>2</sub> to CO, achieving a 13-fold rate improvement without altering the intrinsic high selectivity of this catalyst platform for CO<sub>2</sub> versus proton reduction. Evaluation of a systematic series of NADH analogs and redox-inactive control additives with varying proton and electron reservoir properties reveals that both electron and proton transfer contribute to the observed catalytic enhancements. This work establishes that second-sphere dual control of electron and proton inventories is a viable design strategy for developing more effective electrocatalysts for CO<sub>2</sub> reduction, providing a starting point for broader applications of this approach to other multi-electron, multi-proton transformations.

Kinetics of oxidation of ammonia on cobalt catalyst I model of the reactor with catalytically active wall

1982 ◽  
Vol 47 (8) ◽  
pp. 2087-2096 ◽  
Author(s):  
Bohumil Bernauer ◽  
Antonín Šimeček ◽  
Jan Vosolsobě
Keyword(s):  
Parabolic Equations ◽  
Cobalt Catalyst ◽  
Nonlinear Parabolic Equations ◽  
Catalytic Reactions ◽  
Temperature Profiles ◽  
Dimensional Model ◽  
Kinetics Of Oxidation ◽  
Nonlinear Parabolic ◽  
Catalytically Active ◽  
Kinetics Of

A two dimensional model of a tabular reactor with the catalytically active wall has been proposed in which several exothermic catalytic reactions take place. The derived dimensionless equations enable evaluation of concentration and temperature profiles on the surface of the active component. The resulting nonlinear parabolic equations have been solved by the method of orthogonal collocations.

scholarly journals A cross-dehydrogenative C(sp3)−H heteroarylation via photo-induced catalytic chlorine radical generation

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Chia-Yu Huang ◽  
Jianbin Li ◽  
Chao-Jun Li
Keyword(s):  
Hydrogen Atom ◽  
Hydrogen Evolution ◽  
Alkyl Radical ◽  
Cobalt Catalyst ◽  
Alkylation Reaction ◽  
Hydrogen Atom Abstraction ◽  
Dehydrogenative Coupling ◽  
Radical Generation ◽  
Limited Scope

AbstractHydrogen atom abstraction (HAT) from C(sp3)–H bonds of naturally abundant alkanes for alkyl radical generation represents a promising yet underexplored strategy in the alkylation reaction designs since involving stoichiometric oxidants, excessive alkane loading, and limited scope are common drawbacks. Here we report a photo-induced and chemical oxidant-free cross-dehydrogenative coupling (CDC) between alkanes and heteroarenes using catalytic chloride and cobalt catalyst. Couplings of strong C(sp3)–H bond-containing substrates and complex heteroarenes, have been achieved with satisfactory yields. This dual catalytic platform features the in situ engendered chlorine radical for alkyl radical generation and exploits the cobaloxime catalyst to enable the hydrogen evolution for catalytic turnover. The practical value of this protocol was demonstrated by the gram-scale synthesis of alkylated heteroarene with merely 3 equiv. alkane loading.

Constructing efficient hcp-Co active sites for Fischer-Tropsch reaction on an activated carbon supported cobalt catalyst via multistep activation processes

Fuel ◽  
2021 ◽  
Vol 292 ◽  
pp. 120244
Author(s):  
Hong Du ◽  
Miao Jiang ◽  
Hejun Zhu ◽  
Chuande Huang ◽  
Ziang Zhao ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Active Sites ◽  
Cobalt Catalyst ◽  
Fischer Tropsch

Highly Efficient Catalytic Two-Electron Two-Proton Reduction of Dioxygen to Hydrogen Peroxide with a Cobalt Corrole Complex

ACS Catalysis ◽  
2021 ◽  
pp. 3073-3083
Author(s):  
Atanu Rana ◽  
Yong-Min Lee ◽  
Xialiang Li ◽  
Rui Cao ◽  
Shunichi Fukuzumi ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Proton Reduction ◽  
Highly Efficient

CO2 Reforming of CH4 on Mesoporous Alumina-Supported Cobalt Catalyst: Optimization of Lanthana Promoter Loading

2021 ◽  
Author(s):  
Ngoc Thang Tran ◽  
P. Senthil Kumar ◽  
Quyet Van Le ◽  
Nguyen Van Cuong ◽  
Pham T. T. Phuong ◽  
...  
Keyword(s):  
Cobalt Catalyst ◽  
Mesoporous Alumina ◽  
Co2 Reforming ◽  
Co2 Reforming Of Ch4
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