Calixarene-Based Oxovanadium Complexes as Molecular Models for Catalytically Active Surface Species and Homogeneous Catalysts

A unique chemical analytical approach is proposed based on the integration of chemical radiophysics with electrochemistry at the catalytically-active surface. This approach includes integration of: radiofrequency modulation polarography with platinum electrodes, applied as film enthrakometers for microwave measurements; microwave thermal analysis performed on enthrakometers as bolometric sensors; catalytic measurements, including registration of chemical self-oscillations on the surface of a platinum enthrakometer as the chemosensor; measurements on the Pt chemosensor implemented as an electrochemical chip with the enthrakometer walls acting as the chip walls; chemotron measurements and data processing in real time on the surface of the enthrakometric chip; microwave electron paramagnetic resonance (EPR) measurements using an enthrakometer both as a substrate and a microwave power meter; microwave acceleration of chemical reactions and microwave catalysis оn the Pt surface; chemical generation of radio- and microwaves, and microwave spin catalysis; and magnetic isotope measurements on the enthrakometric chip. The above approach allows one to perform multiparametric physical and electrochemical sensing on a single active enthrakometric surface, combining the properties of the selective electrochemical sensor and an additive physical detector.

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CO Oxidation on Stepped Rh Surfaces: μm-Scale Versus Nanoscale

Catalysis Letters ◽

10.1007/s10562-019-02950-0 ◽

2019 ◽

Vol 150 (3) ◽

pp. 605-612 ◽

Cited By ~ 2

Author(s):

Y. Suchorski ◽

I. Bespalov ◽

J. Zeininger ◽

M. Raab ◽

M. Datler ◽

...

Keyword(s):

Co Oxidation ◽

Oxidation Reaction ◽

Active Surface ◽

Reaction Conditions ◽

Miller Index ◽

Co Oxidation Reaction ◽

Catalytically Active ◽

Field Emission Microscopy ◽

Photoemission Electron

Abstract The catalytic CO oxidation reaction on stepped Rh surfaces in the 10−6 mbar pressure range was studied in situ on individual μm-sized high-Miller-index domains of a polycrystalline Rh foil and on nm-sized facets of a Rh tip, employing photoemission electron microscopy (PEEM) and field-ion/field-emission microscopy (FIM/FEM), respectively. Such approach permits a direct comparison of the reaction kinetics for crystallographically different regions under identical reaction conditions. The catalytic activity of the different Rh surfaces, particularly their tolerance towards poisoning by CO, was found to be strongly dependent on the density of steps and defects, as well as on the size (µm vs. nm) of the respective catalytically active surface. Graphic Abstract

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Thieme Chemistry Journals Awardees – Where Are They Now? Synthesis of a Dinuclear Copper NHC Complex Bearing a Rigid π-Conjugated Cyclic Framework

Synlett ◽

10.1055/s-0036-1588824 ◽

2017 ◽

Vol 28 (14) ◽

pp. 1775-1779

Author(s):

Daiki Inamori ◽

Takuya Miwa ◽

Tetsuaki Fujihara ◽

Yasushi Tsuji ◽

Jun Terao

Keyword(s):

Active Sites ◽

Coupling Reaction ◽

Cross Coupling ◽

Dinuclear Complexes ◽

Homogeneous Catalysts ◽

Dinuclear Copper ◽

Cross Coupling Reaction ◽

Catalytically Active

Macrocyclic dinuclear complexes have been gaining popularity in the design of homogeneous catalysts. Herein, we report the design of such a complex featuring catalytically active sites fixed inside the ring and its synthesis using a cross-coupling reaction.

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