Formation of catalytically active gold–polymer microgel hybrids via a controlled in situ reductive process

2013 ◽  
Vol 1 (42) ◽  
pp. 13244 ◽  
Author(s):  
Garima Agrawal ◽  
Marco Philipp Schürings ◽  
Patrick van Rijn ◽  
Andrij Pich
Keyword(s):  
Reductive Process ◽  
Catalytically Active

scholarly journals Shining light on the solid–liquid interface: in situ/operando monitoring of surface catalysis

2020 ◽  
Vol 10 (16) ◽  
pp. 5362-5385
Author(s):  
Leila Negahdar ◽  
Christopher M. A. Parlett ◽  
Mark A. Isaacs ◽  
Andrew M. Beale ◽  
Karen Wilson ◽  
...  
Keyword(s):  
Liquid Interface ◽  
Solid Catalyst ◽  
Chemical Transformations ◽  
Liquid Interfaces ◽  
Surface Catalysis ◽  
Catalytically Active ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Insight Into

Many industrially important chemical transformations occur at the interface between a solid catalyst and liquid reactants. In situ and operando spectroscopies offer unique insight into the reactivity of such catalytically active solid–liquid interfaces.

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

2019 ◽  
Vol 150 (3) ◽  
pp. 605-612 ◽  
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

Exsolved Fe–Ni nano-particles from Sr2Fe1.3Ni0.2Mo0.5O6 perovskite oxide as a cathode for solid oxide steam electrolysis cells

2016 ◽  
Vol 4 (37) ◽  
pp. 14163-14169 ◽  
Author(s):  
Y. Wang ◽  
T. Liu ◽  
M. Li ◽  
C. Xia ◽  
B. Zhou ◽  
...  
Keyword(s):  
Single Step ◽  
Solid Oxide ◽  
Nano Particles ◽  
Perovskite Oxide ◽  
Electrolysis Cells ◽  
Catalytically Active

A stable and catalytically active cathode consisting of homogeneously dispersed nano-socketed Fe–Ni particles has been elegantly fabricated in single-step treatment for solid oxide steam electrolysis cells via the in situ reduction of the Sr2Fe1.3Ni0.2Mo0.5O6 (SFMNi) material in a humidified H2 (3 vol% H2O) atmosphere at 800 °C.

scholarly journals In Situ Generated Nanosized Sulfide Ni-W Catalysts Based on Zeolite for the Hydrocracking of the Pyrolysis Fuel Oil into the BTX Fraction

Catalysts ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1152
Author(s):  
Tatiana Kuchinskaya ◽  
Mariia Kniazeva ◽  
Vadim Samoilov ◽  
Anton Maximov
Keyword(s):  
Photoelectron Spectroscopy ◽  
Active Phase ◽  
Fuel Oil ◽  
Oil Fraction ◽  
Transmission Electron ◽  
Catalytically Active ◽  
Pyrolysis Fuel Oil ◽  
Benzene Toluene ◽  
Catalytic Reactivity

The hydrocracking reaction of a pyrolysis fuel oil fraction using in situ generated nano-sized NiWS-sulfide catalysts is studied. The obtained catalysts were defined using X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The features of catalytically active phase generation, as well as its structure and morphology were considered. The catalytic reactivity of in situ generated catalysts was evaluated using the hydrocracking reaction of pyrolysis fuel oil to obtain a light fraction to be used as a feedstock for benzene, toluene, and xylene (BTX) production. It was demonstrated that the temperature of 380 °C, pressure of 5 MPa, and catalyst-to-feedstock ratio of 4% provide for a target fraction (IPB −180 °C) yield of 44 wt %, and the BTX yield of reaching 15 wt %.

In situ analysis of catalytically active Pd surfaces for CO oxidation with near ambient pressure XPS

2016 ◽  
Vol 260 ◽  
pp. 14-20 ◽  
Author(s):  
Hiroshi Kondoh ◽  
Ryo Toyoshima ◽  
Yuji Monya ◽  
Masaaki Yoshida ◽  
Kazuhiko Mase ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Ambient Pressure ◽  
In Situ Analysis ◽  
Ambient Pressure Xps ◽  
Catalytically Active ◽  
Near Ambient Pressure Xps

scholarly journals Addressing the characterisation challenge to understand catalysis in MOFs: the case of nanoscale Cu supported in NU-1000

2017 ◽  
Vol 201 ◽  
pp. 337-350 ◽  
Author(s):  
Ana E. Platero-Prats ◽  
Zhanyong Li ◽  
Leighanne C. Gallington ◽  
Aaron W. Peters ◽  
Joseph T. Hupp ◽  
...  
Keyword(s):  
Dynamic Structure ◽  
Atomic Layer ◽  
Scattering Data ◽  
Catalyst Activation ◽  
Reducing Atmosphere ◽  
X Ray Scattering ◽  
Layer Deposition ◽  
Pdf Analysis ◽  
Catalytically Active

We explore the dynamic structure and reactivity of Cu species supported on NU-1000. By combining pair distribution function (PDF) analysis and difference envelope density (DED) analysis of in situ synchrotron-based X-ray scattering data, we simultaneously probe the local structure of supported Cu-species, their distribution within NU-1000 and distortions of the NU-1000 lattice under conditions relevant to catalysis and catalyst activation. These analyses show that atomic layer deposition (ALD) of Cu in NU-1000 (Cu-AIM) leads to the formation of Cu-oxo clusters within the small pores that connect the triangular and hexagonal channels. Exposure of Cu-AIM to a reducing atmosphere at 200 °C produces metallic Cu0 of two distinct particle sizes: ∼4 nm nanoparticles and small sub-nanometer clusters. The size of these nanoparticles appears to be constrained by NU-1000 pore dimensions, with evidence of the sub-nanometer clusters being bound within the triangular channels flanked by pyrene rings. This supported Cu0–NU-1000 system is catalytically active for gas-phase ethylene hydrogenation. Exposure of the catalyst to oxidative atmosphere re-oxidises the Cu species to a Cu2O cuprite phase. The dynamic restructuring of the system in different chemical environments underscores the importance of probing these systems in situ.

scholarly journals Preparation of copper-red glazes by in-situ reductive process and its coloring research

2017 ◽  
Vol 125 (7) ◽  
pp. 584-587
Author(s):  
Congxu ZHU ◽  
Xiwang WU ◽  
Xuliang ZHU ◽  
Yabing WANG ◽  
Xinfang LIU ◽  
...  
Keyword(s):  
Reductive Process
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