Results 31 to 40 of about 143,250 (293)

Some considerations related to the use of the Scherrer equation in powder X-ray diffraction as applied to heterogeneous catalysts [PDF]

open access: yes, 2016
This short overview summarises some of the basic considerations which should be undertaken when the Scherrer equation is applied to reflection widths in X-ray diffraction patterns of heterogeneous catalysts in order to extract meaningful information ...
Hargreaves, J.S.J.
core   +1 more source

In Situ Analytical Methods for the Characterization of Mechanochemical Reactions

open access: yesCrystals, 2022
The interest in mechanochemical reactions and their fields of application have increased enormously in recent times. Mechanically activated reactions offer the advantage of cost-efficiency as well as environmentally friendly syntheses routes. In contrast
Claudia Weidenthaler
doaj   +1 more source

The Impact of Nanoscience on Heterogeneous Catalysis [PDF]

open access: yesScience, 2003
Most catalysts consist of nanometer-sized particles dispersed on a high-surface-area support. Advances in characterization methods have led to a molecular-level understanding of the relationships between nanoparticle properties and catalytic performance.
openaire   +3 more sources

Electronic parameters in cobalt-based perovskite-type oxides as descriptors for chemocatalytic reactions

open access: yesNature Communications, 2020
Design of efficient catalysts requires understanding the decisive electronic parameters for catalytic efficacy and their dependence on elemental composition.
Johannes Simböck   +5 more
doaj   +1 more source

The steam reforming of acetol on Ni/La2O3-Al2O3 studied by transient and isotopic methods

open access: yesCatalysis Communications, 2023
Operando-SSITKA (Mass spectrometry-DRIFTS) and other isotopic experiments were employed to investigate the steam reforming of acetol on 10-wt% Ni/La2O3-Al2O3 at 500 °C. A large concentration (1 
Klito C. Petallidou   +4 more
doaj   +1 more source

Heterogeneous Catalysis on a Disordered Surface

open access: yes, 1995
We introduce a simple model of heterogeneous catalysis on a disordered surface which consists of two types of randomly distributed sites with different adsorption rates.
D. ben-Avraham   +17 more
core   +1 more source

The Success Story of Gold-Based Catalysts for Gas- and Liquid-Phase Reactions: A Brief Perspective and Beyond [PDF]

open access: yes, 2019
Gold has long held the fascination of mankind. For millennia it has found use in art, cosmetic metallurgy and architecture; this element is seen as the ultimate statement of prosperity and beauty.
Ivanova, Svetlana   +4 more
core   +1 more source

Utilization of mechanocatalytic oligosaccharides by ethanologenic Escherichia coli as a model microbial cell factory

open access: yesAMB Express, 2020
Mechanocatalysis is a promising method for depolymerization of lignocellulosic biomass. Microbial utilization of the resulting oligosaccharides is one potential route of adding value to the depolymerized biomass.
Tao Jin   +4 more
doaj   +1 more source

Microwave assisted heterogeneous catalysis: effects of varying oxygen concentrations on the oxidative coupling of methane [PDF]

open access: yes, 2009
The oxidative coupling of methane was investigated over alumina supported La2O3/CeO2 catalysts under microwave dielectric heating conditions at different oxygen concentrations.
A Machocki   +28 more
core   +1 more source

Ethene dimerization on zeolite-hosted Ni ions : reversible mobilization of the active site [PDF]

open access: yes, 2019
The active site in ethene oligomerization catalyzed by Ni-zeolites is proposed to be a mobile Ni(II) complex, based on density functional theory-based molecular dynamics (DFT-MD) simulations corroborated by continuous-flow experiments on Ni-SSZ-24 ...
Botan, Alexandru   +6 more
core   +3 more sources

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