Contrast variation method applied to structural evaluation of catalysts by X-ray small-angle scattering.

ABSTRACT: In the process of developing carbon-supported metal catalysts, determining the catalyst particle-size distribution is an essential step, because this parameter is directly related to the catalytic activities. The particle-size distribution is most effectively determined by small-angle X-ray scattering (SAXS). When metal catalysts are supported by high-performance mesoporous carbon materials, however, their mesopores may lead to erroneous particle-size estimation if the sizes of the catalysts and mesopores are comparable. Here we propose a novel approach to particle-size determination by introducing contrast variation-SAXS (CV-SAXS). In CV-SAXS, a multi-component sample is immersed in an inert solvent with a density equal to that of one of the components, thereby rendering that particular c

SUBMITTER: Mufundirwa A 

PROVIDER: S-EPMC10817912 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature