Unknown

Dataset Information

0

Nanoscale Chemical Imaging of a Single Catalyst Particle with Tip-Enhanced Fluorescence Microscopy.


ABSTRACT: Determining the active site in real-life solid catalysts remains an intellectual challenge and is crucial for exploring the road towards their rational design. In recent years various micro-spectroscopic methods have revealed valuable structure-activity data at the level of a single catalyst particle, even under reaction conditions. Herein, we introduce Tip-Enhanced FLuorescence (TEFL) microscopy as a novel and versatile characterization tool for catalysis research. This has been achieved using a Fluid Catalytic Cracking (FCC) catalyst as showcase material. Thin sectioning of industrially used FCC particles together with selective staining of Brønsted acidity has enabled high-resolution TEFL mapping of different catalyst regions. Hyperspectral information gained via TEFL microscopy reveals a spatial distribution of Brønsted acidity within individual zeolite domains in different regions of the FCC catalyst particle. Comparison of TEFL measurements from different FCC particles showed significant intra- and inter-particle heterogeneities both in zeolite domain size and chemical reactivity.

SUBMITTER: Kumar N 

PROVIDER: S-EPMC6472685 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature

Similar Datasets

| S-EPMC9826433 | biostudies-literature
| S-EPMC8456802 | biostudies-literature
| S-EPMC4822187 | biostudies-literature
| S-EPMC10801917 | biostudies-literature
| S-EPMC4820382 | biostudies-literature
| S-EPMC5765468 | biostudies-literature
| S-EPMC9118545 | biostudies-literature
| S-EPMC5722649 | biostudies-literature
| S-EPMC5632810 | biostudies-literature
| S-EPMC9851175 | biostudies-literature