Publication: Acetylene ligands stabilize atomically dispersed supported rhodium complexes under harsh conditions
Program
KU Authors
Co-Authors
Hoffman, Adam S.
Hong, Jiyun
Perez-Aguilar, JorgeE.
Bare, Simon R.
Publication Date
Language
Type
Embargo Status
Journal Title
Journal ISSN
Volume Title
Alternative Title
Abstract
Facile sintering of atomically dispersed supported noble metal catalysts at catalytically relevant temperatures, particularly under reducing conditions, poses a challenge for their practical applications. Some ligands, such as carbonyls, aid in improving the stability at the expense of severely suppressing the catalytic activity. Here, we demonstrate that substitution of the carbonyl ligands with reactive acetylene ligands can maintain the atomic dispersion of the supported mononuclear rhodium complex under harsh reducing conditions (>573 K), as confirmed by in -situ X-ray absorption near -edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectroscopies. In contrast, the supported rhodium carbonyl complex aggregates into nanoclusters under identical conditions. Furthermore, our results indicate that the acetylene ligands provide this anti -sintering ability while retaining the hydrogenation activity.
Source
Publisher
Elsevier Science Sa
Subject
Engineering, Environmental, Chemical
Citation
Has Part
Source
Chemical Engineering Journal
Book Series Title
Edition
DOI
10.1016/j.cej.2024.149738