Iridium Complexes and Clusters in Dealuminated Zeolite HY: Distribution between Crystalline and Impurity Amorphous Regions

Journal Article · Tue Jul 08 00:00:00 EDT 2014 · ACS Catalysis, 4(8):2662–2666

DOI:https://doi.org/10.1021/cs5006426· OSTI ID:1171885

Martinez-Macias, Claudia; Xu, Pinghong; Hwang, Son-Jong; Lu, Jing; Chen, Cong-Yan; Browning, Nigel D.; Gates, Bruce C.

Dealuminated zeolite HY was used to support Ir(CO)2 complexes formed from Ir(CO)2(C5H7O2). Infrared and X-ray absorption spectra and atomic-resolution electron microscopy images identify these complexes, and the images and 27Al NMR spectra identify impurity amorphous regions in the zeolite where the iridium is more susceptible to aggregation than in the crystalline regions. The results indicate a significant stability limitation of metal in amorphous impurity regions of zeolites.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1171885
• Report Number(s): PNNL-SA-101739; 47296
• Journal Information: ACS Catalysis, 4(8):2662–2666, Journal Name: ACS Catalysis, 4(8):2662–2666
• Country of Publication: United States
• Language: English

Related Subjects

Zeolite
Iridium Complexes
Environmental Molecular Sciences Laboratory