The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 03, 2012
Filed:
Aug. 26, 2010
Stefan Vajda, Lisle, IL (US);
Michael J. Pellin, Naperville, IL (US);
Jeffrey W. Elam, Elmhurst, IL (US);
Christopher L. Marshall, Naperville, IL (US);
Randall A. Winans, Downers Grove, IL (US);
Karl-heinz Meiwes-broer, Roggentin, GR;
Stefan Vajda, Lisle, IL (US);
Michael J. Pellin, Naperville, IL (US);
Jeffrey W. Elam, Elmhurst, IL (US);
Christopher L. Marshall, Naperville, IL (US);
Randall A. Winans, Downers Grove, IL (US);
Karl-Heinz Meiwes-Broer, Roggentin, GR;
UChicago Argonne, LLC, Chicago, IL (US);
Abstract
Highly uniform cluster based nanocatalysts supported on technologically relevant supports were synthesized for reactions of top industrial relevance. The Pt-cluster based catalysts outperformed the very best reported ODHP catalyst in both activity (by up to two orders of magnitude higher turn-over frequencies) and in selectivity. The results clearly demonstrate that highly dispersed ultra-small Pt clusters precisely localized on high-surface area supports can lead to affordable new catalysts for highly efficient and economic propene production, including considerably simplified separation of the final product. The combined GISAXS-mass spectrometry provides an excellent tool to monitor the evolution of size and shape of nanocatalyst at action under realistic conditions. Also provided are sub-nanometer gold and sub-nanometer to few nm size-selected silver catalysts which possess size dependent tunable catalytic properties in the epoxidation of alkenes. Invented size-selected cluster deposition provides a unique tool to tune material properties by atom-by-atom fashion, which can be stabilized by protective overcoats.