发明名称 |
Subnanometer and nanometer catalysts, method for preparing size-selected catalysts |
摘要 |
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.
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申请公布号 |
US8148293(B2) |
申请公布日期 |
2012.04.03 |
申请号 |
US20100869459 |
申请日期 |
2010.08.26 |
申请人 |
VAJDA STEFAN;PELLIN MICHAEL J.;ELAM JEFFREY W.;MARSHALL CHRISTOPHER L.;WINANS RANDALL A.;MEIWES-BROER KARL-HEINZ;UCHICAGO ARGONNE, LLC |
发明人 |
VAJDA STEFAN;PELLIN MICHAEL J.;ELAM JEFFREY W.;MARSHALL CHRISTOPHER L.;WINANS RANDALL A.;MEIWES-BROER KARL-HEINZ |
分类号 |
B01J23/00;B01J20/00;B01J21/00;B01J29/00;B01J37/00 |
主分类号 |
B01J23/00 |
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