Active sites and reactive intermediates in the hydrogenolytic cleavage of C-C bonds in cyclohexane over supported iridium

Hydrogenolysis of cyclohexane has been explored over supported Ir catalysts. The kinetic data are combined with modeling results to assess the structural requirements and the nature of catalytically relevant surface intermediates for endocyclic C-C bond cleavage. The turnover frequency (TOF) for cyclohexane hydrogenolysis showed complex dependence on Ir particle size, while the selectivity to the primary ring opening product, n-hexane, decreased monotonically with decreasing Ir dispersion. The decreasing TOF as the Ir dispersion decreased from 65     «

Hydrogenolysis of cyclohexane has been explored over supported Ir catalysts. The kinetic data are combined with modeling results to assess the structural requirements and the nature of catalytically relevant surface intermediates for endocyclic C-C bond cleavage. The turnover frequency (TOF) for cyclohexane hydrogenolysis showed complex dependence on Ir particle size, while the selectivity to the primary ring opening product, n-hexane, decreased monotonically with decreasing Ir dispersion. The d...     »

ISI Document Delivery No.: 035IP Times Cited: 2 Cited Reference Count: 68 Shi, Hui Li, Xuebing Haller, Gary L. Gutierrez, Oliver Y. Lercher, Johannes A. Elitenetzwerk Bayern NanoCat Hui Shi thanks the Elitenetzwerk Bayern NanoCat for a Ph.D. grant and financial support. The authors are indebted to Dipl.-Ing. Xaver Hecht for the help with construction of the reactor setup and for conducting N2 physisorption and H2 chemisorption measurements. Skillful assistances from Dr. Marianne Hanzlik (Technical university of Munich, Germany) and Dr. Andrew DelaRiva (University of New Mexico, USA) are gratefully acknowledged during the TEM measurements. We also thank Dr. George D. Meitzner (Edge Analytical, Inc.) for his critical reading of the manuscript. 2 Academic press inc elsevier science San diego     «

ISI Document Delivery No.: 035IP Times Cited: 2 Cited Reference Count: 68 Shi, Hui Li, Xuebing Haller, Gary L. Gutierrez, Oliver Y. Lercher, Johannes A. Elitenetzwerk Bayern NanoCat Hui Shi thanks the Elitenetzwerk Bayern NanoCat for a Ph.D. grant and financial support. The authors are indebted to Dipl.-Ing. Xaver Hecht for the help with construction of the reactor setup and for conducting N2 physisorption and H2 chemisorption measurements. Skillful assistances from Dr. Marianne Hanzlik (Technic...     »