BEGIN:VCALENDAR VERSION:2.0 PRODID:icalendar-ruby CALSCALE:GREGORIAN X-WR-CALNAME:CBE Seminar: Yuriy Román-Leshkov: Architecture at the nanosca le: Engineering cooperativity in metalloenzyme-like microporous catalysts X-WR-TIMEZONE:Eastern Time (US & Canada) BEGIN:VEVENT DTSTAMP:20260715T050654Z UID:tag:localist.com\,2008:EventInstance_1429094 DTSTART:20151005T130000Z DTEND:20151005T140000Z DESCRIPTION:Associate Professor \nDepartment of Chemical Engineering\nMassa chusetts Institute of Technology\n\nIn our efforts to shift away from trad itional petroleum-based raw materials to supply fuels and chemicals\, alte rnative carbon sources\, such as biomass\, methane\, and carbon dioxide ha ve emerged as attractive feedstock options. However\, their unique chemi cal makeup has created daunting conversion challenges that require the dev elopment of a new generation of robust\, active\, and selective catalysts to promote selective bond-breaking events. In this respect\, the precise placement of chemical functionality surrounding an active site can generat e high degrees of catalytic activity and selectivity. Biological catalysts often exploit this feature to catalyze reactions under mild conditions. F or example methane mono-oxygenase is capable of oxidizing C-H bonds in met hane and other alkanes at room temperature using iron pairs arranged in Fe -O-Fe cores. In the context of inorganic heterogeneous catalysis\, the con cept of catalytic pairs\, whereby an active site’s reactivity is enhance d by the presence of another active site in close proximity\, is a powerfu l yet relatively unexplored area of research. In this lecture\, I will dis cuss the use of combined reactivity and characterization tools to study\, understand\, and ultimately design nanostructured\, metalloenzyme-like zeo litic materials featuring catalytic cooperativity. First\, the use of Lewi s acid zeolites as catalysts for the conversion of biomass-derived oxygena tes will be discussed. Specific examples will highlight the role that intr a-pore catalytic pairs play either in enhancing the activation of targeted functional groups\, achieving cooperative catalysis\, or promoting one-po t cascade reaction sequences. Lewis/Brønsted acid pairs will shown to cat alyze hydrolysis/transfer hydrogenation cascades for the conversion of fur fural into gamma-valerolactone\, while Lewis acid/base pairs will be shown to cooperatively catalyze C-C coupling. Second\, the use of copper-excha nged zeolites for the tandem oxidation and carbonylation of methane into a cetic acid will be discussed as an example of cooperativity between redox- active and acid sites.\n\nShort Bio\n\nProf. Román was born in Mexico Cit y\, Mexico. He obtained his Bachelor of Science degree in Chemical Enginee ring at the University of Pennsylvania in 2002 and completed his Ph.D. at the University of Wisconsin-Madison\, also in Chemical Engineering\, under the guidance of Prof. James Dumesic. At UW he worked on developing catal ytic strategies to convert biomass-derived carbohydrates into platform che micals. Before joining the department of Chemical Engineering at MIT as a n Assistant Professor\, he completed a two-year postdoc at Caltech\, worki ng with Prof. Mark E. Davis on the synthesis of zeolites and mesoporous ma terials for the activation of small molecules and biomass-derived oxygenat es. Prof. Roman’s has been awarded the SHPE Outstanding Young Investigat or and the NSF CAREER awards.\n\nProf. Román’s research lies at the int erface of heterogeneous catalysis and materials design. His group applies a wide range of synthetic\, spectroscopic\, and reaction engineering tool s to study the chemical transformation of molecules on catalytic surfaces. A strong emphasis is placed on the application of catalytic materials to tackle relevant problems associated with sustainable energy\, biofuels\, and renewable chemicals. Current efforts are geared toward designing wat er-tolerant solid Lewis acids\, investigating cooperative effects of catal ytic pairs\, and engineering transition metal carbides and nitrides as rep lacements for critical materials. \n\nhttp://www.romangroup.mit.edu/ LOCATION:Olin Hall\, 165 SUMMARY:CBE Seminar: Yuriy Román-Leshkov: Architecture at the nanoscale: E ngineering cooperativity in metalloenzyme-like microporous catalysts URL;VALUE=URI:https://events.cornell.edu/event/cbe_seminar_yuriy_roman CATEGORIES:Seminar END:VEVENT END:VCALENDAR