How can the modern scanning transmission electron microscope aid catalysis science?

Novem­ber 2018
Prof. Eric A. Stach
Uni­ver­si­ty of Penn­syl­va­nia
E-mail: stach@​seas.​upenn.​edu, Web:https://stachgroup.seas.upenn.edu/
Abstract: The past decade or so have seen a num­ber of tech­no­log­i­cal advances in the field of trans­mis­sion elec­tron microscopy that have dra­mat­i­cal­ly enhanced both the util­i­ty and uti­liza­tion of the instru­ment in the field of het­ero­ge­neous catal­y­sis. These include aber­ra­tion cor­rec­tion, enhanced detec­tors and improve­ments in sim­u­la­tion and analy­sis soft­ware. In this pre­sen­ta­tion, I will present sev­er­al spe­cif­ic exam­ples from both my own research and from oth­ers in the field to pro­vide a gen­er­al overview of the state of the art. In spe­cif­ic, I will describe the lim­its of spa­tial, spec­tro­scop­ic and tem­po­ral ener­gy res­o­lu­tion, and demon­strate how one can per­form both real time and operan­do mea­sure­ments do char­ac­ter­ize the inter­re­la­tion­ships between cat­a­lyst struc­ture and cat­a­lyst func­tion. Through the pre­sen­ta­tion, I will empha­size how these tech­niques are being imple­ment­ed at the Singh Cen­ter for Nan­otech­nol­o­gy at the Uni­ver­si­ty of Penn­syl­va­nia and how they are thus acces­si­ble to mem­bers of the Cat­a­lyst Club of Philadel­phia.