2007 Spring Symposium

 
Chris Brooks^a, Stephen Cypes^b, Robert K. Gras­sel­li^c,d, Alfred Hage­meyerb, Zach Hogan^b, Andreas Lesik^b, Gui­do Streukens^b, Antho­ny F. Volpe Jr.^b,*, Howard W. Turn­er^b, W. Hen­ry Wein­berg^b and Karin Yac­ca­to^b
Pre­sent­ed by Joel Cize­ron

Abstract — High-through­put tech­niques and approach­es have been applied to the dis­cov­ery of cat­a­lysts for selec­tive low tem­per­a­ture CO oxi­da­tion and for the water–gas shift (WGS) reac­tion. Mul­ti­ple lev­els of screen­ing were used with increas­ing test com­plex­i­ty as the num­ber of sam­ples decreased due to the elim­i­na­tion of poor-per­form­ing sam­ples and focus­ing on the most promis­ing cat­a­lyst can­di­dates. Pri­ma­ry screens are used for the dis­cov­ery of hits, and quan­ti­ta­tive sec­ondary screens for hit con­fir­ma­tion, lead opti­miza­tion and scale-up.

Nov­el RuCoCe com­po­si­tions were dis­cov­ered and opti­mized for CO oxidation/VOC removal and the effect of met­al pre­cur­sors used and dop­ing was inves­ti­gat­ed for sup­port­ed and bulk mixed oxide cat­a­lysts. For WGS, noble met­al-free and Pt-doped CoFeRu mixed oxides as well as Pt on CeO₂ and Pt on CeO₂/ZrO₂ were inves­ti­gat­ed and a new syn­er­gis­tic PtFeCe ternary com­po­si­tion was dis­cov­ered. Alka­line met­al dop­ing was found to enhance the selec­tiv­i­ty towards WGS by sup­press­ing the uns­e­lec­tive metha­na­tion side reac­tion and to increase the low tem­per­a­ture cat­alyt­ic activ­i­ty.