2026-09-20T03:29:47Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/84039 2023-07-11 col_2142_5131 col_2142_14789 com_2142_5130 com_2142_14788 com_2142_8903

Nuzzo, Ralph G. Hills, Charles West 2015-09-25T22:12:31Z 2015-09-25T22:12:31Z 10000-01-01 2001 2001 The reductive condensation of a carbon-supported molecular cluster precursor, PtRu5C(CO)16, into a bimetallic nanoparticle has been followed by using in-situ extended X-ray absorption fine structure spectroscopy, temperature programmed desorption, and scanning-transmission electron microscopy. The data reveal that during activation in hydrogen the stabilizing CO shell is lost, and the metal centers assume an increasingly metallic electronic character. The incipient Pt-Ru nanoparticles initially form a disordered structure at 473 K in which Pt is found preferentially at the core of the condensing particle. After further high temperature treatment to 673 K, the nanoparticles adopt an inverted structure in which Pt appears preferentially at the surface of the equilibrated bimetallic nanoparticle. (Abstract shortened by UMI.). Made available in DSpace on 2015-09-25T22:12:31Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3023073.pdf: 8604998 bytes, checksum: d17b47e82b367dd757722631b730c5dc (MD5) Previous issue date: 2001 Embargo set by: Seth Robbins for item 85320 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 157 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2001. http://hdl.handle.net/2142/84039 (MiAaPQ)AAI3023073 eng Chemistry, Analytical Structural Characterization and Phase Behavior in Supported Metallic Nanoparticles text Chemistry Chemistry University of Illinois at Urbana-Champaign Dissertation Ph.D.