caa a22 4500 475844467 CHVBK 20180406123910.0 cr unu---uuuuu 170329e20000701xx s 000 0 eng 10.1023/A:1009089023367 doi (NATIONALLICENCE)springer-10.1023/A:1009089023367 Model catalysts fabricated by electron beam lithography: AFM and TPD surface studies and hydrogenation/dehydrogenation of cyclohexene + H2 on a Pt nanoparticle array supported by silica [Elektronische Daten] [Aaron Eppler, Ji Zhu, Erik Anderson, Gabor Somorjai] Pt nanoparticle model catalysts with 28 ± 2 nm diameters and 100 ± 2 nm square periodicity have been fabricated with electron beam lithography on silica substrates. The reactivity of the Pt/SiO2 arrays was compared to a Pt foil for cyclohexene + H2 at 100°C. The overall reactivity of the Pt particle arrays was higher by a factor of two, the selectivity towards dehydrogenation was three times higher, and the rate of deactivation was about the same as for the Pt foil. Since the primary difference between the nanoparticle array and the Pt foil was the interface between the Pt and the SiO2, the interfacial region was most likely responsible for the changes in reactivity on the arrays. Using AFM, SEM, and TPD, the arrays were characterized before and after being exposed to reaction conditions. AFM images of a sample cleaned by ion sputtering showed that the pattern of the Pt nanoparticle array was replicated in the silica during the sputtering process. Kluwer Academic Publishers, 2000 Pt/SiO2 model catalysts nationallicence cyclohexene hydrogenation/dehydrogenation nationallicence Pt nanoparticle characterization nationallicence electron beam lithography nationallicence Eppler Aaron Department of Chemistry, University of California, 94720, Berkeley, CA, USA aut Zhu Ji Department of Chemistry, University of California, 94720, Berkeley, CA, USA aut Anderson Erik Materials Sciences Division, Lawrence Berkeley National Laboratory, 94720, Berkeley, CA, USA aut Somorjai Gabor Department of Chemistry, University of California, 94720, Berkeley, CA, USA aut Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 13/1-2(2000-07-01), 33-41 1022-5528 13:1-2<33 2000 13 11244 https://doi.org/10.1023/A:1009089023367 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1009089023367 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Eppler Aaron Department of Chemistry, University of California, 94720, Berkeley, CA, USA aut NATIONALLICENCE 700 1- Zhu Ji Department of Chemistry, University of California, 94720, Berkeley, CA, USA aut NATIONALLICENCE 700 1- Anderson Erik Materials Sciences Division, Lawrence Berkeley National Laboratory, 94720, Berkeley, CA, USA aut NATIONALLICENCE 700 1- Somorjai Gabor Department of Chemistry, University of California, 94720, Berkeley, CA, USA aut NATIONALLICENCE 773 0- Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 13/1-2(2000-07-01), 33-41 1022-5528 13:1-2<33 2000 13 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer