Trend of catalytic activity of CO oxidation on Rh and Ru nanoparticles: Role of surface oxide
作者： Sunmi Kim , Kamran Qadir , Sookyoung Jin , A. Satyanarayana Reddy , Bora Seo
DOI: 10.1016/J.CATTOD.2011.09.024
关键词:
摘要: Abstract Recent studies suggest that surface oxides on transition metal nanoparticles play an important role in determining the catalytic activity of CO oxidation. In this work, we investigated influence modification Rh and Ru oxidation using UV-ozone treatment. Monodisperse were synthesized by polyol reduction poly(vinylpyrrolidone) (PVP) as a capping agent. The size was controlled varying concentration precursors or seeded-growth method. changes occurred during treatment characterized with X-ray photoelectron spectroscopy, which showed state increased after activation energy nanoparticle arrays measured before chemical modification. Our reaction indicate turnover rate increases factor three due to formation catalytically active oxide. contrast, decreases treatment, suggesting bulk oxide formed is inactive. results intriguing way tune via engineering nanoscale
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sci-hub.se 参考文章(31)
Gary L. Haller, Daniel E. Resasco, Metal–Support Interaction: Group VIII Metals and Reducible Oxides Advances in Catalysis. ,vol. 36, pp. 173- 235 ,(1989) , 10.1016/S0360-0564(08)60018-8
Jill Chastain, Roger C. King, John F. Moulder, Handbook of X Ray Photoelectron Spectroscopy: A Reference Book of Standard Spectra for Identification and Interpretation of Xps Data ,(1995)
Gabor A. Somorjai, Heinz Frei, Jeong Y. Park, Advancing the frontiers in nanocatalysis, biointerfaces, and renewable energy conversion by innovations of surface techniques. Journal of the American Chemical Society. ,vol. 131, pp. 16589- 16605 ,(2009) , 10.1021/JA9061954
Cesar Aliaga, Jeong Y. Park, Yusuke Yamada, Hyun Sook Lee, Chia-Kuang Tsung, Peidong Yang, Gabor A. Somorjai, Sum Frequency Generation and Catalytic Reaction Studies of the Removal of Organic Capping Agents from Pt Nanoparticles by UV−Ozone Treatment Journal of Physical Chemistry C. ,vol. 113, pp. 6150- 6155 ,(2009) , 10.1021/JP8108946
Michael E. Grass, Sang Hoon Joo, Yawen Zhang, Gabor A. Somorjai, Colloidally Synthesized Monodisperse Rh Nanoparticles Supported on SBA-15 for Size- and Pretreatment-Dependent Studies of CO Oxidation Journal of Physical Chemistry C. ,vol. 113, pp. 8616- 8623 ,(2009) , 10.1021/JP901288M
R. Blume, M. Hävecker, S. Zafeiratos, D. Teschner, E. Vass, P. Schnörch, A. Knop-Gericke, R. Schlögl, S. Lizzit, P. Dudin, A. Barinov, M. Kiskinova, Monitoring in situ catalytically active states of Ru catalysts for different methanol oxidation pathways. Physical Chemistry Chemical Physics. ,vol. 9, pp. 3648- 3657 ,(2007) , 10.1039/B700986K
G. ERTL, Oscillatory kinetics and spatio-temporal self-organization in reactions at solid surfaces. Science. ,vol. 254, pp. 1750- 1755 ,(1991) , 10.1126/SCIENCE.254.5039.1750
Sang Hoon Joo, Jeong Y. Park, J. Russell Renzas, Derek R. Butcher, Wenyu Huang, Gabor A. Somorjai, Size Effect of Ruthenium Nanoparticles in Catalytic Carbon Monoxide Oxidation Nano Letters. ,vol. 10, pp. 2709- 2713 ,(2010) , 10.1021/NL101700J
Jeong Y. Park, Hyunjoo Lee, J. Russell Renzas, Yawen Zhang, Gabor A. Somorjai, Probing Hot Electron Flow Generated on Pt Nanoparticles with Au/TiO2 Schottky Diodes during Catalytic CO Oxidation Nano Letters. ,vol. 8, pp. 2388- 2392 ,(2008) , 10.1021/NL8012456
Hyunjoon Song, Robert M. Rioux, James D. Hoefelmeyer, Russell Komor, Krisztian Niesz, Michael Grass, Peidong Yang, Gabor A. Somorjai, Hydrothermal growth of mesoporous SBA-15 silica in the presence of PVP-stabilized Pt nanoparticles: synthesis, characterization, and catalytic properties. Journal of the American Chemical Society. ,vol. 128, pp. 3027- 3037 ,(2006) , 10.1021/JA057383R