When Gold Is Not Noble: Catalysis by Nanoparticles
Tóm tắt
Bulk gold is chemically inert and is generally regarded as a poor catalyst. However, when gold is in very small particles with diameters below 10 nm and is deposited on metal oxides or activated carbon, it becomes surprisingly active, especially at low temperatures, for many reactions such as CO oxidation and propylene epoxidation. The catalytic performance of Au is defined by three major factors: contact structure, support selection, and particle size. The role of the perimeter interfaces of Au particles as the sites for reactions is discussed as well as the change in chemical reactivity of Au clusters composed of fewer than 300 atoms. © 2003 The Japan Chemical Journal Forum and Wiley Periodicals, Inc., Chem Rec 3: 75–87; 2003: Published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/tcr.10053
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Tài liệu tham khảo
Ponec V., 1996, Catalysis by Metals and Alloys
Haruta M.;Kobayashi T.;Iijima S.;Delannay F.Proc 9th Int Congr Catal Calgary Canada July1988 p1206.
Osaka National Research Institute Activity Report No. 393 1999.
Haruta M., 2000, Advances in Catalyst Preparation (in Japanese), 39
Prati L., 2000, Green Chemistry: Challenging Perspectives, 183
M. Ichikawa T. Akita M. Okumura K. Tanaka M. Haruta 2001 National Institute of Materials Science Tsukuba Japan 369
Chem Eng News July 5 1999 p33.
Lipkowski J., 1997, Electrocatalysis, Frontiers in Electrochemistry
Sinha A.;Seelan S.;Akita T.;Tsubota S.;Haruta M.Appl Catal A General in press.
Haruta M., 2003, Catalysis and Electrocatalysis on Nanoparticles, 243
Wagner F.E., 1997, J Chem Soc, 93, 3403
Haruta M., 1992, Now and Future, 7, 13
Ueda A., 1992, Shigen Kankyou Taisaku (Resources and the Environmental Technology), 28, 1035
Ueda A., 1996, Appl Catal B: Environmental, 285, 81
Stepanov V.M., 1975, Russian J Phys Chem, 49, 1335
Okumura M.;Haruta M.;Wang X.;Kajikawa O.;Okada O.Abstract 3rd Intern Conf Environmental Catal Tokyo Dec2001 p15.
Haruta M.c, 1996, Ultraclean Technology (in Japanese), 8, 1
cDaté M., Jpn Pat Appl, 2000‐158422