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Selective Deposition of Gold Nanoparticles on or Inside Carbon Nanotubes and Their Catalytic Activity for Preferential Oxidation of CO
Author(s) -
Castillejos Eva,
Chico Rubén,
Bacsa Revathi,
Coco Silverio,
Espinet Pablo,
PérezCadenas María,
GuerreroRuiz Antonio,
RodríguezRamos Inmaculada,
Serp Philippe
Publication year - 2010
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201000643
Subject(s) - catalysis , carbon nanotube , chemistry , nanoparticle , colloidal gold , decomposition , precipitation , carbon fibers , chemical engineering , deposition (geology) , sintering , nitrogen , hydrogen , inorganic chemistry , selectivity , nanotechnology , organic chemistry , materials science , paleontology , physics , sediment , meteorology , composite number , engineering , composite material , biology
Gold nanoparticles have been deposited on three kinds of carbon nanotubes (CNTs), including nitrogen‐doped CNTs, by three different methods, namely, impregnation, organometallic decomposition, and deposition–precipitation. The choice of the gold precursor, the support, and the preparation procedure is critical for the control of the size and location (on or inside the nanotubes) of the gold nanoparticles. These catalysts were tested for the selective oxidation of CO in a hydrogen‐rich atmosphere. We have shown that the use of nitrogen‐doped CNTs as a support permits one to reach much higher activity and selectivity at low temperaturethan with the other CNT supports. This catalyst also shows a good stability under reaction conditions without detectable sintering.