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Vital Role of Moisture in the Catalytic Activity of Supported Gold Nanoparticles
Author(s) -
Daté Masakazu,
Okumura Mitsutaka,
Tsubota Susumu,
Haruta Masatake
Publication year - 2004
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200453796
Subject(s) - moisture , catalysis , colloidal gold , nanoparticle , chemical engineering , materials science , oxide , chemistry , nanotechnology , composite material , organic chemistry , metallurgy , engineering
Supported gold nanoparticles exhibit high catalytic activity not only at low temperatures, but also under the presence of moisture. The effect of moisture on CO oxidation over Au/TiO 2 , Au/Al 2 O 3 , and Au/SiO 2 was studied at 273 K. It was found that the catalytic activities are enhanced by moisture by up to two orders of magnitude, and that the moisture effect depends on the type of oxide support (see picture, TOF=turnover frequency).