TY - JOUR
T1 - Preparation and characterization of nanocrystalline Noble metal films By MOCVD
AU - Guerrero, R. Martinez
AU - Torres, M. Z.Figueroa
AU - Zuñiga, I. M.Montaño
AU - Estrada, E. M.Arce
AU - Garcia, J. R.Vargas
PY - 2005
Y1 - 2005
N2 - Noble metals such as palladium, platinum, iridium and ruthenium were prepared in ah horizontal hot-wall MOCVD apparatus using metal-acetylacetonates as precursors. A wide range of deposition conditions (Tdep=250-800 °C and Ptotal=0.1-500 Tott) was explored and the effects on the features of the films were investigated. Structural and morphological characteristics were found to be very sensitive to those conditions. By the use of appropriate conditions and reactive gas (H2 or O2), high-purity, dense and oriented films were obtained. On the other hand, films consisted of agglomerated nanocrystalline particles of pure metals or metal oxides were also possible to obtain. The size of nanoparticles varied from 15 to 100 nm depending on deposition conditions. The nanocrystalline nature of films was used for applications requiring large surface area such as electrocatalysts for electrochemical reactions of technological interest. Nanocrystalline platinum films prepared by MOCVD exhibited superior electrocatalitic activity than platinum electrocatalysts prepared by conventional methods in the hydrogen evolution reaction. In addition, iridiumruthenium oxide films showed to be very promising for the oxygen evolution reaction.
AB - Noble metals such as palladium, platinum, iridium and ruthenium were prepared in ah horizontal hot-wall MOCVD apparatus using metal-acetylacetonates as precursors. A wide range of deposition conditions (Tdep=250-800 °C and Ptotal=0.1-500 Tott) was explored and the effects on the features of the films were investigated. Structural and morphological characteristics were found to be very sensitive to those conditions. By the use of appropriate conditions and reactive gas (H2 or O2), high-purity, dense and oriented films were obtained. On the other hand, films consisted of agglomerated nanocrystalline particles of pure metals or metal oxides were also possible to obtain. The size of nanoparticles varied from 15 to 100 nm depending on deposition conditions. The nanocrystalline nature of films was used for applications requiring large surface area such as electrocatalysts for electrochemical reactions of technological interest. Nanocrystalline platinum films prepared by MOCVD exhibited superior electrocatalitic activity than platinum electrocatalysts prepared by conventional methods in the hydrogen evolution reaction. In addition, iridiumruthenium oxide films showed to be very promising for the oxygen evolution reaction.
KW - Electrocatalytic activity
KW - MOCVD
KW - Nanocrystalline films
KW - Noble metal films
UR - http://www.scopus.com/inward/record.url?scp=63849324268&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/JMNM.24-25.623
DO - 10.4028/www.scientific.net/JMNM.24-25.623
M3 - Artículo
SN - 1422-6375
VL - 24-25
SP - 623
EP - 626
JO - Journal of Metastable and Nanocrystalline Materials
JF - Journal of Metastable and Nanocrystalline Materials
ER -