TY - JOUR
T1 - Carbon nanofiber supports for the preparation of Pt-based metal nanoparticles with high tolerance to sintering
AU - Takenaka, Sakae
AU - Iga, Atsuro
AU - Park, Kayoung
AU - Tanabe, Eishi
AU - Matsune, Hideki
AU - Kishida, Masahiro
N1 - Funding Information:
This study was supported by KAKENHI (Grant-in Aid for Challenging Exploratory Research, Japan Society for the Promotion of Science).
PY - 2013/1/15
Y1 - 2013/1/15
N2 - Fishbone-typed carbon nanofibers (CNFs) that were formed by methane decomposition over silica-supported Ni catalysts were used as catalytic supports for Pt or Pt-Co alloy nanoparticles. The treatment of CNFs with concentrated HNO3 led to the formation of porous structures as well as to the introduction of oxygen-containing functional groups. Pt metal particles of a few nanometers in diameter could be stabilized on the CNFs treated with HNO 3 and showed a high tolerance to sintering at high temperatures, whereas Pt metal particles supported on the CNFs without any treatment were seriously aggregated at high temperatures. The porous structures and functional groups in the CNFs worked as anchoring sites for Pt metal nanoparticles. Thus, Pt-Co alloy particles of a few nanometers in diameter could be prepared by using the CNF support since the CNFs inhibited the sintering of the alloy particles during the treatment at high temperatures to allow for alloy formation.
AB - Fishbone-typed carbon nanofibers (CNFs) that were formed by methane decomposition over silica-supported Ni catalysts were used as catalytic supports for Pt or Pt-Co alloy nanoparticles. The treatment of CNFs with concentrated HNO3 led to the formation of porous structures as well as to the introduction of oxygen-containing functional groups. Pt metal particles of a few nanometers in diameter could be stabilized on the CNFs treated with HNO 3 and showed a high tolerance to sintering at high temperatures, whereas Pt metal particles supported on the CNFs without any treatment were seriously aggregated at high temperatures. The porous structures and functional groups in the CNFs worked as anchoring sites for Pt metal nanoparticles. Thus, Pt-Co alloy particles of a few nanometers in diameter could be prepared by using the CNF support since the CNFs inhibited the sintering of the alloy particles during the treatment at high temperatures to allow for alloy formation.
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U2 - 10.1016/j.apcata.2012.10.015
DO - 10.1016/j.apcata.2012.10.015
M3 - Article
AN - SCOPUS:84872351973
SN - 0926-860X
VL - 450
SP - 211
EP - 221
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
ER -