TY - JOUR
T1 - Effect of ultrasonic irradiation on carbon-supported Pt-Ru nanoparticles prepared at high metal concentration
AU - Nagao, Daisuke
AU - Shimazaki, Yuzuru
AU - Saeki, Shu
AU - Kobayashi, Yoshio
AU - Konno, Mikio
N1 - Funding Information:
This research was partially supported by the Ministry of Education, Culture, Sports, Science and Technology through a Grant-in-Aid for COE project Giant molecules and Complex Systems, and by the Grant-in-Aid for R&D for Practical Application Utilizing the Matching Fund Method, from New Energy and Industrial Technology Development Organization.
PY - 2007/7/20
Y1 - 2007/7/20
N2 - Effect of ultrasonic irradiation during the preparation of carbon-supported Pt-Ru nanoparticles was studied to obtain the aqueous dispersion of catalyst at higher concentrations. The nanoparticles formed through the reduction of Pt and Ru ions with sodium borohydride were impregnated on carbon powder (Vulcan XC72R). TEM observation revealed that the sample prepared with ultrasonic irradiation had single-nanometer-sized Pt-Ru particles on the carbon support, while aggregated Pt-Ru particles were observed in the non-irradiated sample. Methanol oxidation current for the catalysts prepared under ultrasonic irradiation was higher than that for the catalysts prepared without irradiation. This promotive effect of ultrasonic irradiation on the catalytic activity was also confirmed at concentrations of Pt, Ru and carbon support as high as 3.0 mM, 1.2 mM, and 1065 mg/l, respectively.
AB - Effect of ultrasonic irradiation during the preparation of carbon-supported Pt-Ru nanoparticles was studied to obtain the aqueous dispersion of catalyst at higher concentrations. The nanoparticles formed through the reduction of Pt and Ru ions with sodium borohydride were impregnated on carbon powder (Vulcan XC72R). TEM observation revealed that the sample prepared with ultrasonic irradiation had single-nanometer-sized Pt-Ru particles on the carbon support, while aggregated Pt-Ru particles were observed in the non-irradiated sample. Methanol oxidation current for the catalysts prepared under ultrasonic irradiation was higher than that for the catalysts prepared without irradiation. This promotive effect of ultrasonic irradiation on the catalytic activity was also confirmed at concentrations of Pt, Ru and carbon support as high as 3.0 mM, 1.2 mM, and 1065 mg/l, respectively.
KW - Carbon-support
KW - Methanol oxidation current
KW - Nanoparticle
KW - Pt-Ru
KW - Ultrasound
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U2 - 10.1016/j.colsurfa.2007.02.022
DO - 10.1016/j.colsurfa.2007.02.022
M3 - Article
AN - SCOPUS:34248212687
VL - 302
SP - 623
EP - 627
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
SN - 0927-7757
IS - 1-3
ER -