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231223s2010 xx |||||o 00| ||eng c |
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|a 10.1021/la100942h
|2 doi
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|a pubmed25n0664.xml
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|a (NLM)20586414
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a Saravanan, Govindachetty
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Pt3Ti nanoparticles
|b fine dispersion on SiO2 supports, enhanced catalytic CO oxidation, and chemical stability at elevated temperatures
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|c 2010
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 30.09.2010
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|a Date Revised 30.06.2010
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a A platinum-based intermetallic phase with an early d-metal, Pt(3)Ti, has been synthesized in the form of nanoparticles (NPs) dispersed on silica (SiO(2)) supports. The organometallic Pt and Ti precursors, Pt(1,5-cyclooctadiene)Cl(2) and TiCl(4)(tetrahydrofuran)(2), were mixed with SiO(2) and reduced by sodium naphthalide in tetrahydrofuran. Stoichiometric Pt(3)Ti NPs with an average particle size of 2.5 nm were formed on SiO(2) (particle size: 20-200 nm) with an atomically disordered FCC-type structure (Fm3m; a = 0.39 nm). A high dispersivity of Pt(3)Ti NPs was achieved by adding excessive amounts of SiO(2) relative to the Pt precursor. A 50-fold excess of SiO(2) resulted in finely dispersed, SiO(2)-supported Pt(3)Ti NPs that contained 0.5 wt % Pt. The SiO(2)-supported Pt(3)Ti NPs showed a lower onset temperature of catalysis by 75 degrees C toward the oxidation reaction of CO than did SiO(2)-supported pure Pt NPs with the same particle size and Pt fraction, 0.5 wt %. The SiO(2)-supported Pt(3)Ti NPs also showed higher CO conversion than SiO(2)-supported pure Pt NPs even containing a 2-fold higher weight fraction of Pt. The SiO(2)-supported Pt(3)Ti NPs retained their stoichiometric composition after catalytic oxidation of CO at elevated temperatures, 325 degrees C. Pt(3)Ti NPs show promise as a catalytic center of purification catalysts for automobile exhaust due to their high catalytic activity toward CO oxidation with a low content of precious metals
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|a Journal Article
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1 |
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|a Abe, Hideki
|e verfasserin
|4 aut
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| 700 |
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|a Xu, Ya
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sekido, Nobuaki
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hirata, Hirohito
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Matsumoto, Shin-ichi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yoshikawa, Hideki
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yamabe-Mitarai, Yoko
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1991
|g 26(2010), 13 vom: 06. Juli, Seite 11446-51
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:26
|g year:2010
|g number:13
|g day:06
|g month:07
|g pages:11446-51
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| 856 |
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|u http://dx.doi.org/10.1021/la100942h
|3 Volltext
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