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Preparation of Highly Dispersed Pt on TiO2-Modified Carbon for the Application to Oxygen Reduction Reaction.
- Source :
-
Catalysis Letters . Feb2010, Vol. 134 Issue 3/4, p288-294. 7p. 2 Charts, 7 Graphs. - Publication Year :
- 2010
-
Abstract
- The carbon support (C) is modified by its functionalized surface with Ti species and used as a support of Pt catalyst for oxygen reduction reaction (ORR). Anatase TiO2 nanoparticles with the size of 3–5 nm are uniformly dispersed on the modified carbon support (C-Ti). It is shown that the C-Ti is well dispersed in the solution of Pt precursor due to the hydrophilic TiO2 nanoparticles. This causes a uniform distribution of Pt nanoparticles on C-Ti support. The average particle sizes are 2.9, 2.6, and 3.1 nm, respectively, for Pt/C, Pt/C-Ti, and Pt-commercial. The ORR performance is evaluated in terms of both mass-activity and specific activity. It is found that the Pt/C-Ti revealed the highest performance. The enhancement factors of ORR performance on the Pt/C-Ti at the potentials of 0.75, 0.8, and 0.85 V was more than two for both mass activity and specific activity compared to those on the Pt/C. The large surface area of Pt with a favorable electronic structure would be responsible for a superior performance of the Pt/C-Ti in ORR. Carbon support (C) was modified by reacting Ti species with its functionalized surface and used as a support of Pt catalyst for oxygen reduction reaction (ORR). Due to the hydrophilic TiO2 nanoparticles, the modified support (C-Ti) revealed enhanced dispersion in the solution of Pt precursor, which made Pt nanoparticles highly dispersed on its surface. The enhancement factors of ORR performance on Pt/C-Ti was more than two for both mass activity and specific activity compared to those on the Pt supported on unmodified carbon (Pt/C).[Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]
- Subjects :
- *TITANIUM
*TITANIUM group
*CATALYSTS
*CHEMICAL reduction
*CHEMICAL reactions
Subjects
Details
- Language :
- English
- ISSN :
- 1011372X
- Volume :
- 134
- Issue :
- 3/4
- Database :
- Academic Search Index
- Journal :
- Catalysis Letters
- Publication Type :
- Academic Journal
- Accession number :
- 48110836
- Full Text :
- https://doi.org/10.1007/s10562-009-0235-1