Health & Environmental Research Online (HERO)


Print Feedback Export to File
1589142 
Journal Article 
Preparation of Highly Dispersed Pt on TiO2-Modified Carbon for the Application to Oxygen Reduction Reaction 
Beak, S; Jung, D; Nahm, KS; Kim, P 
2010 
Yes 
Catalysis Letters
ISSN: 1011-372X
EISSN: 1572-879X 
134 
3-4 
288-294 
WOS:000274615400014 
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. 
Modification of carbon support; Titanium dioxide; Fuel cells; Oxygen reduction reaction; Pt catalyst; Polymer electrolyte fuel cells