TY - JOUR
T1 - Kinetic study of oxygen reduction reaction and PEM fuel cell performance of Pt/TiO2-C electrocatalyst
AU - Ruiz-Camacho, B.
AU - Martínez-González, J. H.
AU - González-Huerta, R. G.
AU - Tufiño-Velázquez, M.
N1 - Publisher Copyright:
© 2014 Hydrogen Energy Publications, LLC.
PY - 2014/10/2
Y1 - 2014/10/2
N2 - The electrochemical activity and thermal stability of the Pt/TiO2-C were evaluated in the oxygen reduction reaction (ORR) in acid medium at different temperatures. The platinum was selectively deposited onto the TiO2 (Ebg = 2.3 eV) by the photo-irradiation of platinum precursor (Pt4+→Pt0). The Pt/TiO2-C electrocatalyst prepared was characterized by XRD, TEM/EDS, cyclic and lineal voltammetry techniques. TEM images indicated that platinum nanoparticles (<5 nm) were deposited in agglomerates form around the oxide sites. EDS and XRD results confirm the composition and crystalline structure of Pt/TiO2-C. The thermal stability and electrochemical activity of the Pt/TiO2-C for ORR at different temperatures (298-343 K) is higher than Pt/C commercial sample (Pt-Etek). A more favorable apparent enthalpy of activation for Pt/TiO2-C was greatly influenced by addition of oxide in the catalyst compare to Pt-Etek. Single H2/O2 fuel cell performance results of Pt/TiO2-C show an improvement of the power density with the increase of the temperature.
AB - The electrochemical activity and thermal stability of the Pt/TiO2-C were evaluated in the oxygen reduction reaction (ORR) in acid medium at different temperatures. The platinum was selectively deposited onto the TiO2 (Ebg = 2.3 eV) by the photo-irradiation of platinum precursor (Pt4+→Pt0). The Pt/TiO2-C electrocatalyst prepared was characterized by XRD, TEM/EDS, cyclic and lineal voltammetry techniques. TEM images indicated that platinum nanoparticles (<5 nm) were deposited in agglomerates form around the oxide sites. EDS and XRD results confirm the composition and crystalline structure of Pt/TiO2-C. The thermal stability and electrochemical activity of the Pt/TiO2-C for ORR at different temperatures (298-343 K) is higher than Pt/C commercial sample (Pt-Etek). A more favorable apparent enthalpy of activation for Pt/TiO2-C was greatly influenced by addition of oxide in the catalyst compare to Pt-Etek. Single H2/O2 fuel cell performance results of Pt/TiO2-C show an improvement of the power density with the increase of the temperature.
KW - Enthalpy of activation
KW - Fuel cell performance
KW - Oxygen reduction
KW - Pt/TiO-C
KW - Thermal stability
UR - http://www.scopus.com/inward/record.url?scp=84908068863&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2014.02.109
DO - 10.1016/j.ijhydene.2014.02.109
M3 - Artículo
AN - SCOPUS:84908068863
SN - 0360-3199
VL - 39
SP - 16731
EP - 16739
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 29
ER -