Kinetic study of oxygen reduction reaction and PEM fuel cell performance of Pt/TiO2-C electrocatalyst

B. Ruiz-Camacho; J. H. Martínez-González; R. G. González-Huerta; M. Tufiño-Velázquez

doi:10.1016/j.ijhydene.2014.02.109

Kinetic study of oxygen reduction reaction and PEM fuel cell performance of Pt/TiO₂-C electrocatalyst

B. Ruiz-Camacho, J. H. Martínez-González, R. G. González-Huerta, M. Tufiño-Velázquez

Escuela Superior de Física y Matemáticas (ESFM)

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

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 (E_bg = 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.

Translated title of the contribution	Estudio cinético de la reacción de reducción de oxígeno y rendimiento de celdas de combustible PEM del electrocatalizador Pt/TiO 2 -C
Original language	English
Pages (from-to)	16731-16739
Number of pages	9
Journal	International Journal of Hydrogen Energy
Volume	39
Issue number	29
DOIs	https://doi.org/10.1016/j.ijhydene.2014.02.109
State	Published - 2 Oct 2014

Keywords

Enthalpy of activation
Fuel cell performance
Oxygen reduction
Pt/TiO-C
Thermal stability

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10.1016/j.ijhydene.2014.02.109

Cite this

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title = "Kinetic study of oxygen reduction reaction and PEM fuel cell performance of Pt/TiO2-C electrocatalyst",

abstract = "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.",

keywords = "Enthalpy of activation, Fuel cell performance, Oxygen reduction, Pt/TiO-C, Thermal stability",

author = "B. Ruiz-Camacho and Mart{\'i}nez-Gonz{\'a}lez, {J. H.} and Gonz{\'a}lez-Huerta, {R. G.} and M. Tufi{\~n}o-Vel{\'a}zquez",

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AU - Ruiz-Camacho, B.

AU - Martínez-González, J. H.

AU - González-Huerta, R. G.

AU - Tufiño-Velázquez, M.

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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.

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