Oxygen reduction performance of Pt/TiO <inf>2</inf>-c electrocatalyst prepared by two-step chemical vapor deposition

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Abstract

The low durability of Pt/C electro-catalysts in polymer electrolyte membrane fuel cells (PEMFC), e.g., as a result of carbon oxidation to CO 2 in an acid medium, has been recognized as one of the most important hindrances to long-term stability. In this work, Pt electrocatalysts supported on TiO 2-carbon and Vulcan carbon were prepared by the chemical vapor deposition method. The physical and electrochemical properties of Pt/TiO 2-C and Pt/C electrocatalysts were investigated by the characterization techniques of XRD, TEM, CO stripping and cyclic and linear voltammetry. The prepared materials were electrochemically evaluated in the oxygen reduction reaction (ORR) in an acid medium at room temperature. The XRD results show crystalline fcc platinum formation. The mean particle size is between 2 and 4 nm with a spherical morphology. Pt/TiO 2-C electrocatalysts showed a higher electrochemical active surface area and better activity results for the ORR compared with the Pt/C samples. The addition of TiO 2 to the conventional Pt/C catalyst modifies the electronic properties affecting the oxygen adsorption and improving the catalytic activity for the oxygen reduction reaction. © J. New Mat. Electrochem. Systems.
Original languageAmerican English
Pages (from-to)123-128
Number of pages110
JournalJournal of New Materials for Electrochemical Systems
StatePublished - 28 Jun 2012
Externally publishedYes

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Electrocatalysts
Chemical vapor deposition
Oxygen
Carbon
Carbon Monoxide
Catalysts
Acids
Proton exchange membrane fuel cells (PEMFC)
Voltammetry
Platinum
Electrochemical properties
Particle Size
Electronic properties
Electrolytes
Adsorption
Catalyst activity
Polymers
Durability
Physical properties
Particle size

Cite this

@article{211280f145f44dbd9e6630066e9a941c,
title = "Oxygen reduction performance of Pt/TiO 2-c electrocatalyst prepared by two-step chemical vapor deposition",
abstract = "The low durability of Pt/C electro-catalysts in polymer electrolyte membrane fuel cells (PEMFC), e.g., as a result of carbon oxidation to CO 2 in an acid medium, has been recognized as one of the most important hindrances to long-term stability. In this work, Pt electrocatalysts supported on TiO 2-carbon and Vulcan carbon were prepared by the chemical vapor deposition method. The physical and electrochemical properties of Pt/TiO 2-C and Pt/C electrocatalysts were investigated by the characterization techniques of XRD, TEM, CO stripping and cyclic and linear voltammetry. The prepared materials were electrochemically evaluated in the oxygen reduction reaction (ORR) in an acid medium at room temperature. The XRD results show crystalline fcc platinum formation. The mean particle size is between 2 and 4 nm with a spherical morphology. Pt/TiO 2-C electrocatalysts showed a higher electrochemical active surface area and better activity results for the ORR compared with the Pt/C samples. The addition of TiO 2 to the conventional Pt/C catalyst modifies the electronic properties affecting the oxygen adsorption and improving the catalytic activity for the oxygen reduction reaction. {\circledC} J. New Mat. Electrochem. Systems.",
author = "{Gonz{\'a}lez Huerta}, {R. G.} and Valenzuela, {M. A.} and {Vargas Garc{\'i}a}, R. and N. Alonso-Vante and {Tufi{\~n}o Vel{\'a}zquez}, M. and B. Ruiz-Camacho",
year = "2012",
month = "6",
day = "28",
language = "American English",
pages = "123--128",
journal = "Journal of New Materials for Electrochemical Systems",
issn = "1480-2422",
publisher = "Ecole Polytechnique de Montreal",

}

TY - JOUR

T1 - Oxygen reduction performance of Pt/TiO 2-c electrocatalyst prepared by two-step chemical vapor deposition

AU - González Huerta, R. G.

AU - Valenzuela, M. A.

AU - Vargas García, R.

AU - Alonso-Vante, N.

AU - Tufiño Velázquez, M.

AU - Ruiz-Camacho, B.

PY - 2012/6/28

Y1 - 2012/6/28

N2 - The low durability of Pt/C electro-catalysts in polymer electrolyte membrane fuel cells (PEMFC), e.g., as a result of carbon oxidation to CO 2 in an acid medium, has been recognized as one of the most important hindrances to long-term stability. In this work, Pt electrocatalysts supported on TiO 2-carbon and Vulcan carbon were prepared by the chemical vapor deposition method. The physical and electrochemical properties of Pt/TiO 2-C and Pt/C electrocatalysts were investigated by the characterization techniques of XRD, TEM, CO stripping and cyclic and linear voltammetry. The prepared materials were electrochemically evaluated in the oxygen reduction reaction (ORR) in an acid medium at room temperature. The XRD results show crystalline fcc platinum formation. The mean particle size is between 2 and 4 nm with a spherical morphology. Pt/TiO 2-C electrocatalysts showed a higher electrochemical active surface area and better activity results for the ORR compared with the Pt/C samples. The addition of TiO 2 to the conventional Pt/C catalyst modifies the electronic properties affecting the oxygen adsorption and improving the catalytic activity for the oxygen reduction reaction. © J. New Mat. Electrochem. Systems.

AB - The low durability of Pt/C electro-catalysts in polymer electrolyte membrane fuel cells (PEMFC), e.g., as a result of carbon oxidation to CO 2 in an acid medium, has been recognized as one of the most important hindrances to long-term stability. In this work, Pt electrocatalysts supported on TiO 2-carbon and Vulcan carbon were prepared by the chemical vapor deposition method. The physical and electrochemical properties of Pt/TiO 2-C and Pt/C electrocatalysts were investigated by the characterization techniques of XRD, TEM, CO stripping and cyclic and linear voltammetry. The prepared materials were electrochemically evaluated in the oxygen reduction reaction (ORR) in an acid medium at room temperature. The XRD results show crystalline fcc platinum formation. The mean particle size is between 2 and 4 nm with a spherical morphology. Pt/TiO 2-C electrocatalysts showed a higher electrochemical active surface area and better activity results for the ORR compared with the Pt/C samples. The addition of TiO 2 to the conventional Pt/C catalyst modifies the electronic properties affecting the oxygen adsorption and improving the catalytic activity for the oxygen reduction reaction. © J. New Mat. Electrochem. Systems.

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