title: Comparative study of different carbon-supported Fe2O3-Pt catalysts for oxygen reduction reaction.
abstract: One of the challenges in electrocatalysis is the adequate dispersion of the catalyst on an appropriate porous support matrix, being up to now the most commonly used the carbon-based supports. To overcome this challenge, carbon supports must first be functionalized to guide the catalyst's nucleation, thereby, improving the dispersion and allowing the use of smaller amount of the catalyst material to achieve a higher electrochemically active surface area. This study present the effect of functionalized Vulcan carbon XC72 (FVC) and functionalized Black Pearl carbon (FBPC) as supports on the catalytic activity of decorated Fe2O3with Pt. Both carbons were functionalized with HNO3and subsequently treated with ethanolamine. Fe2O3nanoparticles were synthesized by chemical reduction and decorated with platinum by epitaxial growth. Pt and Fe2O3structural phases were identified by XRD and XPS; the Pt content was measured by XPS, and results showed to a high Pt content in Fe2O3-Pt/FBPC. TEM micrographs reveal nanoparticles with an average size of 2 nm in both supported catalysts. The Fe2O3-Pt/FVC catalyst presents the highest specific activity and mass activity, 0.21 mA cm-2Ptand 140 mA mgPt-1, respectively, associated to the appropriate distribution of platinum on the Fe2O3nanoparticles.
authors: Departamento de Química, Centro de Investigación y de Estudios Avanzados, CINVESTAV-IPN, Av. IPN 2508, CP 14-740, 07360, Mexico City, Mexico.
authors: M M
authors: MM
authors: Tellez-Cruz
authors: Departamento de Química, Centro de Investigación y de Estudios Avanzados, CINVESTAV-IPN, Av. IPN 2508, CP 14-740, 07360, Mexico City, Mexico.
authors: M A
authors: MA
authors: Padilla-Islas
authors: Departamento de Física, CINVESTAV-IPN, Mexico City, Mexico.
authors: M
authors: M
authors: Pérez-González
authors: Departamento de Química, Centro de Investigación y de Estudios Avanzados, CINVESTAV-IPN, Av. IPN 2508, CP 14-740, 07360, Mexico City, Mexico. osolorza@cinvestav.mx.
authors: O
authors: O
authors: Solorza-Feria
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D004572:Electrolysis; D005290:Ferric Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
chemical_list: D005290:Ferric Compounds; C000499:ferric oxide; D010984:Platinum; D002244:Carbon; D010100:Oxygen
keywords: Black Pearl; Fe2O3-Pt/C catalyst; Nanoalloys; Oxygen reduction reaction; Support; Vulcan XC72