Synthesis and characterization Pt nanocatalysts on tungsten based supports for oxygen reduction reaction
| Autor: | N.V. Krstajić, Biljana Babić, N.R. Elezović, Lj.M. Vračar, Velimir Radmilovic, Peter Ercius |
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| Rok vydání: | 2012 |
| Předmět: |
Pt/WC catalyst
Materials science Inorganic chemistry chemistry.chemical_element Nanoparticle 02 engineering and technology Tungsten 010402 general chemistry Borohydride 01 natural sciences Catalysis Oxygen reduction reaction chemistry.chemical_compound Acid solution General Environmental Science Process Chemistry and Technology Tungsten based support 021001 nanoscience & nanotechnology Nanomaterial-based catalyst 0104 chemical sciences chemistry Linear sweep voltammetry Cyclic voltammetry 0210 nano-technology Platinum |
| Zdroj: | Applied Catalysis. B: Environmental |
| ISSN: | 0926-3373 |
| DOI: | 10.1016/j.apcatb.2012.06.008 |
| Popis: | Platinum nanocatalysts on two tungsten based supports have been synthesized and characterized as catalysts for oxygen reduction reaction in 0.5 mol dm −3 HClO 4 solution, at 25 °C. Tungsten based support assigned WCctabr has been synthesized by polycondensation of resorcinol and formaldehyde in the presence of CTABr surfactant. Support assigned WC WO 3 was synthesized from resorcinol/formaldehyde gel, using WO 3 nanoparticles as starting material. Supporting materials have been characterized by BET (Brunauer, Emmett and Teller) technique and determined values of surface area were 80 m 2 g −1 for WCctabr and 175 m 2 g −1 for WC WO 3 . Platinum nanocatalysts (10% Pt) at tungsten based supports have been prepared by borohydride reduction method. Both synthesized supports and catalysts have been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and electron energy loss spectroscopy (EELS) techniques. Cyclic voltammetry was applied for determination of electrochemically active surface area (40 m 2 g −1 for Pt/WC WO 3 and 55 m 2 g −1 for Pt/WCctabr). Oxygen reduction reaction has been studied by cyclic voltammetry and linear sweep voltammetry at rotating disc electrode (RDE). These catalysts exhibited better catalytic activity, expressed in terms of kinetic current density per real surface area at the constant potential and better stability, in comparison with Pt/C catalyst, as well as with already reported catalytic activity values for Pt catalysts on tungsten based supports. |
| Databáze: | OpenAIRE |
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