Comparative study of different carbon-supported Fe2O3-Pt catalysts for oxygen reduction reaction

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,...

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Bibliographic Details
Published in:Environmental science and pollution research international 2017-11, Vol.24 (33), p.25682-25692
Main Authors: Tellez-Cruz, M. M., Padilla-Islas, M. A., Pérez-González, M., Solorza-Feria, O.
Format: Article
Language:English
Subjects:
4th International Symposium on Environmental Biotechnology and Engineering-2014
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Waste Water Technology
Water Management
Water Pollution Control
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Summary: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 Fe 2 O 3 with Pt. Both carbons were functionalized with HNO 3 and subsequently treated with ethanolamine. Fe 2 O 3 nanoparticles were synthesized by chemical reduction and decorated with platinum by epitaxial growth. Pt and Fe 2 O 3 structural phases were identified by XRD and XPS; the Pt content was measured by XPS, and results showed to a high Pt content in Fe 2 O 3 -Pt/FBPC. TEM micrographs reveal nanoparticles with an average size of 2 nm in both supported catalysts. The Fe 2 O 3 -Pt/FVC catalyst presents the highest specific activity and mass activity, 0.21 mA cm −2 Pt and 140 mA mg Pt −1 , respectively, associated to the appropriate distribution of platinum on the Fe 2 O 3 nanoparticles.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-016-7374-x