The Role of a Sn Promoter on an Anodic Pt Electrocatalyst Prepared over H 2 O 2 -Functionalized Carbon Supports for Direct Ethanol Fuel Cell (DEFC) Applications.

Autor: Azcoaga Chort MF; Instituto de Investigaciones en Catálisis y Petroquímica 'Ing. José Miguel Parera' (INCAPE) UNL-CONICET, 3000 -, Santa Fe, Argentina., Stassi JP; Instituto de Investigaciones en Catálisis y Petroquímica 'Ing. José Miguel Parera' (INCAPE) UNL-CONICET, 3000 -, Santa Fe, Argentina., de Miguel SR; Instituto de Investigaciones en Catálisis y Petroquímica 'Ing. José Miguel Parera' (INCAPE) UNL-CONICET, 3000 -, Santa Fe, Argentina., Veizaga NS; Instituto de Investigaciones en Catálisis y Petroquímica 'Ing. José Miguel Parera' (INCAPE) UNL-CONICET, 3000 -, Santa Fe, Argentina., Rodríguez VI; Instituto de Investigaciones en Catálisis y Petroquímica 'Ing. José Miguel Parera' (INCAPE) UNL-CONICET, 3000 -, Santa Fe, Argentina.
Jazyk: angličtina
Zdroj: ChemPlusChem [Chempluschem] 2023 May; Vol. 88 (5), pp. e202300089.
DOI: 10.1002/cplu.202300089
Abstrakt: Multiwalled carbon nanotubes and Vulcan carbon were functionalized with a 30 %v/v hydrogen peroxide solution and employed as supports for Pt and PtSn catalysts prepared by the polyol method. PtSn catalysts with a Pt loading of 20 wt.% and a Pt : Sn atomic ratio equal to 3 : 1 were evaluated in the ethanol electrooxidation reaction. The effects of the oxidizing treatment on the surface area and the surface chemical nature were analyzed through N 2 adsorption, isoelectric point, and temperature-programmed desorption measurements. Results showed that the H 2 O 2 treatment affects the surface area of the carbons to a great extent. Characterization results indicated that the performance of the electrocatalysts strongly depends both on the presence of Sn and on the support functionalization. PtSn/CNT-H 2 O 2 electrocatalyst displays a high electrochemical surface area and enhanced catalytic activity for ethanol oxidation in comparison to other catalysts in the present study.
(© 2023 Wiley-VCH GmbH.)
Databáze: MEDLINE
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