Recuperação de platina de eletrodos de células a combustível de membrana trocadora de prótons
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Data
2017-12-01
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Universidade Federal de Goiás
Resumo
The used platinum in proton exchange membrane fuel cell electrodes (PEMFC) was
recovered by oxidation at high temperature using a muffle. Four materials with initial
masses of 38.72 grams were prepared. The material was oxidized by acid and then the
platinum concentration was determined by the atomic absorption method. Soon after, by
reduction by sodium borohydride, the obtained metal was reduced to metal platinum on a
carbon surface with high surface area. The material, after filtration and drying, was characterized by X-ray diffraction. The activity for electro-oxidation of hydrogen was
evaluated by cyclic voltammetry in 0.5 mol.L -1 sulfuric acid and in acid solution containing
0,8 mol.L -1 of ethanol. For evaluation of the stability of the material formed chronoamperometry at several potentials for 600 s.
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Palavras-chave
Recuperação , Platina , Células a combustível , Catalisador , Recovery , Platinum , Fuel cells , Catalyst
Citação
SAMPAIO, A. M. B S. Recuperação de platina de eletrodos de células a combustível de membrana trocadora de prótons. 2017. 51 f. Tese (Doutorado em Química) - Universidade Federal de Goiás, Goiânia, 2017.