Glycerol electrooxidation in alkaline medium using Pd/C, Au/C and PdAu/C electrocatalysts prepared by electron beam irradiation

Journal of the Brazilian Chemical Society

Geraldes, Adriana N.¹  Spinacé, Estevam V.¹  O. Neto, Almir¹  Silva, Dionisio F.¹  Santos, Mauro C.¹  Silva, Júlio C. M.¹  Souza, Rodrigo F. B.¹  Instituto de Pesquisas Energéticas e Nucleares, São Paulo, Brazil¹  Linardi, Marcelo¹  Universidade Federal do ABC, Santo André, Brazil¹ 

关键词: alkaline fuel cell;    glycerol;    Pd/C;    PdAu/C;    electrocatalysts;   

DOI  :  10.5935/0103-5053.20140044

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

Pd/C, Au/C and PdAu/C electrocatalysts with different atomic ratios prepared using electron beam irradiation were tested for glycerol electrooxidation in single alkaline direct glycerol fuel cell (ADGFC). X-ray diffractograms (XRD) of PdAu/C electrocatalysts showed the presence of Pd (fcc) and Au (fcc) phases. Cyclic voltammetry (CV) and chronoamperometry showed that PdAu/C electrocatalyst with Pd:Au atomic ratio of 50:50 demonstrated superior activity for glycerol electrooxidation, at room temperature. In situ Fourier transform infrared spectroscopy by attenuated total reflectance (ATR-FTIR) experiments were performed for the electrocatalysts, identifying oxalate, glycerate ion, 1,3-dihydroxy-2-propanone, glyceraldehyde and glycolate as products of glycerol electrooxidation. Experiments with single ADGFC were carried out from 50 to 90 ºC, using Pd/C electrocatalyst; the best performance was obtained at 80 ºC.

【 授权许可】

Unknown