title: Electrooxidation of ethylene glycol and glycerol on Pd-(Ni-Zn)/C anodes in direct alcohol fuel cells.
abstract: The electrooxidation of ethylene glycol (EG) and glycerol (G) has been studied: in alkaline media, in passive as well as active direct ethylene glycol fuel cells (DEGFCs), and in direct glycerol fuel cells (DGFCs) containing Pd-(Ni-Zn)/C as an anode electrocatalyst, that is, Pd nanoparticles supported on a Ni-Zn phase. For comparison, an anode electrocatalyst containing Pd nanoparticles (Pd/C) has been also investigated. The oxidation of EG and G has primarily been investigated in half cells. The results obtained have highlighted the excellent electrocatalytic activity of Pd-(Ni-Zn)/C in terms of peak current density, which is as high as 3300 A g(Pd)(-1) for EG and 2150 A g(Pd)(-1) for G. Membrane-electrode assemblies (MEA) have been fabricated using Pd-(Ni-Zn)/C anodes, proprietary Fe-Co/C cathodes, and Tokuyama A-201 anion-exchange membranes. The MEA performance has been evaluated in either passive or active cells fed with aqueous solutions of 5 wt % EG and 5 wt % G. In view of the peak-power densities obtained in the temperature range from 20 to 80 °C, at Pd loadings as low as 1 mg cm(-2) at the anode, these results show that Pd-(Ni-Zn)/C can be classified amongst the best performing electrocatalysts ever reported for EG and G oxidation.
authors: Istituto di Chimica dei Composti Organometallici, Consiglio Nazionale delle Ricerche via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy.
authors: Andrea
authors: A
authors: Marchionni
authors: Manuela
authors: M
authors: Bevilacqua
authors: Claudio
authors: C
authors: Bianchini
authors: Yan-Xin
authors: YX
authors: Chen
authors: Jonathan
authors: J
authors: Filippi
authors: Paolo
authors: P
authors: Fornasiero
authors: Alessandro
authors: A
authors: Lavacchi
authors: Hamish
authors: H
authors: Miller
authors: Lianqin
authors: L
authors: Wang
authors: Francesco
authors: F
authors: Vizza
mesh_terms: D000327:Adsorption; D000438:Alcohols / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D011211:Electric Power Supplies; D004563:Electrochemistry; D004566:Electrodes; D019855:Ethylene Glycol / Q000737:chemistry*; D005990:Glycerol / Q000737:chemistry*; D019216:Metals, Heavy / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry; D009532:Nickel / Q000737:chemistry; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry; D010165:Palladium / Q000737:chemistry; D015032:Zinc / Q000737:chemistry
chemical_list: D000438:Alcohols; D019216:Metals, Heavy; D010165:Palladium; D002244:Carbon; D009532:Nickel; D019855:Ethylene Glycol; D015032:Zinc; D005990:Glycerol; D010100:Oxygen