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Influence of pt/ru anodic ratio on the valorization of ethanol by PEM electrocatalytic reforming towards value-added products

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Journal of Energy Chemistry 2021年第5期30卷 264-275页

作者： Alberto Rodriguez-Gomez Fernando Dorado Antonio de Lucas-Consuegra Ana Raquel de la Osa Chemical Engineering Department Faculty of Chemical Sciences and TechnologyUniversity of Castilla-La Mancha13071 Ciudad RealSpain

The ethanol electro-reforming process was studied over ptru/C catalysts synthesized by the modified polyol method with different *** particular,this work reports the influence of anodic pt:ru ratio(5:1,2:1 and 1:2)on the organic product distribution(acetaldehyde,acetic acid and ethyl acetate)and pure hydrogen generation at different current densities operation *** characterization of the catalysts was made by X-ray diffraction(XRD),temperature-programmed reduction(TPR)and N_(2) adsorption-desorption *** patterns showed that ru is introduced into the pt structure,forming an alloy between both ***,the degree of alloy was higher by increasing the ru *** TPR profiles pt was found to be properly reduced while ru was both in metallic state and forming *** electrochemical behaviour of each catalyst towards ethanol electroreforming process was investigated through electrochemical techniques in a half cell and a single proton exchange membrane(PEM)cell *** intermediate pt:ru ratio was found to result in high current density and electrochemical surface area(ECSA)values along with lower amounts of adsorbed ***,ru addition seems to diminish the degree of degradation of the *** on characterization and in agreement with essays carried out in a PEM cell at mild conditions(80℃ and 1 atm),ptru/C 2:1 anode provided the best electrocatalytic results in terms of current density(740 mA cm^(-2)),hydrogen production and selectivity toward acetic acid(up to 15%apart from acetaldehyde and ethyl acetate)while requiring the lowest energy consumption.

关键词： Ethanol electro-reforming PEM cell pt:ru anodic ratio Hydrogen production Value-added liquid product distribution

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