Boosting hydrogen and chemicals production through ethanol electro-reforming on Pt-transition metal anodes

作     者：Alberto Rodríguez-Gómez Fernando Dorado Paula Sánchez Ana Raquel de la Osa Alberto Rodríguez-Gómez;Fernando Dorado;Paula Sánchez;Ana Raquel de la Osa

作者机构：Chemical Engineering DepartmentFaculty of Chemical Sciences and TechnologyUniversity of Castilla-La Mancha 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第31卷第7期

页      面：394-406,I0011页

核心收录：

学科分类：081702[工学-化学工艺] 0809[工学-电子科学与技术（可授工学、理学学位）] 081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 0703[理学-化学] 

基　　金：We gratefully acknowledge the Spanish Ministry of Science and Innovation(project PID2019-107499RB-100 and FPI grant BES-2017-081181)for the financial support 

主　　题：Ethanol electrochemical reforming Bimetallic anodic electrocatalysts PEM cell High current performance Hydrogen Chemicals production 

摘      要：The aim of this work is to boost the combined hydrogen and added-values compounds generation(acetaldehyde, acetic acid and ethyl acetate) through ethanol electrochemical reforming using bimetallic anodes. In particular, the influence of the secondary metal on the electrochemical performance as well as on the product distribution was studied. For that purpose, Pt X/C electrocatalysts(where X corresponds to Cu, Co, Ni and Ru) were synthesized by the modified polyol method and tested in both half-cell and proton exchange membrane(PEM) cell configurations. Characterization results showed that incorporation of Ni and Co into the Pt matrix enhances the morphological properties of the material, providing smaller crystallite sizes, higher active surface areas and hence, better dispersion when comparing to Ru and Cu-based electrocatalysts. Ethanol oxidation reaction(EOR) was evaluated by cyclic, linear voltammetry and chronopotentiometry assays. Pt Co/C and Pt Ni/C exhibited the highest electrocatalytic activity at high polarization levels, which translate into an improvement of more than 30%(up to 1050 m A cm^(-2)) in the hydrogen production and chemical yields. On the other hand, Pt Ru/C results more advantageous for a lower potential interval(0.85 V) promoting the acetic acid production despite sacrificing ethanol conversion. Pt Cu/C presented the lowest results in both electrochemical performance and product distribution. Such differences in the electrochemical performance can be rationalized in terms of the synergistic effect between both metals(particle size distribution, grade of dispersion and hydrophilic behavior), which demonstrate that the incorporation of a different secondary metal plays an essential role in the EOR development.