caa a22 4500 606174419 CHVBK 20210128100738.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s11244-015-0488-4 doi (NATIONALLICENCE)springer-10.1007/s11244-015-0488-4 Electrochemical Activation of Ni Catalysts with Potassium Ionic Conductors for CO2 Hydrogenation [Elektronische Daten] [N. Gutiérrez-Guerra, J. González-Cobos, J. Serrano-Ruiz, J. Valverde, A. de Lucas-Consuegra] Three different kind of Ni-based catalysts were prepared on a K-β″Al2O3 solid electrolyte by combining the annealing of an organometallic paste and the addition of a catalyst powder. The different catalysts films were tested in the CO2 hydrogenation reaction under electrochemical promotion by K+ ions, and were characterized by XRD and SEM. The catalyst film derived from the addition of an α-Al2O3 powder to the Ni catalyst ink presented the highest catalytic activity as a result of the increase in Ni catalyst film porosity. The influence of the applied potential and other operation variables were evaluated on the Ni catalytic activity and selectivity. Hence, the CO production rate was enhanced either by decreasing the applied potential (with the consequent supply of K+ ions to the catalyst surface) or by increasing the CO2 (electron acceptor) feed concentration. On the other hand, CH4 production rate was favoured at positive potentials (removing K+ from the catalyst surface) or by increasing the H2 (electron donor) feed concentration. The global CO2 consumption rate increased upon negative polarization in all experiments and the electrochemical promotion of catalysis effect showed to be reversible and reproducible. Hence, the electrochemical promotion phenomena demonstrated to be a very useful technique to in situ modify and control the catalytic activity and selectivity of a non-noble metal such as Ni for the production of CH4 or syngas via CO2 valorization. Springer Science+Business Media New York, 2015 EPOC nationallicence CO2 removal nationallicence Reverse water gas shift nationallicence Methanation nationallicence Ni catalyst nationallicence Syn-gas nationallicence Gutiérrez-Guerra N. Department of Chemical Engineering, School of Chemical Sciences and Technology, University of Castilla-La Mancha, Avda. Camilo José Cela 12, 13005, Ciudad Real, Spain aut González-Cobos J. Department of Chemical Engineering, School of Chemical Sciences and Technology, University of Castilla-La Mancha, Avda. Camilo José Cela 12, 13005, Ciudad Real, Spain aut Serrano-Ruiz J. Abengoa Research, Abengoa, C/Energía Solar no. 1, Palmas Altas, 41014, Sevilla, Spain aut Valverde J. Department of Chemical Engineering, School of Chemical Sciences and Technology, University of Castilla-La Mancha, Avda. Camilo José Cela 12, 13005, Ciudad Real, Spain aut de Lucas-Consuegra A. Department of Chemical Engineering, School of Chemical Sciences and Technology, University of Castilla-La Mancha, Avda. Camilo José Cela 12, 13005, Ciudad Real, Spain aut Topics in Catalysis Springer US; http://www.springer-ny.com 58/18-20(2015-11-01), 1256-1269 1022-5528 58:18-20<1256 2015 58 11244 https://doi.org/10.1007/s11244-015-0488-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11244-015-0488-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gutiérrez-Guerra N. Department of Chemical Engineering, School of Chemical Sciences and Technology, University of Castilla-La Mancha, Avda. Camilo José Cela 12, 13005, Ciudad Real, Spain aut NATIONALLICENCE 700 1- González-Cobos J. Department of Chemical Engineering, School of Chemical Sciences and Technology, University of Castilla-La Mancha, Avda. Camilo José Cela 12, 13005, Ciudad Real, Spain aut NATIONALLICENCE 700 1- Serrano-Ruiz J. Abengoa Research, Abengoa, C/Energía Solar no. 1, Palmas Altas, 41014, Sevilla, Spain aut NATIONALLICENCE 700 1- Valverde J. Department of Chemical Engineering, School of Chemical Sciences and Technology, University of Castilla-La Mancha, Avda. Camilo José Cela 12, 13005, Ciudad Real, Spain aut NATIONALLICENCE 700 1- de Lucas-Consuegra A. Department of Chemical Engineering, School of Chemical Sciences and Technology, University of Castilla-La Mancha, Avda. Camilo José Cela 12, 13005, Ciudad Real, Spain aut NATIONALLICENCE 773 0- Topics in Catalysis Springer US; http://www.springer-ny.com 58/18-20(2015-11-01), 1256-1269 1022-5528 58:18-20<1256 2015 58 11244