Electrochemical promotion and characterization of PdZn alloy catalysts with K and Na ionic conductors for pure gaseous CO2 hydrogenation

A PdZn alloy has been used for the first time as a catalytic electrochemical film for CO2 hydrogenation. Three different electrochemical systems were prepared to study the influence of the Pd/Zn ratio and the presence of potassium and sodium ions. These catalysts were characterized by XRD, SEM and c...

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Autores: Díez Ramírez, Javier, Sánchez Paredes, Paula, Valverde, Jose Luis, Dorado Fernández, Fernando
Tipo de recurso: artículo
Fecha de publicación:2016
País:España
Institución:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/29883
Acceso en línea:http://hdl.handle.net/10578/29883
Access Level:acceso abierto
Palabra clave:Electrochemical promotion of catalysis (EPOC)
CO2 hydrogenation
PdZn alloy
Methanol production
Promoción electroquímica de la catálisis (EPOC)
Hidrogenación de CO2
Aleación de pdzn
Producción de metanol
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spelling Electrochemical promotion and characterization of PdZn alloy catalysts with K and Na ionic conductors for pure gaseous CO2 hydrogenationDíez Ramírez, JavierSánchez Paredes, PaulaValverde, Jose LuisDorado Fernández, FernandoElectrochemical promotion of catalysis (EPOC)CO2 hydrogenationPdZn alloyMethanol productionPromoción electroquímica de la catálisis (EPOC)Hidrogenación de CO2Aleación de pdznProducción de metanolA PdZn alloy has been used for the first time as a catalytic electrochemical film for CO2 hydrogenation. Three different electrochemical systems were prepared to study the influence of the Pd/Zn ratio and the presence of potassium and sodium ions. These catalysts were characterized by XRD, SEM and cyclic voltammetry and then tested in the hydrogenation of CO2 at three different H2/CO2 feed ratios (3, 9 and 39) and three temperatures (300, 320 and 340 °C) with electrochemical promotion by Na+ and K+ ions. CH3OH and CO were the only two products detected. During the electrochemical promotion, a low quantity of ions increases the formation rate of CH3OH and a high quantity leads to the poisoning of the PdZn active sites. The catalysts which have palladium and the palladium-zinc alloy in their structure show an electrophilic behavior in the CO formation and when only the alloy is formed in the catalyst, the CO has the same behavior found for the methanol. Apparent Faradaic efficiency values above 1000 were obtained under the different conditions tested.Se ha utilizado por primera vez una aleación de PdZn como película electroquímica catalítica para la hidrogenación de CO2. Se prepararon tres sistemas electroquímicos diferentes para estudiar la influencia de la relación Pd/Zn y la presencia de iones de potasio y sodio. Estos catalizadores fueron caracterizados por XRD, SEM y voltamperometría cíclica y luego probados en la hidrogenación de CO 2 a tres relaciones de alimentación H 2 /CO 2 diferentes (3, 9 y 39) y tres temperaturas (300, 320 y 340 °C) con promoción electroquímica por iones Na + y K + . Canal 3OH y CO fueron los dos únicos productos detectados. Durante la promoción electroquímica, una cantidad baja de iones aumenta la tasa de formación de CH 3 OH y una cantidad alta conduce al envenenamiento de los sitios activos de PdZn. Los catalizadores que tienen paladio y la aleación de paladio-zinc en su estructura muestran un comportamiento electrofílico en la formación de CO y cuando solo se forma la aleación en el catalizador, el CO tiene el mismo comportamiento encontrado para el metanol. Se obtuvieron valores aparentes de eficiencia Faradaica por encima de 1000 bajo las diferentes condiciones ensayadas.Elsevier202220222016info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttp://hdl.handle.net/10578/29883reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésinfo:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/298832026-05-27T07:36:41Z
dc.title.none.fl_str_mv Electrochemical promotion and characterization of PdZn alloy catalysts with K and Na ionic conductors for pure gaseous CO2 hydrogenation
title Electrochemical promotion and characterization of PdZn alloy catalysts with K and Na ionic conductors for pure gaseous CO2 hydrogenation
spellingShingle Electrochemical promotion and characterization of PdZn alloy catalysts with K and Na ionic conductors for pure gaseous CO2 hydrogenation
Díez Ramírez, Javier
Electrochemical promotion of catalysis (EPOC)
CO2 hydrogenation
PdZn alloy
Methanol production
Promoción electroquímica de la catálisis (EPOC)
Hidrogenación de CO2
Aleación de pdzn
Producción de metanol
title_short Electrochemical promotion and characterization of PdZn alloy catalysts with K and Na ionic conductors for pure gaseous CO2 hydrogenation
title_full Electrochemical promotion and characterization of PdZn alloy catalysts with K and Na ionic conductors for pure gaseous CO2 hydrogenation
title_fullStr Electrochemical promotion and characterization of PdZn alloy catalysts with K and Na ionic conductors for pure gaseous CO2 hydrogenation
title_full_unstemmed Electrochemical promotion and characterization of PdZn alloy catalysts with K and Na ionic conductors for pure gaseous CO2 hydrogenation
title_sort Electrochemical promotion and characterization of PdZn alloy catalysts with K and Na ionic conductors for pure gaseous CO2 hydrogenation
dc.creator.none.fl_str_mv Díez Ramírez, Javier
Sánchez Paredes, Paula
Valverde, Jose Luis
Dorado Fernández, Fernando
author Díez Ramírez, Javier
author_facet Díez Ramírez, Javier
Sánchez Paredes, Paula
Valverde, Jose Luis
Dorado Fernández, Fernando
author_role author
author2 Sánchez Paredes, Paula
Valverde, Jose Luis
Dorado Fernández, Fernando
author2_role author
author
author
dc.subject.none.fl_str_mv Electrochemical promotion of catalysis (EPOC)
CO2 hydrogenation
PdZn alloy
Methanol production
Promoción electroquímica de la catálisis (EPOC)
Hidrogenación de CO2
Aleación de pdzn
Producción de metanol
topic Electrochemical promotion of catalysis (EPOC)
CO2 hydrogenation
PdZn alloy
Methanol production
Promoción electroquímica de la catálisis (EPOC)
Hidrogenación de CO2
Aleación de pdzn
Producción de metanol
description A PdZn alloy has been used for the first time as a catalytic electrochemical film for CO2 hydrogenation. Three different electrochemical systems were prepared to study the influence of the Pd/Zn ratio and the presence of potassium and sodium ions. These catalysts were characterized by XRD, SEM and cyclic voltammetry and then tested in the hydrogenation of CO2 at three different H2/CO2 feed ratios (3, 9 and 39) and three temperatures (300, 320 and 340 °C) with electrochemical promotion by Na+ and K+ ions. CH3OH and CO were the only two products detected. During the electrochemical promotion, a low quantity of ions increases the formation rate of CH3OH and a high quantity leads to the poisoning of the PdZn active sites. The catalysts which have palladium and the palladium-zinc alloy in their structure show an electrophilic behavior in the CO formation and when only the alloy is formed in the catalyst, the CO has the same behavior found for the methanol. Apparent Faradaic efficiency values above 1000 were obtained under the different conditions tested.
publishDate 2016
dc.date.none.fl_str_mv 2016
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10578/29883
url http://hdl.handle.net/10578/29883
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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