Electrocatalytic property of Zn-Al layered double hydroxides for CO2 electrochemical reduction
[EN] Electrocatalytic CO reduction reaction (CORR) has attracted considerable attention as a technology to recycle carbon dioxide (CO) into raw materials for chemicals using renewable energies. In this study, the electrocatalytic CORR activity of Zn-Al layered double hydroxides (LDHs) was studied. Z...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/343156 |
| Acceso en línea: | http://hdl.handle.net/10261/343156 |
| Access Level: | acceso abierto |
| Palabra clave: | CO2 reduction CO formation Electrocatalyst Layered double hydroxide |
| Sumario: | [EN] Electrocatalytic CO reduction reaction (CORR) has attracted considerable attention as a technology to recycle carbon dioxide (CO) into raw materials for chemicals using renewable energies. In this study, the electrocatalytic CORR activity of Zn-Al layered double hydroxides (LDHs) was studied. Zn-Al LDHs loaded carbon sheets were prepared, and CO RR was performed using CO-saturated KHCO electrolyte to confirm the catalytic ability of Zn-Al LDH. Zn-Al LDHs intercalated with CO anion were synthesized using the mixture of metal nitrates with the different molar ratio of Zn/Al by the co-precipitation process, whose corresponding products were named as ZnAl LDH, ZnAl LDH, and ZnAl LDH, respectively. Except for ZnAl LDH, ZnO was observed to exist as an impurity. The synthesized Zn-Al LDHs exhibited the electrocatalytic CORR activity for CO formation. In the case of the ZnAl LDH, the current density of 15 mA cm was obtained with 77% selectivity for CO and 94% selectivity for (CO + H) at − 1.4 V vs. RHE. Furthermore, ZnAl and ZnAl LDHs showed a significant change relating to ZnO impurities in the XRD patterns and SEM images before and after the CORR whereas ZnAl LDH did not show it. These results indicate that Zn-Al LDH is promising as a CORR electrocatalyst for CO formation. |
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