PEREZ SEQUERA, ANA CRISTINA, DIAZ PEREZ, MANUEL ANTONIO, LARA ANGULO, MAYRA ANABEL, Holgado J.P. , SERRANO RUIZ, JUAN CARLOS
No
Nanomaterials
Article
Científica
4.4
0.798
01/04/2023
000977870800001
2-s2.0-85153962736
In this study, a simple and scalable method to obtain heterogeneous indium nanoparticles and carbon-supported indium nanoparticles under mild conditions is described. Physicochemical characterization by X-ray diffraction (XRD), X-ray photoelectron microscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) revealed heterogeneous morphologies for the In nanoparticles in all cases. Apart from In0, XPS revealed the presence of oxidized In species on the carbon-supported samples, whereas these species were not observed for the unsupported samples. The best-in-class catalyst (In50/C50) exhibited a high formate Faradaic efficiency (FE) near the unit (above 97%) at -1.6 V vs. Ag/AgCl, achieving a stable current density around -10 mA·cmgeo-2, in a common H-cell. While In0 sites are the main active sites for the reaction, the presence of oxidized In species could play a role in the improved performance of the supported samples. © 2023 by the authors.
carbon-supported materials; CO2 conversion; CO2 electroreduction; formate production; heterogeneous catalysts; indium catalysts