INFIQC 05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
artículos
Título:
Niobium-based semiconductor electrodes for hydrogen evolution reaction
Autor/es:
LANTERNA, ANABEL E.; FRANCESCHINI, ESTEBAN A.; HAINER, ANDREW
Revista:
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2019
ISSN:
0360-3199
Resumen:
This contribution centers on the use of Nb-based materials, as substitutes of TiO2, for the preparation of hybrid nickel-semiconductor electrodes for use in the electrochemical generation of hydrogen. The Nb-based semiconductors (i.e., Nb2O5 and Nb3(PO4)5) show good performance for the H2 evolution reaction (HER) using a non-toxic electrolyte (K2CO3) under true water-splitting conditions. In particularly, Nb2O5 shows HER efficiency two-orders-of-magnitude higher than its TiO2 counterparts. Tafel analysis suggests the HER mechanism is the same for all type of electrodes studied and electrochemical impedance spectroscopy indicates these hybrid Ni-semiconductor electrodes are sensitive to light exposure, and prone to act as photoelectrocatalysts.
