TY  - JOUR
AU  - Díaz, L.
AU  - Rodríguez, V.D.
AU  - González-Rodríguez, M.
AU  - Rodríguez-Castellón, E.
AU  - Algarra, M.
AU  - Núñez, P.
AU  - Moretti, E.
T1  - M/tio2(m = fe, co, ni, cu, zn) catalysts for photocatalytic hydrogen production under uv and visible light irradiation
LA  - eng
PY  - 2021
SP  - 3491
EP  - 3500
T2  - Inorganic Chemistry Frontiers
SN  - 2052-1553
VL  - 8
IS  - 14
PB  - Royal Society of Chemistry
AB  - In order to improve the photocatalytic response of TiO2 to UV and visible light for hydrogen photoproduction, low cost M/TiO2 semiconductor catalysts were prepared by the impregnation method of five different first row transition metals (M = Fe, Co, Ni, Cu or Zn) on a commercial titania support. The maximum hydrogen production efficiency was achieved for the Cu/TiO2 photocatalyst, with ∼5000 and ∼220 μmol h-1 g-1 H2 production rates for UV and visible irradiation, respectively. Ni/TiO2 and Co/TiO2 also showed a significant photocatalytic activity when UV light was used. The best performing catalyst, Cu/TiO2, was characterized by TEM and XPS measurements. The data showed that Cu was highly dispersed over the TiO2 support and the copper species existed as both reduced Cu0/Cu+ and oxidized Cu2+ on TiO2. Besides, during the hydrogen production reaction, the reduced Cu was partially oxidized to Cu2+ by the transfer of photogenerated holes under UV or visible light irradiation. With UV and visible lamps, the H2 production rates were higher than those obtained with non-impregnated TiO2 by factors of 16 and 3, respectively. These results demonstrated that a Cu/TiO2 photocatalyst could be considered a promising low-cost alternative to the well-known Pt/TiO2 system for hydrogen production, making the Cu-based catalyst an ideal cost-effective candidate for this reaction. This journal is 
DO  - 10.1039/D0QI01311K
UR  - https://portalciencia.ull.es/documentos/610dd3db0f233b05011f6e62
DP  - Dialnet - Portal de la Investigación
ER  -