Visible Light-Driven H₂ Production over Highly Dispersed Ruthenia on Rutile TiO₂ Nanorods

Abstract

The immobilization of miniscule quantities of RuO2 (~ 0.1%) onto one-dimensional (1D) TiO2 nanorods (NRs) allows H2 evolution from water under the irradiation of visible light.Rod-like rutile TiO2 structures, exposing preferentially (110) surfaces, are shown to be critical for the deposition of RuO2 to enable photocatalytic activity in the visible region. This performance is rationalized based on fundamental experimental studies and theoretical calculations, demonstrating that RuO2(110) grown as 1D nanowires on rutile TiO2(110), which occurs only at extremely low loads of RuO2, leads to the formation of a heterointerface that efficiently adsorbs visible light.

Engineering oxygen vacancy on rutile TiO2 for efficient electron-hole separation and high solar-driven photocatalytic hydrogen evolution

“…Rutile TiO 2 is suitable for photocatalytic water splitting due to its appropriate band energy position. The photocatalytic activity of rutile TiO 2 is usually low mainly due to the less surface active sites and the high recombination rate of photogenerated electron-hole pairs [19][20][21], although some researchers obtained rutile TiO 2 with excellent photocatalytic performance by designing and controlling suitable structure [19,20]. Moreover, rutile TiO 2 absorbs only ultraviolet light due to the wide bandgap (~3.0 eV), which represents a small fraction of solar energy and limits the efficiency of solar-driven photocatalysis greatly [22].…”

Ruthenium oxide/tungsten oxide composite nanofibers as anode catalysts for the green energy generation of Chlorella vulgaris mediated biophotovoltaic cells

“…The intimate interaction and contact between the two metal oxides prevents the aggregation of distinct RuO 2 nanoparticles and preserves the larger exposed area for a couple of cycles. 38,48 The strongly inter- Thus these findings provided the compatible pathways for the direct photosynthetic electron harvesting mechanistic pathways for the effectual green energy generation from the renewable solar energy resources.…”

“…The electrons produced under the illumination conditions are transferred to the conduction band of RuO 2 via the electroactive protein located over the microalgae surface. The intraband transition and localized surface plasmon resonance of RuO 2 nanofibers govern the effectual photochemical activity as reflected from the improved BPV performance . The BPV with RuO 2 /WO 3 /CC demonstrates the improved fuel cell current and power densities, respectively, of 1,177.30 mA/m 2 and 59.2 mW/m 2 , which is almost twofold higher than those of RuO 2 /CC due to the morphological and structural influences of prepared composite fibers.…”

“…Upon the illumination conditions, the OCV is increased to a maximum value of 0.416 V, which is substantially higher than those of other studied CCs and exhibits a lower decrement in the dark regime. The intimate interaction and contact between the two metal oxides prevents the aggregation of distinct RuO 2 nanoparticles and preserves the larger exposed area for a couple of cycles . The strongly interconnected nanofibers confer the stiffer and prominent physical stability to the modified electrode and the electrostatic interface of the RuO 2 /WO 3 and microalgae lead to the established colonization at the interconnected nanofibers .…”

High catalytic efficiency of Pd nanoparticles immobilized on TiO2 nanorods‐coated ceramic membranes

“…In consideration of the advantages of nano‐coating technology, the membrane catalysts with high catalytic performance may be achieved with the help of nano‐coating modification. To date, TiO 2 nanorods (NRs) have been paid much attention because of their outstanding characteristics including excellent chemical stability and low product cost . However, to the best of our knowledge, there is no report on the synthesis of membrane catalysts based on the modification with TiO 2 NRs.…”