SEARCH · Engineering Papers
Results for “TiO”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Theoretical Insights into H 2 Activation over Anatase TiO 2 Supported Metal Adatoms
Not provided.
Caged-Cation-Induced Lattice Distortion in Bronze TiO[subscript 2] for Cohering Nanoparticulate Hydr
Explore the source record for details and available documents.
Nanocavity-Mediated Purcell Enhancement of Er in TiO 2 Thin Films Grown via Atomic Layer Deposition
Not Available
Direct In Situ Measurement of Quantum Efficiencies of Charge Separation and Proton Reduction at TiO 2 -Protected GaP Photocathodes
Not Available
Charge Transfer Mechanism on a Cobalt-Polyoxometalate-TiO 2 Photoanode for Water Oxidation in Acid
Not Available
CO Adsorbate Promotes Polaron Photoactivity on the Reduced Rutile TiO 2 (110) Surface
Not Available
Redox Dynamics of Active VO x Sites Promoted by TiO x during Oxidative Dehydrogenation of Ethanol Detected by Operando Quick XAS
Not Available
Activating low-temperature diesel oxidation by single-atom Pt on TiO 2 nanowire array
Supported metal single atom catalysts (SACs) present an emerging class of low-temperature catalysts with high reactivity and selectivity, which, however, face challenges on both durability and practicality. Herein, we report a single-atom Pt catalyst that is strongly anchored on a robust nanowire forest of mesoporous rutile titania grown on the channeled walls of full-size cordierite honeycombs. This Pt SAC exhibits remarkable activity for oxidation of CO and hydrocarbons with 90% conversion at temperatures as low as ~160 °C under simulated diesel exhaust conditions while using 5 times less Pt-group metals than a commercial oxidation catalyst. Such an excellent low-temperature performance is sustained over hydrothermal aging and sulfation as a result of highly dispersed and isolated active single Pt ions bonded at the Ti vacancy sites with 5 or 6 oxygen ions on titania nanowire surfaces.
Effects of oxygen vacancies on the photoexcited carrier lifetime in rutile TiO 2
The photoexcited carrier lifetime in semiconductors plays a crucial role in solar energy conversion processes.
Synthesis of TiO 2 nanotube arrays on 3D-printed structures for application as Fischer–Tropsch synthesis catalysts
3D-printed FeCo/TiO 2 nanotube catalysts are used for the first time in Fischer–Tropsch synthesis and demonstrate considerable catalytic activity.
Cobalt promotion of the InO x –TiO 2 heterojunction for dual photothermal reduction of CO 2
A series of cobalt-promoted indium–titanium composite oxides was synthesized using a microemulsion method. Their functional properties were investigated for the photothermal reduction of carbon dioxide. In this series, the indium content varied between 2.5 and 20%, while the cobalt percentage was kept constant at 4% throughout the series. In all cases, carbon monoxide formation occurred selectively through the reverse water gas shift reaction. The sample with 2.5% In maximized the synergistic use of the two energy sources, while the sample with 10% In showed the highest catalytic activity under both thermal and dual photo-thermo conditions. A physicochemical characterization was performed for all samples. The use of microscopy and X-ray absorption spectroscopy demonstrated that sub-nanometric indium entities, in combination with atomically dispersed cobalt oxide entities, achieved a balance between high thermal activity and significant synergy between light and heat in a catalytic process. The system with 10% indium is thus able to improve the thermal catalytic process through the use of light, providing an intensification procedure for the classic process.