Direct aerobic oxidation of alcohols into esters catalyzed by carbon nanotube-gold nanohybrids

Continuous Flow Photocatalytic Hydrogen Production from Water Synergistically Activated by TiO2, Gold Nanoparticles, and Carbon Nanotubes

Titanium dioxide nanoparticles were combined with carbon nanotubes and gold to develop improved photocatalysts for the production of hydrogen from water. The entangled nature of the nanotubes allowed for the integration of the photoactive hybrid catalyst, as a packed-bed, in a microfluidic photoreactor, and the chips were studied in the photocatalyzed continuous flow production of hydrogen. The combination of titanium dioxide with carbon nanotubes and gold significantly improved hydrogen production due to a synergistic effect between the multi-component system and the stabilization of the active catalytic species. The titanium dioxide/carbon nanotubes/gold system permitted a 2.5-fold increase in hydrogen production, compared to that of titanium dioxide/carbon nanotubes, and a 20-fold increase, compared to that of titanium dioxide.

Direct integration of gold-carbon nanotube hybrids in continuous-flow microfluidic chips: A versatile approach for nanocatalysis

A carbon nanotube-based packed-bed microreactor was developed for the on-chip oxidation of silanes. The process is catalyzed by a heterogeneous gold-carbon nanotube hybrid that was embedded in the device using a micrometric restriction zone. Integration of the nanohybrid permitted efficient flow aerobic oxidation of the substrates into the corresponding silanols with high selectivity and under sustainable conditions.

Bimetallic ruthenium–rhodium particles supported on carbon nanotubes for the hydrophosphinylation of alkenes and alkynes

RuRh bimetallic particles supported on carbon nanotubes were applied to the hydrophosphinylation of alkenes and alkynes. This recyclable system operates under sustainable conditions: low catalyst loading, room temperature and atmospheric pressure.

Vapor phase catalytic photooxidation of sulfides to sulfoxides: application to the neutralization of sulfur mustard simulants

A visible-light photocatalytic approach was developped for the aerobic oxidation of sulfides into the corresponding sulfoxides, including sulfur mustard simulants. The heterogeneous catalytic system is selective, operates in the gas...

Best practices for reporting nanocatalytic performance: lessons learned from nitroarene reduction as a model reaction

Absent explicit knowledge of catalyst loading, the apparent rate (k_app) is a totally meaningless measure of catalytic activity.

Polyhedral borane-capped coinage metal nanoparticles as high-performing catalysts for 4-nitrophenol reduction

Small (<5 nm) gold and silver nanoparticles and their bimetallic counterparts were prepared using the fundamental boron cluster [closo-B₁₀H₁₀]²⁻ as the reducing and stabilizing agent.

Copper complexes and carbon nanotube–copper ferrite-catalyzed benzenoid A-ring selenation of quinones: an efficient method for the synthesis of trypanocidal agents

A-ring selenation of naphthoquinones and anthraquinones is reported. The reaction proceeds in the presence of a copper source, and provides an efficient and general method for preparing selenium-based quinones with trypanocidal activity.