One‐Pot Synthesis of Benzimidazoles by Simultaneous Photocatalytic and Catalytic Reactions on Pt@TiO₂ Nanoparticles

Abstract

Dual platinum action: A one‐pot catalytic synthesis of benzimidazoles from the photoirradiation of an alcohol solution containing an ortho‐arylenediamine and Pt@TiO2 nanoparticles is described. This reaction proceeded by the platinum‐assisted photocatalytic oxidation of an alcohol and a catalytic dehydrogenation of the intermediates on the surface of platinum nanoparticles.

The decoration of TiO2/reduced graphene oxide by Pd and Pt nanoparticles for hydrogen gas sensing

“…As well-known metallic-metal oxide systems, one can mention Pd and Pt/TiO 2 which have many applications for various catalytic reactions such as hydrogen generation [14], CO oxidization [15], and photocatalyst applications [16,17]. Trapping of electrons, catalytic properties of doped TiO 2 and the presence of Schottky barriers in metalemetal oxide interfaces are highlighted factors for wide applications especially in hydrogen gas sensors [18].…”

Co-axial heterostructures integrating palladium/titanium dioxide with carbon nanotubes for efficient electrocatalytic hydrogen evolution

“…On the other end, hydrogen, as carbon-neutral energy vector, is pivotal for fuel cell technology, as primary fuel for generators and engines, and as chemical commodity for some major industrial processes for synthetic fertilizer or hydrocarbon productions. Furthermore, in situ H 2 production provides a greener and safer approach to drive key selective transformations4, including CO 2 reduction for environmental remediation. Therefore, increasing the efficiency of H 2 production using water as the primary source, while offering a broad flexibility of production and delivery conditions, is mandatory to allow a transition to hydrogen-based energy schemes.…”

Semiconductors in Organic Photosynthesis

“…Shiraishi and co-workers investigated a one-pot synthesis of benzimidazoles by simultaneous photocatalytic and catalytic reactions on Pt@TiO 2 nanoparticles (Shiraishi et al, 2010). A number of ortho-arylenediamines were converted to their corresponding benzimidazoles by Pt@TiO 2 catalyzed reaction with different alcohols at 303 K for 30 min under UV irradiation (xenon lamp, 2 kW; light intensity, 18.2 Wm -2 at 300 -400 nm) using, in some cases, MeCN as co-solvent.…”