High catalytic activity of Rh nanoparticles generated from cobaltocene and RhCl₃ in aqueous solution

Abstract

Cobalticinium chloride-stabilized RhNPs are very efficient catalysts for hydrolysis of H3N-BH3, reduction of 4-NP, hydrogenation of benzene and transfer hydrogenation.

Water-Soluble Noble Metal Nanoparticle Catalysts Capped with Small Organic Molecules for Organic Transformations in Water

“…Water-soluble cobalticinium chloride-stabilized RhNP catalysts were reported to catalyze the hydrogenation of benzene to cyclohexane in aqueous media. 71 Supported RhNPs on reduced graphene oxide (RhNP/rGO) were also demonstrated for the same reaction. RhNPs and RhNP/rGO produced similar results for the hydrogenation of benzene with 99% conversion yields and TOFs of ∼12.4 h −1 at a slightly elevated temperature (40 °C).…”

“…Cobaticinium chloride (3) has been used for the stabilization of Rh nanoparticles (RhNPs) that were catalytically active for a variety of reactions including ammonia borane hydrolysis, reduction of 4-nitrophenol, transfer hydrogenation, and arene hydrogenation. 71 The active reducing agent for the reduction of RhCl 3 was cobaltocene that is derived from cobaticinium chloride. Glucose (4) was found to reduce Pd(acetate) 2 and protect the resulting Pd nanoparticles in water.…”

“…The direct reduction of metal salts by a reagent that can also act as capping ligands has appeared in the literature many times besides the case of tannic acid. Cobaticinium chloride ( 3 ) has been used for the stabilization of Rh nanoparticles (RhNPs) that were catalytically active for a variety of reactions including ammonia borane hydrolysis, reduction of 4-nitrophenol, transfer hydrogenation, and arene hydrogenation . The active reducing agent for the reduction of RhCl 3 was cobaltocene that is derived from cobaticinium chloride.…”

“…Water-soluble cobalticinium chloride-stabilized RhNP catalysts were reported to catalyze the hydrogenation of benzene to cyclohexane in aqueous media . Supported RhNPs on reduced graphene oxide (RhNP/rGO) were also demonstrated for the same reaction.…”

Magnetic Co-Pd/C Nanocomposites for Hydrogen Evolution upon the Hydrolytic Dehydrogenation of NH3BH3, NaBH4, and Me2NHBH3

“…Since Xu’s group first reported Pt-, Rh-, and Pd-catalyzed H 2 generation from the dissociation and hydrolysis of NH 3 BH 3 in 2006 (eq ), NH 3 BH 3 (AB) has drawn considerable attention because of its ultrahigh H content (up to 19.6 wt %), low molecular weight, superior stability, and solubility in water and eco-friendly characteristics . Over the past few decades, a large number of catalysts, including RuPd, Ag@Pd, Pd, − Ni/ZIF-8, Ni 2 Pt/ZIF-8, CoPt, PdRu, PtPd, Rh, ,, Pt, , Au-Pd@CeO 2 , and Pd/graphene, − have been explored for H 2 production upon AB hydrolysis. − However, there is still a need for increasing the H 2 evolution rates, long-term recyclability, and turnover frequency (TOF) values of the hydrolytic dehydrogenation of NH 3 BH 3 . …”