Gold–Organic–Inorganic High‐Surface‐Area Materials as Precursors of Highly Active Catalysts

Abstract

In Table 1 of this Communication, data for three catalysts used for comparison purposes were calculated erroneously. Thus, for the catalysts MCM-41, MCM-48, and SBA-15 (last three entries in Table 1), specific rates of 0.62, 0.35, and 0.47 mol CO g Au À1 h À1 , respectively, are obtained at T = 80 8C and a contact time of 23 g cat h mol CO À1. These catalysts are at least 3.3 times less active than the presented gold nanoparticle catalyst at a reaction temperature of 80 8C.

Novel embedded Pd@CeO2catalysts: a way to active and stable catalysts

“…Pd particles were first acidified until pH~5 by means of conc. HNO 3 . Following the addition of an aqueous solution (100 mL) of the acidified Pd nanoparticles and Ce(NO 3 ) 3 ·5H 2 O to 200 mL of a 10% NH 4 OH solution, with stirring, a pink gelatinous precipitate was immediately observed.…”

Propylene epoxidation with in situ generated H2O2 in supercritical conditions

“…Nowadays, the catalytic processes which combine two or more consecutive reactions are being very attractive from sustainability point of view due to the reduction in the number of sub-processes associated to isolation and separation tasks of intermediate products [22]. Into this approach, the use of active and reusable bi-functional catalysts which contain metallic nanoparticles (NPs) embedded into inorganic oxide type-matrixes are currently being profusely considered for different catalytic processes [23,24,25].…”

Entrapment of metal nanoparticles within nanocages of mesoporous silicas aided by co-surfactants

“…As a result, the ordered mesoporous structure is difficult to be constructed. 13,14,17 In addition, to the best of our knowledge, the in situ encapsulation of metal NPs inside nanocages of cagelike mesoporous silicas (CMS) has not been reported yet, although cubic structured mesoporous silicas (SBA-16, FDU-12, and KIT-6) with unique three-dimensional interconnected nanocages have been reported to show high stability for the encapsulated metal NPs compared to other porous structures. [20][21][22] This might be due to difficulty in the synthesis of CMS, which is very sensitive to the synthetic conditions compared with SBA-15 or other mesoporous structures.…”