Articles written in Journal of Chemical Sciences
Volume 129 Issue 11 November 2017 pp 1661-1669 REGULAR ARTICLE
Silver-based bimetallic Pd/Ag plasmonic catalysts supported on mesoporous silica catalyze the chemoselective reduction of nitrostyrene (NS) to aminostyrene (AS). Ammonia borane (AB) is used as a mild reducing agent to generate H₂ in situ on the surface of exposed Ag and Pd atoms for −NO₂ reduction at room temperature and atmospheric pressure. Systematic studies on the effect of nanoparticles (NPs) size are performed in dark and under light irradiation conditions. The spherical yellow colored bimetallic Pd/Ag/SBA-15(Y) exhibited maximum AS conversion of 89% at 90 min under visible light irradiation. The catalysts display higher selectivity under visible light irradiation which can be due to the efficient adsorption and transfer ofH⁺ /H⁻ pair to the polar bonds in the nitro group.
Volume 129 Issue 11 November 2017 pp 1695-1703 REGULAR ARTICLE
A facile synthetic protocol was used to prepare morphology controlled Pd nanocrystals with spherical and cubic shapes of different sizes. Carbon-supported catalysts were prepared from the as-synthesised nanocrystals and their catalytic ability in a tandem dehydrogenation/hydrogenation reaction composed by the dehydrogenation of ammonia borane, serving as a hydrogen source, and the subsequent hydrogenation of 4- nitrophenol (4-NP) to 4-aminophenol (4-AP) was assessed. The catalytic performance was strongly dependent on the nanocrystals morphology and the spherical nanoparticles with an average size of 5.5 nm displayed the best performance among investigated.
Volume 134, 2022
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