Reduction of 4-nitrophenol to 4-aminophenol using a novel Pd@NixB-SiO2/RGO nanocomposite: enhanced hydrogen spillover and high catalytic performance

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Krishna, R (Author) Other; Diana M Fernandes (Author) FCUP; Domingos, VF (Author) Other; Ribeiro, ES (Author) Other; Gil, JC (Author) Other; Dias, C (Author) Other; ventura, j. (Author) FCUP; Cristina Freire (Author) FCUP; Titus, E (Author) Other

Journal

Title: RSC Advances

Vol. 5

Pages: 60658-60666

ISSN: 2046-2069

Publisher: Royal Society of Chemistry

Indexing

ISI Web of Knowledge - 16 Citations

Scopus - 16 Citations

Other information

Authenticus ID: P-00G-DDT

DOI: 10.1039/c5ra05523g

Abstract (EN): A nanocomposite catalyst containing palladium-nickel boride-silica and reduced graphene oxide (Pd@NixB-SiO2/RGO, abbreviated as Pd@NSG) was successfully fabricated and its enhanced hydrogen spillover mechanism and high catalytic performance towards reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) is discussed. The structure, composition and morphology of the Pd@NSG nanocomposite were characterized by various techniques. The H-2 adsorption experiment directly reveals the spillover effect on the Pd@NSG nanocomposite and its enhanced H-2 uptake capacity (0.7 wt%) compared to SiO2/RGO (0.05 wt%) under 50 bar pressure at RT. 4-NP reduction reaction shows remarkably high activity (120 s) of Pd@NSG compared to NixB-SiO2/RGO (7200 s) with excellent stability up to 5 cycles. Both the experiments showed the facile H-2 dissociation on the Pd (active sites) activator and subsequent transportation of hydrogen atoms on receptor sites.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9