Issue 32, 2017

Silver and palladium alloy nanoparticle catalysts: reductive coupling of nitrobenzene through light irradiation

Abstract

Silver–palladium (Ag–Pd) alloy nanoparticles strongly absorb visible light and exhibit significantly higher photocatalytic activity compared to both pure palladium (Pd) and silver (Ag) nanoparticles. Photocatalysts of Ag–Pd alloy nanoparticles on ZrO2 and Al2O3 supports are developed to catalyze the nitroaromatic coupling to the corresponding azo compounds under visible light irradiation. Ag–Pd alloy NP/ZrO2 exhibited the highest photocatalytic activity for nitrobenzene coupling to azobenzene (yield of ∼80% in 3 hours). The photocatalytic efficiency could be optimized by altering the Ag : Pd ratio of the alloy nanoparticles, irradiation light intensity, temperature and wavelength. The rate of the reaction depends on the population and energy of the excited electrons, which can be improved by increasing the light intensity or by using a shorter wavelength. The knowledge developed in this study may inspire further studies on Ag alloy photocatalysts and organic syntheses using Ag–Pd nanoparticle catalysts driven under visible light Irradiation.

Graphical abstract: Silver and palladium alloy nanoparticle catalysts: reductive coupling of nitrobenzene through light irradiation

Supplementary files

Article information

Article type
Paper
Submitted
03 feb 2017
Accepted
10 apr 2017
First published
13 apr 2017

Dalton Trans., 2017,46, 10665-10672

Silver and palladium alloy nanoparticle catalysts: reductive coupling of nitrobenzene through light irradiation

S. Peiris, S. Sarina, C. Han, Q. Xiao and H. Zhu, Dalton Trans., 2017, 46, 10665 DOI: 10.1039/C7DT00418D

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