Solvent effects on the kinetics of 4-nitrophenol reduction by NaBH₄ in the presence of Ag and Au nanoparticles.

ABSTRACT: The reduction of 4-nitrophenol (4-NiP) to 4-aminophenol (4-AP) with an excess of sodium borohydride is commonly used as a model reaction to assess the catalytic activity of metallic nanoparticles. This reaction is considered both a potentially important step in industrial water treatment and an attractive, commercially relevant synthetic pathway. Surprisingly, an important factor, the role of the reaction medium on the reduction performance, has so far been overlooked. Here, we report a pronounced effect of the solvent on the reaction kinetics in the presence of silver and gold nanoparticles. We demonstrate that the addition of methanol, ethanol, or isopropanol to the reaction mixture leads to a dramatic decrease in the reaction rate. For typical concentrations of reactants, the reduction

SUBMITTER: Lomonosov V 

PROVIDER: S-EPMC9316932 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature