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Title: Simple environmentally-friendly reduction of 4-nitrophenol
Author: Serrà i Ramos, Albert
Artal López, Raúl
Pozo, Maria
Garcia Amorós, Jaume
Gómez, Elvira
Keywords: Electrocatàlisi
Reducció química
Catàlisi heterogènia
Depuració d'aigües residuals
Reduction (Chemistry)
Heterogeneus catalysis
Purification of sewage
Issue Date: 23-Apr-2020
Publisher: MDPI
Abstract: Abstract: 4-nitrophenol is a low molecular-mass organic compound involved in many chemical processes and commonly present in soils and in surface and ground waters, thereby causing severe environmental impact and health risk. Several methods have been proposed for its transformation (bio and chemical degradation). However, these strategies not only produce equally or more toxic aromatic species but also require harsh operating conditions and/or time-consuming treatments. In this context, we report a comprehensive and systematic study of the electrochemical reduction of 4-nitrophenol as a viable alternative. We have explored the electrochemical reduction of this pollutant over different metallic and carbonaceous substrata. Specifically, we have focused on the use of gold and silver working electrodes since they combine a high electrocatalytic activity for 4-nitrophenol reduction and a low electrocatalytic capacity for hydrogen evolution. The influence of the pH, temperature, and applied potential have also been considered as crucial parameters in the overall optimization of the process. While acidic media and high temperatures favor the clean reduction of 4-nitrophenol to 4-aminophenol, simultaneous hydrogen evolution results pernicious for this purpose. As a whole, a simple and effective electrochemical method for the transformation of 4-nitrophenol into 4-aminophenolis proposed with virtually no undesired by-products.
Note: Reproducció del document publicat a:
It is part of: Catalysts, 2020, vol. 10, p. 458-1-458-12
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ISSN: 2073-4344
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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