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Title: Efficient and green electrochemical synthesis of 4-aminophenol using porous Au micropillars
Author: Tranchant, Maxime
Serrà i Ramos, Albert
Gunderson, Christopher
Bertero, Enrico
Garcia Amorós, Jaume
Gómez, Elvira
Michler, Johann
Philippe, Laetitia
Keywords: Electrocatàlisi
Issue Date: 19-Jun-2020
Publisher: Elsevier B.V.
Abstract: The development of new, efficient, chemoselective, and seemingly stable catalysts to rapidly convert 4-nitrophenol into 4-aminophenol, which is a particularly valuable chemical within multiple industries, is highly required. The use of non-toxic and non-corrosive chemicals for 4-aminophenol synthesis presents further challenges. We show a simple and scalable shape-controlled electrodeposition using a dual-template method for the synthesis of well-defined porous Au micropillar array electrodes to enhance electrocatalyst stability, efficiency, and durability during the electroreduction of 4-nitrophenol. Consequently, we avoid the use of toxic and aggressive chemical reducing agents and minimize the production of residues. Surface areas up to 55.2 m2 g-1 are achieved, which represent a substantial improvement over non-architectured Au film electrodes. Porous Au micropillars exhibit excellent yields (̴100%), chemoselectivity (other byproducts are not detected), and a high kinetic constant of 2.5 × 10-2 min-1, which is impressively higher than those reported recently for Au thin films or Au-based electrocatalysts.
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It is part of: Applied Catalysis A-General, 2020, vol. 602, p. 117698-117698
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ISSN: 0926-860X
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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