Tranchant, MaximeSerrà i Ramos, AlbertGunderson, ChristopherBertero, EnricoGarcia Amorós, JaumeGómez, ElviraMichler, JohannPhilippe, Laetitia2020-07-232020-07-232020-06-190926-860Xhttps://hdl.handle.net/2445/169352The 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.8 p.application/pdfengcc-by (c) Tranchant et al., 2020http://creativecommons.org/licenses/by/3.0/es/ElectrocatàlisiElectroquímicaElectrocatalysisElectrochemistryinfo:eu-repo/semantics/article7020492020-07-23info:eu-repo/semantics/openAccess