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.

迫切需要开发新的，高效的，化学选择性的和看似稳定的催化剂，以将4-硝基苯酚快速转化为4-氨基苯酚，这是在多个行业中特别有价值的化学品。在4-氨基苯酚合成中使用无毒且无腐蚀性的化学品提出了进一步的挑战。我们显示了一种简单且可扩展的形状控制电沉积法，该方法使用双模板方法合成定义明确的多孔Au微柱阵列电极，以增强4-硝基苯酚电还原过程中的电催化剂稳定性，效率和耐用性。因此，我们避免使用有毒和侵蚀性的化学还原剂，并将残留物的产生降至最低。表面积最大为55.2 m ²  g ^-1获得了与非结构化的Au膜电极相比的实质性改进。多孔金微柱表现出优异的收率（̴100％），化学选择性（未检测到其他副产物）和2.5×10 ^-2  min ^-1的高动力学常数，这比最近报道的Au薄膜或Au-的电催化剂。