NH4Cl‐Assisted Electrosynthesis of P‐Doped Co(OH)2 Nanosheet on Cu2S Hollow Nanotube Arrays for Glycerol Electrooxidation

Abstract The glycerol oxidation reaction (GOR) for producing high‐value‐added organic compounds is of great research interest due to its potential in alleviating the energy crisis. Herein, a facile NH 4 Cl‐assisted electrodeposition strategy is reported to fabricate 3D nano‐forest array‐like hollow nanostructures. The hierarchical heterojunction by combining phosphorus doping Co(OH) 2 nanosheets with Cu 2 S nanotube arrays (P‐Co(OH) 2 @Cu 2 S NTs/CF) is developed to realize the optimization on GOR. The optimized P‐Co(OH) 2 @Cu 2 S NTs/CF catalyst exhibits an exceptional activity with a formate Faradaic efficiency (FE) of 97.40% at a potential of 1.30 V (vs RHE). The experimental results indicate that this unique hollow nano‐forest structure, grown on a conductive support, can expose more active sites and facilitate electron transfer, thereby demonstrating excellent GOR performance. This work provides new opportunities for the design of electrocatalysts of high‐activity and low‐cost hollow heterostructure electrocatalysts for glycerol electrooxidation.