Palladium Nanothorn Assembly Array for Efficient Electroreduction of Nitrogen to Ammonia
Songliang Liu, Ziqiang Wang, Hugang Zhang, Shengqi Wang, Peng Wang, You Xu, Xiao‐Nian Li, Liang Wang, Hongjing Wang
Abstract
Controllable preparation of palladium-based nanomaterials is of great significance for electrochemical ammonia synthesis. Herein, a micelle-assisted replacement strategy was reported for the in situ synthesis of palladium nanothorn assembly array on Ni foam (Pd NTA-NF), in which NF behaves as a conductive substrate and reducing agent. Owing to the nanothorn assembly structure and binder-free property, Pd NTA-NF directly acts as a highly efficient electrode for nitrogen reduction reaction. Therefore, Pd NTA-NF obtains excellent activity (NH3 yield: 5.45 μg h–1 cm–2), faradaic efficiency (20.01%), and stability under neutral conditions. The synthetic approach offers an efficient and valuable approach for growing self-assembled noble metal arrays on NF, which have high potential for electrochemical nitrogen reduction to ammonia and other electrocatalytic fields.