Highly Active and Durable Single‐Atom Tungsten‐Doped NiS 0.5 Se 0.5 Nanosheet @ NiS 0.5 Se 0.5 Nanorod Heterostructures for Water Splitting

Abstract Developing robust and highly active non‐precious electrocatalysts for the hydrogen/oxygen evolution reaction (HER/OER) is crucial for the industrialization of hydrogen energy. In this study, a highly active and durable single‐atom W‐doped NiS 0.5 Se 0.5 nanosheet @ NiS 0.5 Se 0.5 nanorod heterostructure (W‐NiS 0.5 Se 0.5 ) electrocatalyst is prepared. W‐NiS 0.5 Se 0.5 exhibits excellent catalytic activity for the HER and OER with ultralow overpotentials (39 and 106 mV for the HER and 171 and 239 mV for the OER at 10 and 100 mA cm −2 , respectively) and excellent long‐term durability (500 h), outperforming commercial precious‐metal catalysts and many other previously reported transition‐metal‐based…

• NN
  National Natural Science Foundation of China

  Awards: U1601216, 51701139, 51972224