Electronic Structure Engineering of Single‐Atom Ru Sites via Co–N4 Sites for Bifunctional pH‐Universal Water Splitting

Abstract The development of bifunctional water‐splitting electrocatalysts that are efficient and stable over a wide range of pH is of great significance but challenging. Here, an atomically dispersed Ru/Co dual‐sites catalyst is reported anchored on N‐doped carbon (Ru/Co–N–C) for outstanding oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in both acidic and alkaline electrolytes. The Ru/Co–N–C catalyst requires the overpotential of only 13 and 23 mV for HER, 232 and 247 mV for OER to deliver a current density of 10 mA cm geo −2 in 0.5 m H 2 SO 4 and 1 m KOH, respectively, outperforming benchmark catalysts Pt/C and RuO 2 . Theoretical calculations reveal that the introduction of Co–N4…

• NN
  National Natural Science Foundation of China

  Award: 21873086
• ZU
  Zhengzhou University
• AR
  Australian Research Council

  Awards: FT170100224, IC200100023, DP210103892