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Hollow Iron-Vanadium Composite Spheres: A Highly Efficient Iron-Based Water Oxidation Electrocatalyst without the Need for Nickel or Cobalt.

Ke FanYongfei JiHaiyuan ZouJinfeng ZhangBicheng ZhuHong ChenQuentin DanielYi LuoJiaguo YuLicheng Sun
Published in: Angewandte Chemie (International ed. in English) (2017)
Noble-metal-free bimetal-based electrocatalysts have shown high efficiency for water oxidation. Ni and/or Co in these electrocatalysts are essential to provide a conductive, high-surface area and a chemically stable host. However, the necessity of Ni or Co limits the scope of low-cost electrocatalysts. Herein, we report a hierarchical hollow FeV composite, which is Ni- and Co-free and highly efficient for electrocatalytic water oxidation with low overpotential 390 mV (10 mA cm-2 catalytic current density), low Tafel slope of 36.7 mV dec-1 , and a considerable durability. This work provides a novel and efficient catalyst, and greatly expands the scope of low-cost Fe-based electrocatalysts for water splitting without need of Ni or Co.
Keyphrases
  • metal organic framework
  • highly efficient
  • low cost
  • high efficiency
  • hydrogen peroxide
  • reduced graphene oxide
  • iron deficiency
  • gold nanoparticles
  • electron transfer
  • high resolution
  • mass spectrometry