An Advanced Ni-Fe Layered Double Hydroxide Electrocatalyst for Water Oxidation

J Am Chem Soc. 2013 Jun 12;135(23):8452-5. doi: 10.1021/ja4027715. Epub 2013 May 28.

Abstract

Highly active, durable, and cost-effective electrocatalysts for water oxidation to evolve oxygen gas hold a key to a range of renewable energy solutions, including water-splitting and rechargeable metal-air batteries. Here, we report the synthesis of ultrathin nickel-iron layered double hydroxide (NiFe-LDH) nanoplates on mildly oxidized multiwalled carbon nanotubes (CNTs). Incorporation of Fe into the nickel hydroxide induced the formation of NiFe-LDH. The crystalline NiFe-LDH phase in nanoplate form is found to be highly active for oxygen evolution reaction in alkaline solutions. For NiFe-LDH grown on a network of CNTs, the resulting NiFe-LDH/CNT complex exhibits higher electrocatalytic activity and stability for oxygen evolution than commercial precious metal Ir catalysts.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Catalysis
  • Electrochemical Techniques*
  • Hydroxides / chemical synthesis
  • Hydroxides / chemistry*
  • Iron / chemistry*
  • Nanotubes, Carbon / chemistry
  • Nickel / chemistry*
  • Oxidation-Reduction
  • Particle Size
  • Surface Properties
  • Water / chemistry*

Substances

  • Hydroxides
  • Nanotubes, Carbon
  • Water
  • Nickel
  • Iron