articleScienceJun 20, 2024GREEN OA

Water-hydroxide trapping in cobalt tungstate for proton exchange membrane water electrolysis

RRRanit RamLXLu XiaHBH. BenzidiAGAnku GuhaVGViktoria Golovanova

Institute of Photonic Sciences · Institut Català d'Investigació Química · +7 more institutions

PubMed
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Abstract

The oxygen evolution reaction is the bottleneck to energy-efficient water-based electrolysis for the production of hydrogen and other solar fuels. In proton exchange membrane water electrolysis (PEMWE), precious metals have generally been necessary for the stable catalysis of this reaction. In this work, we report that delamination of cobalt tungstate enables high activity and durability through the stabilization of oxide and water-hydroxide networks of the lattice defects in acid. The resulting catalysts achieve lower overpotentials, a current density of 1.8 amperes per square centimeter at 2 volts, and stable operation up to 1 ampere per square centimeter in a PEMWE system at industrial conditions (80°C) at…

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391
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100%
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19

Topics & keywords

Topics
Keywords
  • Tungstate
  • Electrolysis
  • Electrolysis of water
  • Cobalt
  • Hydrogen production
  • Inorganic chemistry
  • Potassium hydroxide
  • Catalysis
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