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Keywords:

  • electrochemistry;
  • hydrogen;
  • renewable resources;
  • sustainable chemistry;
  • water splitting
Thumbnail image of graphical abstract

Pass the salt please: The electrolysis of water and aqueous solutions of common salts (NaCl, Na2CO3, and Na2SO4) with renewable electricity is potentially the best pathway to move towards a hydrogen economy and sustainable environment, but its cost-effectiveness is a major challenge. This Highlight looks at hurdles and opportunities for the large-scale production of hydrogen through electrolysis.