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Zinc–zinc oxide cycle
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<p>For <a href="/facts/Chemical_reaction/GpqWlKrz">chemical reactions</a>, the zinc–zinc oxide cycle or Zn–ZnO cycle is a two step <a href="/facts/Thermochemical_cycle/RWwLke80">thermochemical cycle</a> based on <a href="/facts/Zinc/80b1qgk3">zinc</a> and <a href="/facts/Zinc_oxide/P7sTyDez">zinc oxide</a> for <a href="/facts/Hydrogen_production/wVo66xRK">hydrogen production</a> with a typical efficiency around 40%. </p>