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The available processes for removing acetylene impurities from crude ethylene are tremendously energy‐intensive. Herein, we demonstrate a novel aqueous Zn–C2H2 battery, which not only switches energy‐consuming acetylene removal to electricity generation, but also reduces acetylene to ethylene through a unique discharge mechanism: C2H2+Zn+H2O→C2H4+ZnO. Under a pure acetylene stream, this Zn–C2H2 battery...
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