13-9 Hydrogen from decoupled water electrolysis may regulate electricity peak loads

DENG Denghui’s group at the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences wants to use hydrogen as a green energy carrier to balance peaks and troughs in power consumption. To this end, they use polysulfides as a mediator in a galvanostat, lowering the reduction potential for the formation of hydrogen to + 0.82 V at 100 mA/cm2, 60% below the value for the direct electrolysis of water. The mediator is then reduced again during nighttime operation at -1.81 V. The electrode is made of a CoNi nanoalloy encapsulated in N-doped graphene (CoNi@NGs), protecting it from sulfide corrosion. Using this “chainmail catalyst,” the researchers produced hydrogen in high space-time yields for 500 hours without poisoning the electrode.

DOI:https://doi.org/10.1016/j.xinn.2021.100144

┬ęDENG Denghui, CAS DICP
13-9 Hydrogen from decoupled water electrolysis may regulate electricity peak loads
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