Journal
ADVANCED MATERIALS
Volume 35, Issue 23, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202301533
Keywords
electrocatalysis; hydrazine-assisted water splitting; hydrazine oxidation reaction; nanomaterials; noble metals
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A new type of RhRu0.5 alloy wavy nanowires is designed and synthesized as bifunctional electrocatalysts for hydrazine oxidation reaction (HzOR) and hydrogen evolution reaction (HER) in low-voltage green hydrogen production. The RhRu0.5 alloy wavy nanowires exhibit complete electrooxidation of hydrazine with low overpotential and high mass activity, as well as improved performance for HER.
Hydrazine-assisted water electrolysis offers a feasible path for low-voltage green hydrogen production. Herein, the design and synthesis of ultrathin RhRu0.5-alloy wavy nanowires as bifunctional electrocatalysts for both the anodic hydrazine oxidation reaction (HzOR) and the cathodic hydrogen evolution reaction (HER) is reported. It is shown that the RhRu0.5-alloy wavy nanowires can achieve complete electrooxidation of hydrazine with a low overpotential and high mass activity, as well as improved performance for the HER. The resulting RhRu0.5 bifunctional electrocatalysts enable, high performance hydrazine-assisted water electrolysis delivering a current density of 100 mA cm(-2) at an ultralow cell voltage of 54 mV and a high current density of 853 mA cm(-2) at a cell voltage of 0.6 V. The RhRu0.5 electrocatalysts further demonstrate a stable operation at a high current density of 100 mA cm(-2) for 80 hours of testing period with little irreversible degradation. The overall performance greatly exceeds that of the previously reported hydrazine-assisted water electrolyzers, offering a pathway for efficiently converting hazardous hydrazine into molecular hydrogen.
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