关键字：OXYGEN-EVOLUTION ELECTROCATALYSTS; HYDROGEN-PRODUCTION; FRAMEWORK; NANOSTRUCTURES; NANOSHEETS; HYDROXIDE; SITES; NI

摘要：Metal-organic gels (MOG) are highly porous and widely used in electrocatalysis, but there has been little research on their transition during oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Here, by adopting the pairwise and ternary combination of Fe/Co/Ni and further precisely regulating the ratio of metal ions, we report an optimized trimetallic organic gel Co2.0FeNi-MOG as a pre-electrocatalyst. In addition, we characterized the transition of MOG during the electrocatalysis process in detail through TEM, XPS, in-situ Raman and in-situ impedance, and the results show that the metal centers in MOG were converted to oxides and inherited the porosity of MOG during electrocatalysis. The pre-electrocatalyst shows significant OER activity with a low overpotential of 267 mV (j10) and an ultra-low Tafel slope of 23.6 mV dec-1 in alkaline electrolyte. It also shows excellent performance in HER and overall water splitting.

卷号：60

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是否译文：否