Preparation of Co-MoF-derived Cobalt-based Catalyst and its Properties for Hydrogen Production from NaBH4 Hydrolysis
A series of cobalt-based derived catalysts were prepared by inert atmosphere carbonization method based on cobalt-based MOF precursor.The catalytic performance of different catalysts in hydrogen production from NaBH4 hydrolysis was investigated.The effects of different carbonation temperatures on the crystal structure,microstructure and elemental valence of Co-MOF catalysts were analyzed by X-ray diffractometer(XRD),transmission electron microscopy(TEM),X-ray photoelectron spectroscopy(XPS)and thermo-gravimetric analysis(TGA).The results show that:Co-MOF derived catalysts exhibit different morphologies,crystal phase and elemental valence states at different carbonization temperature.Node-cobalt gradually transforms to elemental cobalt from ionic cobalt with the carbonization temperature increasing under inert atmosphere.The hydrogen production experiment from NaBH4 hydrolysis showed that different carbonization temperatures could significantly affect the catalytic activity and stability of the catalysts during NaBH4 hydrolysis.Among all these catalysts,Co-MOF(300)catalyst from cobalt ion conversion shows the best catalytic activity,which is significantly higher than other cobalt-based catalysts from the high temperature carbonization.
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