Abstract
Water-splitting into O2 and H2 is a promising way to prepare eco-friendly fuels in the future. However, the water-oxidation is the bottleneck for this important reaction. Thus, finding more details of water-oxidation mechanism leads to design more efficient water-splitting catalysts for the hydrogen evolution reaction. Herein, an aluminum-free manganese incorporated ZSM-5 type zeolite is synthesized and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, UV–Vis diffuse reflectance spectroscopy (DRS), Field emission scanning electron microscopy (FESEM), Energy-dispersive X-ray spectroscopy (EDX), Atomic absorption spectroscopy (AAS), Transmission electron microscopy (TEM) and N2 physical adsorption analysis. The water-oxidizing activity of the synthesized sample is studied in the presence of ammonium cerium(IV) nitrate as an oxidant. Water-oxidation experiments confirm that direct cooperation between Mn ions is one of the most important factors for the water-oxidation by Mn oxides.
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