My research is focusing on waste-derived nanomaterials for electrocatalytic CO2 reduction. Electrocatalytic reduction of CO2 (ERCO2), powered by renewable electricity, is a promising strategy to convert CO2 emission to fuels and value-added chemicals, such as hydrocarbons and alcohols. Fayalitic slag from Zinc production contains a large number of metals (e.g. Fe, Si, Zn, Al, Pb, Cu), most of them have been proved to be active in ERCO2. Nanomaterials with different structures and compositions will be fabricated by these metals extracted from fayalitic slag, and further utilized in CO2 electroreduction. Combining with operando microscopy and spectroscopy techniques, reaction mechanism and vital intermediates which are still debatable would be revealed.