Abstract
Metal–carbon–carbon nanofibers composites obtained by catalytic pyrolysis of urban plastic residues have been prepared using Fe, Co or Ni as pyrolitic catalysts. The composite materials have been fully characterized from a textural and chemical point of view. The proportion of carbon nanofibers and the final content of carbon phases depend on the used pyrolitic metal with Ni being the most active pyrolitic catalysts. The composites show the electro-catalyst activity in the CO2 reduction to hydrocarbons, favoring all the formation of C1 to C4 hydrocarbons. The tendency of this activity is in accordance with the apparent faradaic efficiencies and the linear sweep voltammetries. The cobalt-based composite shows high selectivity to C3 hydrocarbons within this group of compounds.
Highlights
The increase of CO2 concentration in the atmosphere is thought to be one of the main causes of global climate change [1]
We demonstrate the application of metal-carbon-carbon nanofibers composites obtained from real world plastic waste as promising electrodes in the electro-catalytic reduction of CO2 to hydrocarbons
These CNF are clearly visible in sample PNi, where they are longer than in the other composites, by high resolution transmission electron microscopy (HRTEM) (Figure 2) the presence of CNF has been detected in all the samples being these
Summary
The increase of CO2 concentration in the atmosphere is thought to be one of the main causes of global climate change [1]. Renewable energy sources are supposed to be a replacement, but nowadays they are not producing the constant currents that fossil fuels provide. For this reason, the storage of surplus electrical energy produced during the peak production periods, and its release during peak demand periods, should be crucial. Battery manufacturing requires a lot of resources, reducing their contribution to controlling CO2 emission, and its life is relatively limited. Recycling of their components is a challenge
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