The increasing consumption of fossil fuels and CO2 emission would lead to a global climate change by the green house effect. Electrochemical CO2 reduction reaction is one of the promising solutions for CO2 utilization and useful fuels regeneration by sustainable energy such as solar and wind-powered electricity. It`s critical and urgent to find a cheap and abundant material as the catalytic promotor for CO2 reduction reaction in future large-scale applications. Petroleum coke, an industrial waste, was introduced in our work as the raw material for preparing highly efficient CO2 reduction catalyst. By acid and oxidant treatment, oxidized petroleum coke provides active surface functional groups for further heteroatom doping. Under pyrolysis with urea and transition metal salt, Ni/Fe and N were doped on the carbon lattice. Ni/N-doped petroleum coke (Ni-N-PC) showed a 97% selectivity for CO with a CO current density of 18 mA/cm2 at -0.8 V versus reversible hydrogen electrode (RHE). By adding Fe into Ni-N-PC during preparation process, Ni/Fe/N co-doped petroleum coke achieved a 90% selectivity for CO with a CO current density of 20 mA/cm2 at -0.8 V vs. RHE. The petroleum coke based catalyst showed a comparable result to that of traditional graphite-based catalysts but at a lower cost.

Industrial waste petroleum coke derived carbon catalyst with metal and nitrogen doping for electrochemical CO2 reduction

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.