Plasma-Catalyzed Sustainable Nanostructured Carbon Synthesis: Advancing Chemical-Looping CO₂ Fixation

High Resolution Image Download MS PowerPoint Slide Clean energy-driven high-flux CO-to-C conversion has become increasingly urgent following the recent validation of CO 2 -to-CO-to-C chemical looping. This approach addresses rising net carbon emissions and the growing demand for green nanocarbons, but the CO-to-C conversion limits process capacity. Meanwhile, sustainable nanocarbon production via mainstream thermal catalytic chemical vapor deposition of hydrocarbons faces bottlenecks. CO 2 is released during thermal reactions, and the process is hindered by the high temperatures, gas dilution requirements, rapid catalyst deactivation, and inconsistent carbon quality. Here, we report a strategy using cost-efficient iron oxides, combining nonthermal plasma, the Boudouard reaction, and fluidized bed technology for electrified high-flux CO-to-C conversion. This process integrates high carbon yield (>228.9 g C g Fe –1 ) and synthesis rate (30.2 g C g Fe –1 h –1 ), operates an electrically driven mode at a reduced temperature (577 °C), avoids catalyst deactivation (>11 h), requires no gas dilution, and produces high-quality nanocarbons (nanofibers/nanocoils), demonstrating its industrial potential for sustainable nanocarbon synthesis and CO 2 fixation.