A recent study has unveiled the working mechanisms of nickel and nitrogen co-doped carbon (Ni-N-C) catalysts, which are highly effective in converting CO₂ into carbon monoxide (CO), a valuable chemical feedstock. Using advanced techniques like operando X-ray absorption spectroscopy (XAS), X-ray emission spectroscopy (XES), and machine learning, researchers analyzed the interaction of CO₂ with nickel at the atomic level. This comprehensive characterization provides insights into the evolving structure of the active sites during the CO₂ reduction reaction (CO₂RR). The findings pave the way for designing more efficient and durable catalysts, which are crucial for transforming CO₂ into industrially valuable resources, such as hydrocarbons when combined with green hydrogen. Published in Physical Review Letters, the study marks a significant advancement in CO₂ reduction technology.
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