Nuclear resonant vibrational spectroscopy on Na–Fe₃O₄/HZSM-5 which catalyzes the conversion from carbon dioxide to gasoline fuel

In this letter, the first nuclear resonant vibrational spectroscopy (NRVS) measurement on Na–Fe₃O₄/HZSM-5 multifunction catalyst for CO₂ → gasoline reactions is reported and discussed. A series of model or standard samples were also measured to provide comparisons. The Na–Fe₃O₄/HZSM-5 at the end of the catalytic reaction is identified via NRVS as a pure form of Fe₅C₂ without Fe₃O₄ or Fe(0). In the future, the information regarding to various catalytic intermediates can also be investigated via NRVS either on the extracted samples or with an <i>in-situ</i> measurement on the reaction cells. The advantages of NRVS can provide benefits for these researches.