Efficient Catalysts of Ethanol Steam Reforming Based on Perovskite-Fluorite Nanocomposites with Supported Ni: Effect of the Synthesis Methods on the Activity and Stability

Catalysts based on perovskite-fluorite nanocomposites with supported nickel 5%Ni/[Pr0.15Sm0.15Ce0.35Zr0.35O2 + LaMn0.9Ru0.1O3] were synthesized by three different methods. Structural and surface features of as-prepared samples were elucidated by N-2 adsorption, XRD, HR TEM with EDX; reducibility and reactivity were estimated by H-2-TPR, and catalytic properties were studied in ethanol steam reforming in the 500-700 degrees C temperature range. The best catalytic activity without coke accumulation was demonstrated for the 5%Ni/[Pr0.15Sm0.15Ce0.35Zr0.35O2+ LaMn0.9Ru0.1O3] catalyst with nanocomposite support obtained by a simple sequential polymeric preparation method. Highly dispersed particles of metallic nickel strongly fixed on the support after the reaction were shown by the HR-TEM and H-2 -TPR data. The catalyst provides stable full conversion of ethanol and hydrogen yield above 60% at 600 degrees C for at least 6 h.

Automated summary

In this study, catalysts based on perovskite-fluorite nanocomposites with supported nickel were synthesized using different methods. The structural and surface features of the catalysts were characterized, and their reducibility and reactivity were evaluated. The results showed that the catalyst obtained by a simple sequential polymeric preparation method exhibited the best catalytic activity and stability, achieving complete conversion of ethanol and high hydrogen yield at elevated temperatures.