Fig. 4. In situ FAL-absorbed FTIR spectra in the presence of NH3/H2 on (a) CoCu@CoCuOx and (b) Co@CoOx catalysts. (c) Intensity evolution of the N–H bond (at 3334 cm−1) over CoCu@CoCuOx and Co@CoOx catalysts. (d) H2-TPD profiles and (e) hydrogen spillover experiments of Co@CoOx, Cu@CuOx and CoCu@CoCuOx catalysts. (f) Reaction rate comparison of FAL hydrogenation over Co@CoOx, Cu@CuOx and CoCu@CoCuOx catalysts. Reaction conditions: FAL 0.24 mmol, catalyst 30 mg, methanol 4.0 mL, H2 3 MPa, 30 °C, 6 h.
