Fig. 5. (a) CO2 conversion and product selectivity versus time obtained from 2.5 wt% RhFeLi/TiO2 NRs. CO reduction was conducted at 350 °C for 0.5 h. Re-reduction in H2 was carried out at 400 °C for 1 h. Reaction conditions: P = 30 atm, T = 250 °C, GHSV = 6000 h–1, CO2/H2 = 1/3. (b) The peak area of hydroxyls in FTIR normalized by SBET (×103) on 2.5 wt% RhFeLi/TiO2 NRs pretreated under different reduction atmospheres. (c) The peak area of hydroxyls in FTIR normalized by SBET (×103) on 2.5 wt% RhFeLi/TiO2 NRs calcined at different temperatures.
