Fig. 4. The influence of core–shell particles on the selectivity of FTO. (a) The product selectivity of the 35Fe/hNCNC-3 and 35Fe/hNCNC-3-HP catalysts containing the less and more core–shell particles, respectively. (b) Schematic illustration of the selectivity to lower olefins and methane for the catalysts containing fewer (left) and more (right) core–shell particles, respectively. (c) Selectivity evolution for the 35Fe/hNCNC-3 catalyst. The reaction conditions are listed in Table 1.
