Utilizing new metal phase nanocomposites deep photocatalytic conversion of CO2 to C2H4

Photocatalytic CO2reduction on Cu single atoms incorporated in ordered macroporous TiO2toward tunable products

“…On the other hand, it is widely accepted that the generation of the C 2 product undergoes three different reaction paths: (1) a *COCO intermediate from *CO dimerization, (2) a *COCHO intermediate from the dimerization between *CO and *CHO, and (3) a *CHOCHO intermediate from *CHO dimerization. 71,77,78 In the liquid-solid system of photocatalytic CO 2 reduction (Fig. 8b), the coexistence of *CO and *CHO intermediates is a crucial clue to speculate that the formation of C 2 H 4 follows the pathway of the *COCHO intermediate from dimerization between *CO and *CHO.…”

Solar fuels: research and development strategies to accelerate photocatalytic CO2 conversion into hydrocarbon fuels

“…Recently, numerous studies have been conducted on the evolution of C 2 (e.g., C 2 H 4 ) and higher hydrocarbons during the photocatalytic CO 2 reduction. 263 However, this is associated with many challenges owing to the relatively low efficiency of multi-electron transfer and slow dynamics of C-C coupling. The formation of the key intermediates of *OC-CO and *OC-COH required for the production of C 2 and higher hydrocarbons from CO 2 over photocatalysts is also very difficult compared to electrocatalytic reactions.…”

Mechanism of CO2 hydrogenation over a Zr1–Cu single-atom catalyst

“…1 Hydrogenation products of CO 2 mainly include methanol (CH 3 OH), 2–5 methane (CH 4 ), 6,7 formic acid (HCOOH), 8–10 dimethyl ether (CH 3 OCH 3 ), 11–13 and CO. 14–18 CO is used to produce liquid fuels such as olefin and polyol through the Fischer–Tropsch (FT) process and other mature processes. 19–24 Methanol is a liquid solar fuel, and it is highly significant to realize the hydrogenation of CO 2 to methanol. 25…”