Efficient electrocatalytic •OOH production on P-N-CuO for selective cleavage of lignin C-C bonds in the photoelectric collaborative system

Due to the mutual quenching of oxidizing groups and reducing groups, the yield of photocatalytic lignin cracking is not satisfactory. In this work, the oxidizing and reducing groups were separated in space by the method of photoelectric collaborative for the first time. The conversion rate of 2-phenoxy-1-phenylethanol (pp-ol) could be increased by 129.00 % and 31.47 % and the yield of benzoic acid and benzaldehyde increased by up to 19.56 % and 119.95 % in the photoelectric collaborative system compared with individual electrocatalysis and photo- catalysis. P-doped N-CuO - CuO was used as electrocatalyst for directional and controllable generation of center dot OOH free radicals, while g-C3N4 3 N 4 was used as photocatalyst to produce C beta center dot beta center dot free radicals. For the mechanism, a new path of center dot OOH and C beta center dot beta center dot combining to fracture pp-ol was opened up. This work provides a new method to cracking lignin and used for aromatics production from renewable biomass feedstocks.