Authors: Yajuan Ma, Xiaoxuan Yi, Shaolei Wang, Tao Li, Bien Tan, Chuncheng Chen, Tetsuro Majima, Eric R. Waclawik, Huaiyong Zhu, Jingyu Wang
Published: 2022-03-17
DOI: 10.1038/s41467-022-29102-0
Source: Full article
AbstractDirect photocatalytic CO2reduction from primary sources, such as flue gas and air, into fuels, is highly desired, but the thermodynamically favored O2reduction almost completely impedes this process. Herein, we report on the efficacy of a composite photocatalyst prepared by hyper-crosslinking porphyrin-based polymers on hollow TiO2surface and subsequent coordinating with Pd(II). Such composite exhibits high resistance against O2inhibition, leading to 12% conversion yield of CO2from air after 2-h UV-visible light irradiation. In contrast, the CO2reduction over Pd/TiO2without the polymer is severely inhibited by the presence of O2( ≥ 0.2 %). This study presents a feasible strategy, building Pd(II) sites into CO2-adsorptive polymers on hollow TiO2surface, for realizing CO2reduction with H2O in an aerobic environment by the high CO2/O2adsorption selectivity of polymers and efficient charge separation for CO2reduction and H2O oxidation on Pd(II) sites and hollow TiO2, respectively.