Selective photocatalytic CO2 reduction in aerobic environment by microporous Pd-porphyrin-based polymers coated hollow TiO2

Abstract Direct photocatalytic CO 2 reduction from primary sources, such as flue gas and air, into fuels, is highly desired, but the thermodynamically favored O 2 reduction almost completely impedes this process. Herein, we report on the efficacy of a composite photocatalyst prepared by hyper-crosslinking porphyrin-based polymers on hollow TiO 2 surface and subsequent coordinating with Pd(II). Such composite exhibits high resistance against O 2 inhibition, leading to 12% conversion yield of CO 2 from air after 2-h UV-visible light irradiation. In contrast, the CO 2 reduction over Pd/TiO 2 without the polymer is severely inhibited by the presence of O 2 ( ≥ 0.2 %). This study presents a feasible strategy,…

• NN
  National Natural Science Foundation of China

  Awards: 21771070, 2018KFYYXJJ120, 22122602, 22122602, 21771070, 22161142005, 2019KFYRCPY104, 22161142005
• HU
  Huazhong University of Science and Technology
• FR
  Fundamental Research Funds for the Central Universities

  Awards: 21771070, 2018KFYYXJJ120, 2019KFYRCPY104