Citation: Yapeng Dong, Rong Nie, Jixian Wang, Xiaogang Yu, Pengcheng Tu, Jiazang Chen, Huanwang Jing. Photoelectrocatalytic CO₂ reduction based on metalloporphyrin-modified TiO₂ photocathode[J]. Chinese Journal of Catalysis, ;2019, 40(8): 1222-1230. doi: S1872-2067(19)63375-9 shu

Photoelectrocatalytic CO₂ reduction based on metalloporphyrin-modified TiO₂ photocathode

a State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, China;
b State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, Shanxi, China

Received Date: 17 February 2019
Revised Date: 8 April 2019

Fund Project: This work was funded by the Natural Science Foundation of Gansu Province (17JR5RA212) and the State Key Laboratory of Coal Conversion (J19-20-913-1).

The conversion of CO₂ and water to value-added chemicals under sunlight irradiation, especially by photoelectrocatalytic reduction process, is always a dream for human beings. A new artificial photosynthesis system composed of a metalloporphyrin-functionalized TiO₂ photocathode and BiVO₄ photoanode can efficiently transform CO₂ and water to methanol, which is accompanied by oxygen release. This photoelectrocatalytic system smoothly produces methanol at a rate of 55.5 μM h^-1 cm^-2, with 0.6 V being the membrane voltage in plants. The production of hydrogen can also be observed when the voltage is more than 0.75 V, due to photocatalysis. Our results evidently indicate that the molecules of metalloporphyrin attached onto the surface of anatase (TiO₂) behave as chlorophyll, NADP, and Calvin cycle in plant cells.
- Artificial photosynthesis,
- Carbon dioxide reduction,
- Photoelectrocatalysis,
- Metalloporphyrin,
- Titanium dioxide
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Photoelectrocatalytic CO₂ reduction based on metalloporphyrin-modified TiO₂ photocathode