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Updated: Dec 2, 2025
Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Probing the effect of P-doping in polymeric carbon nitride on CO2 photocatalytic reduction
Yangkun Guo1, Min Wang1, Jianjian Tian1
1State Key Laboratory of High performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, P. R. China. jlshi@mail.sic.ac.cn and Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, P. R. China.
Abstract:
Developing highly efficient photocatalysts is of crucial importance to solve the energy crisis and global warming issues. In this work, a P-doped polymeric carbon nitride (CN) photocatalyst was synthesized by one-step copolymerization of guanidine hydrochloride and phosphonitrilic chloride trimer. The doping of P in CN was found to alter the electronic structure, enhance the charge separation and transfer, and promote the CO2 adsorption and activation, making it an efficient CO2 photoreduction catalyst. At the optimized P dose, the CO evolution amount on P-doped CN reached 0.349 μmol (30 mg, 3 h), which was 3.5 times that of pure CN. The process of CO2 photoreduction on P-doped CN was investigated by in situ FTIR analysis, revealing that P doping could promote the formation of a CO2- intermediate. A possible mechanism has been proposed, which may provide new insights into the effect of non-metal element doping in CN on its CO2 photocatalytic reduction performance.
