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<p>Photoelectrocatalytic catalysis of carbon dioxide (CO<sub>2</sub>) and nitrite (NO<sub>2</sub><sup>−</sup>) direct coupling to synthesise urea (NH<sub>2</sub>CONH<sub>2</sub>) can effectively avoid the high energy consumption and pollution of the Bosch-Meiser method. COF<sub>_PP-TAT</sub> was synthesised by hydroformylation of tetrabromophenyl porphyrin (TBPP), amination of trichothecenes (TC), and linking of the two compounds through Schiff base reaction. The comprehensive characterization of COF<sub>_PP-TAT</sub> showed that has rich pore structure and specific adsorption of CO<sub>2</sub>. These characteristics are favorable for COF to synthesize urea by reducing CO<sub>2</sub> in a green way. COF<sub>_PP-TAT</sub> exhibited a good CO<sub>2</sub> reduction (CO<sub>2</sub>RR) performance under photoelectrocatalytic (PEC) conditions with the stable production of urea (NH<sub>2</sub>CONH<sub>2</sub>) at a rate of 0.32 µmol h<sup>-1</sup>. That process accompanied by the production of ammonia (NH<sub>3</sub>), formic acid (HCOOH) and carbon monoxide (CO). The synthesis mechanism was discussed.</p>

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A porphyrin-based COF to reduce CO2 and nitrite in situ for photoelectrochemical catalysis synthesis of urea

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月1日

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  • Yi Liu,
  • Zijian Zeng,
  • Ruizhi Peng,
  • Kexin Ma,
  • Yun Li,
  • Zhihong Yan

摘要

Photoelectrocatalytic catalysis of carbon dioxide (CO2) and nitrite (NO2−) direct coupling to synthesise urea (NH2CONH2) can effectively avoid the high energy consumption and pollution of the Bosch-Meiser method. COF_PP-TAT was synthesised by hydroformylation of tetrabromophenyl porphyrin (TBPP), amination of trichothecenes (TC), and linking of the two compounds through Schiff base reaction. The comprehensive characterization of COF_PP-TAT showed that has rich pore structure and specific adsorption of CO2. These characteristics are favorable for COF to synthesize urea by reducing CO2 in a green way. COF_PP-TAT exhibited a good CO2 reduction (CO2RR) performance under photoelectrocatalytic (PEC) conditions with the stable production of urea (NH2CONH2) at a rate of 0.32 µmol h-1. That process accompanied by the production of ammonia (NH3), formic acid (HCOOH) and carbon monoxide (CO). The synthesis mechanism was discussed.