4.7 Article

Selective photocatalytic CO2 reduction to CH4 over metal-free porous polyimide in the solid-gas mode

Journal

CHEMICAL COMMUNICATIONS
Volume 58, Issue 99, Pages 13716-13719

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d2cc04701b

Keywords

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Funding

  1. National Research Foundation of Korea (NRF) [2021M3I3A1085039, 2021R1A2C2009459, 5199991614244]
  2. DST-INSPIRE [GAP-0799]
  3. CSIR India [HRDG/YSA-19/02/21(0045)/2019, 34/1/TD-CLP/NCP-FBR 2020-RPPBDD-TMD-SeMI]
  4. UK Catalysis Hub - EPSRC grant [EP/R026939/1, EP/R026815/1, EP/R026645/1, EP/R027129/1, EP/M013219/1]
  5. CSIR-IICT, Hyderabad [IICT/Pubs./2022/229]
  6. National Research Foundation of Korea [2021R1A2C2009459, 2021M3I3A1085039] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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A new porous polyimide photocatalyst PeTt-POP was developed using a catalyst-free approach, which can convert CO2 to CH4 under visible light irradiation without the use of additional co-catalysts or sacrificial agents. The progress of the reaction and the related intermediate species were identified through operando DRIFTS experiments, and a plausible reaction mechanism was proposed.
Using a catalyst-free one-pot polycondensation approach, a new donor-acceptor (D-A) based porous polyimide (PeTt-POP) photocatalyst was developed. PeTt-POP produced CH4 (125.63 ppm g(-1) in 6 h) from CO2 under visible light irradiation in the gas-solid mode without the use of co-catalysts or sacrificial agents. The progress of the reaction and the corresponding intermediate species involved in the CO2 reduction were identified by operando DRIFTS experiments, from which a plausible reaction mechanism was proposed.

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