Protocol for ambient CO₂ capture and conversion into HCOOH and NH₄H₂PO₄

Area of Science:

• Catalysis
• Materials Science
• Environmental Chemistry

Background:

• Carbon capture and utilization (CCU) is crucial for mitigating climate change.
• Converting captured CO2 into valuable products like fuels and chemicals is a key goal.
• Existing methods often require harsh conditions or are not cost-effective.

Purpose of the Study:

• To develop a protocol for capturing and converting CO2 into formic acid and ammonium dihydrogen phosphate.
• To synthesize and characterize an IRMOF3-derived carbon-supported PdAu heterogeneous catalyst (PdAu/CN-NH2).
• To demonstrate the efficient catalytic conversion of captured CO2 into formate under ambient conditions.

Main Methods:

• Synthesis of a PdAu/CN-NH2 heterogeneous catalyst derived from IRMOF3.
• Capture of CO2 using ammonium carbonate ((NH4)2CO3).
• Catalytic conversion of captured CO2 to formate using the synthesized catalyst at ambient conditions.

Main Results:

• Successful synthesis of the PdAu/CN-NH2 catalyst.
• Efficient capture of CO2 by (NH4)2CO3.
• Ambient condition conversion of CO2 to formate with high efficiency.
• Production of pure formic acid (HCOOH) solution and solid fertilizer (NH4H2PO4).

Conclusions:

• The developed protocol offers an attractive strategy for CO2 mitigation and valorization.
• The PdAu/CN-NH2 catalyst demonstrates high efficiency for CO2 conversion under mild conditions.
• This approach provides a pathway for producing valuable chemicals and fertilizers from CO2.