Catalytic Conversion of Carbon Dioxide to Value-Added Chemicals

Carbon dioxide, an abundant greenhouse gas, can be transformed into a wide array of chemicals and materials through catalytic processes that both mitigate emissions and create economic value. Central to this endeavour are strategies for activating the thermodynamically stable CO₂ molecule under mild conditions, employing catalysts that guide its conversion into carbon–carbon or carbon–heteroatom bonds. Homogeneous catalysts—often based on metal complexes—enable precision in bond formation, while heterogeneous systems, including porous frameworks and supported nanoparticles, offer durability and recyclability. Photocatalytic and electrocatalytic routes harness light or electricity to drive CO₂ reduction into fuels such as methanol and formate, or into intermediates for further chemical synthesis. Ring-opening copolymerisation of CO₂ with epoxides yields polycarbonate materials, and cycloaddition to epoxides produces cyclic carbonates, both serving as green intermediates for pharmaceuticals, agrochemicals and polymeric elastomers. Key challenges lie in lowering overpotential, improving catalyst turnover and selectivity, and scaling these processes to industrially relevant volumes. Recent advances in tandem catalysis, multifunctional catalyst architectures and integrated reactor design point towards a circular carbon economy in which CO₂ is not merely sequestered but valorised into everyday products.

Research from Nature Portfolio

Recent studies have explored CO₂ as a versatile C1 building block in organic synthesis, demonstrating catalytic systems that activate CO₂ under ambient pressure to form carboxylates, carbamates and cyclic carbonates. Innovations in tandem catalytic frameworks integrate multiple active sites in a single scaffold, enabling sequential epoxidation and cycloaddition of CO₂ to yield enantiomerically pure cyclic carbonates in one pot. Another significant development is the creation of bio-based polycarbonates derived from renewable monomers and CO₂, which serve as a platform for post-polymerisation modifications. These systems combine green feedstocks with high atom economy, offering tunable mechanical, thermal and functional properties while maintaining process simplicity and cost-effectiveness.

Catalytic Conversion of Carbon Dioxide to Value-Added Chemicals publication trend

The graph below shows the total number of articles in catalytic conversion of carbon dioxide to value-added chemicals across all publications each year (not limited to Nature Index journals).

Technical terms

Catalyst turnover: The number of substrate molecules converted per active site over a given time, indicating catalyst efficiency.

Ring-opening copolymerisation (ROCOP): A polymerisation method in which CO₂ and a cyclic monomer (e.g., an epoxide) open and link together to form polycarbonates.

Homogeneous catalysis: Catalytic reactions where the catalyst and reactants are in the same phase, often enabling precise control over reactivity.

Heterogeneous catalysis: Catalytic processes where the catalyst is in a different phase (typically solid) from the reactants, facilitating separation and reuse.

Cyclic carbonate: A five- or six-membered ring compound formed by cycloaddition of CO₂ and an epoxide, used as green solvents and polymer precursors.

Tandem catalysis: A strategy that combines two or more mechanistically distinct reactions in one reactor to improve efficiency and selectivity.

References

1. Toughening CO2‐Derived Copolymer Elastomers Through Ionomer Networking. Advanced Materials (2023).
2. Using carbon dioxide as a building block in organic synthesis. Nature Communications (2015).
3. Ring-opening copolymerization (ROCOP): synthesis and properties of polyesters and polycarbonates. Chemical Communications (2015).
4. Metal–Organic Framework-Based Catalysts: Chemical Fixation of CO2 with Epoxides Leading to Cyclic Organic Carbonates. Frontiers in Energy Research (2015).
5. Polyoxometalate-based homochiral metal-organic frameworks for tandem asymmetric transformation of cyclic carbonates from olefins. Nature Communications (2015).
6. Bio-based polycarbonate as synthetic toolbox. Nature Communications (2016).
7. Cyclic carbonates synthesised from CO2: Applications, challenges and recent research trends. Current Opinion in Green and Sustainable Chemistry (2021).
8. Switchable Catalysis Improves the Properties of CO2‑Derived Polymers: Poly(cyclohexene carbonate‑b‑ε-decalactone‑b‑cyclohexene carbonate) Adhesives, Elastomers, and Toughened Plastics. Journal of the American Chemical Society (2020).