Cawd-329 ((top)) 🔥 Recent

| Feature | Description | |---------|-------------| | | Catalytic‑Adsorptive Water‑Derived polymer 329 | | Chemical class | A hybrid polymer‑metal‑organic framework (MOF) functionalized with nano‑scale copper‑oxide clusters | | Form factor | Powder (≤ 200 µm) and monolithic pellets (10–30 mm) | | Key performance metrics | • CO₂ uptake: 5.8 mmol g⁻¹ at 1 bar, 25 °C • Turnover frequency (TOF) for CO₂ → methanol: 12 h⁻¹ • Stability: > 10 000 h continuous operation (no loss of activity) | | Synthesis route | One‑pot aqueous polymerization using renewable lignin as the carbon backbone, followed by in‑situ incorporation of Cu₂O nanoclusters via a green precipitation step. No organic solvents or hazardous reagents. | | Patents | US 11,983,412; EP 3,945,721; CN 115678901 (all filed early 2025) |

| Step | Description | |------|-------------| | | CO₂ molecules bind to Cu⁺ sites via a η¹‑CO₂ coordination. The adjacent hydroxyl groups stabilize the intermediate. | | Electron transfer | Upon applying a modest voltage (or illumination with visible light in the photo‑electrochemical variant), electrons flow from the external circuit to the copper sites, reducing Cu⁺ → Cu⁰. | | Protonation | Water splits on the copper surface, delivering protons (H⁺) and additional electrons. | | C–O bond cleavage | The formate intermediate is formed, then hydrogenated to formaldehyde and finally to methanol . | | Desorption | Methanol, being less polar than CO₂, diffuses out of the pores and is collected downstream. | cawd-329

The material’s (micro‑ + mesopores) ensures rapid mass transport while keeping the catalytic sites well‑dispersed, preventing agglomeration that would otherwise deactivate the material. | Feature | Description | |---------|-------------| | |