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Beyond disproportionation: Electrocatalytic upcycling of formaldehyde
Summary
Scientists have found a way to break down a common plastic (polyoxymethylene, found in things like plastic gears and fasteners) and turn its toxic byproduct, formaldehyde, into safer, useful chemicals like methanol and formic acid using an electricity-powered process. This matters because formaldehyde is a known health hazard linked to cancer and other health problems, so finding an efficient way to neutralize it while also recycling plastic waste could reduce both pollution and human exposure to harmful chemicals.
Plastic pollution is a significant environmental issue in the 21st century, and polyoxymethylene (POM) is a key component that needs upcycling into useful chemicals. POM undergoes depolymerization to produce a toxic chemical, formaldehyde. In a notable advancement, Ruquan Ye and co-workers demonstrated a one-pot electrochemical process that converts formaldehyde into formic acid at the anode and methanol at the cathode, utilizing Pt2Ru and a hydrophobic CuTAPc-layer catalysts, respectively with exceptional Faradaic efficiencies. Ruquan Ye and co-workers report one-pot depolymerisation of polyoxymethylene (POM) to formaldehyde in an acidic solution, and, in the same acidic medium, electrochemical conversion of formaldehyde to methanol (cathode) and formic acid (anode) in a single electrochemical cell, with remarkable Faradaic efficiencies.