AI Article Synopsis
- Formaldehyde is a key bulk chemical in the chemical industry typically produced through an energy-intensive process, but a new study presents a more efficient electrochemical method using an immobilized TEMPO electrode.
- The catalyst's performance can be optimized by adding different organic and inorganic bases, achieving a Faradaic efficiency of 97.5% and a turnover number of 17,100.
- The research also identified that the main limiting step in the process shifts from forming the carbonyl from the methanol-TEMPO adduct to regenerating the TEMPO species, indicating a need for further exploration in similar oxidation processes for other alcohols.
Article Abstract
In the chemical industry, formaldehyde is an important bulk chemical. The traditional synthesis of formaldehyde involves an energy intensive oxidation of methanol over a metal oxide catalyst. The selective electrochemical oxidation of methanol is challenging. Herein, we report a catalytic system with an immobilized TEMPO electrode that selectively oxidizes methanol to formaldehyde with high turnover numbers. Upon the addition of various organic and inorganic bases, the activity of the catalyst could be tuned. The highest Faradaic efficiency that was achieved was 97.5 %, the highest turnover number was 17100. Additionally, we found that the rate determining step changed from the step in which the carbonyl specie is created from the methanol-TEMPO adduct to the oxidative regeneration of the TEMPO species. Finally, we showed that the system could be applied to the oxidation of other aliphatic alcohols.
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| http://dx.doi.org/10.1002/cssc.202400582 | DOI Listing |
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