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Electro-assisted methane oxidation to formic acid via in-situ cathodically generated H2O2 under ambient conditions.
- Source :
- Nature Communications; 8/5/2023, Vol. 14 Issue 1, p1-10, 10p
- Publication Year :
- 2023
-
Abstract
- Direct partial oxidation of methane to liquid oxygenates has been regarded as a potential route to valorize methane. However, CH<subscript>4</subscript> activation usually requires a high temperature and pressure, which lowers the feasibility of the reaction. Here, we propose an electro-assisted approach for the partial oxidation of methane, using in-situ cathodically generated reactive oxygen species, at ambient temperature and pressure. Upon using acid-treated carbon as the electrocatalyst, the electro-assisted system enables the partial oxidation of methane in an acidic electrolyte to produce oxygenated liquid products. We also demonstrate a high production rate of oxygenates (18.9 μmol h<superscript>−1</superscript>) with selective HCOOH production. Mechanistic analysis reveals that reactive oxygen species such as ∙OH and ∙OOH radicals are produced and activate CH<subscript>4</subscript> and CH<subscript>3</subscript>OH. In addition, unstable CH<subscript>3</subscript>OOH generated from methane partial oxidation can be additionally reduced to CH<subscript>3</subscript>OH on the cathode, and so-produced CH<subscript>3</subscript>OH is further oxidized to HCOOH, allowing selective methane partial oxidation. This study presents the electrochemically assisted partial oxidation of methane to produce liquid oxygenate, HCOOH, selectively which involves in-situ cathodically generated reactive oxygen species with an acid-treated carbon electrocatalyst. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 14
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Nature Communications
- Publication Type :
- Academic Journal
- Accession number :
- 169782413
- Full Text :
- https://doi.org/10.1038/s41467-023-40415-6