Electrochemical Splitting of Methane in Molten Salts To Produce Hydrogen. Issue 14 (3rd March 2021)

• Record Type: Journal Article
• Authors: Fan, Zeyu; Xiao, Wei
• Is Part Of: Angewandte Chemie international edition. Volume 60:Issue 14(2021)
• Page Start: 7664
• Page End: 7668
• Publication Date: 2021-03-03
• Subjects: CH4 oxidation -- hydrogen production -- in situ CO2 conversion -- methane conversion -- molten salt electrochemistry; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202017243
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Industrial hydrogen production based on methane steam reforming (MSR) remains challenges in intensive carbon emissions, retarded hydrogen generation owing to coke deposition over catalysts and huge consumption of water. We herein report an electrochemical splitting of methane (ESM) in molten salts at 500 °C to produce hydrogen in an energy saving, emission‐free and water‐free manner. Following the most energy‐saving route on methane‐to‐hydrogen conversion, methane is electrochemically oxidized at anode to generate carbon dioxide and hydrogen. The generated anodic carbon dioxide is in situ captured by the melts and reduced to solid carbon at cathode, enabling a spatial separation of anodic hydrogen generation from cathodic carbon deposition. Life‐cycle assessment on hydrogen‐generation technologies shows that the ESM experiences an equivalent carbon emission much lower than MSR, and a lower equivalent energy input than alkaline water electrolysis. Abstract : The electrochemical splitting of methane in molten salts at 500 °C has been demonstrated as an energy‐saving, coke‐free, CO2 ‐free, and water‐free preparation of H2 .