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Electrochemical Splitting of Methane in Molten Salts To Produce Hydrogen
Author(s) -
Fan Zeyu,
Xiao Wei
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202017243
Subject(s) - methane , hydrogen production , hydrogen , anode , electrochemistry , carbon fibers , electrolysis , hydrogen fuel , steam reforming , inorganic chemistry , electrolysis of water , materials science , hydrogen purifier , high temperature electrolysis , methane reformer , chemical engineering , chemistry , electrode , organic chemistry , composite number , engineering , electrolyte , composite material
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.