Geometric synergy of Steam/Carbon dioxide Co-electrolysis and methanation in a tubular solid oxide Electrolysis cell for direct Power-to-Methane

•Direct Power-to-CH4 using tubular solid oxide H2O/CO2 co-electrolysis cell.•Region division and geometrical synergy of electrochemical reduction and methanation.•Intensified synergy between geometry and physical–chemical fields.•Electricity-to-methane efficiency of 81% and CH4 yield of 95% for dire...

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