LAUSR

Abstract Since the Industrial Revolution, the heavy reliance on the limited fossil energy has emitted huge number of CO 2 into the air and led to a severely global warming. We propose a new green technology to moderate greenhouse gas CO 2 emission and transform it into low-carbon renewable energy in this paper. Through this manner, electricity is transformed into chemical energy. CO 2 and H 2 O is directly simultaneous electrolysis under constant 0.25 A with 30 cm 2 nickel anode and 30 cm 2 iron cathode in a 600 °C alkali carbonate with LiOH electrolyte in mole ratio of n H :n C  = 0.15:1, achieving the storage of electricity to chemical energy. This electrolysis provides a gaseous product comprising 45.9% methane, 53.1% H 2 , 0.92% CO and trace amounts of longer (than methane) hydrocarbons. Simultaneously, the current efficiency is still ∼51% for 60 min.