Global warming has been an important concern worldwide scenario. Greenhouse gases like CO 2 mainly contribute to the step-up in average global temperature. The scientists, attempts have been made to reduce the CO 2 content in the atmosphere [ 1 ].  The conversion of CO 2 to valuable chemicals such as CO, CH 4 , and CH 3 OH, has drawn great attention for use in supporting carbon capture and utilization (CCU). CO 2 was converted into methane at low temperatures with an electric field (EF), which was reported in Chem. Lett. on January (2020) by Prof. Y Sekine and his team from Applied Chemistry, Waseda University, Tokyo, Japan. Results show that 5 wt%Ru/CeO 2 catalyst exhibited high and stable catalytic activity for CO 2 methanation with the electric field [ 2 ]. Methane (CH 4 ) can be used not only as fuel but also as a hydrogen carrier via transportation in existing infrastructure for town gas. Especially in Germany, some plants have already been launched based on the concept o...