With the recent demand to reduce CO
2 emissions into the atmosphere, a method has been proposed to capture and utilize CO
2 by converting it to CH
4 (Methanation) and other hydrocarbons. The methanation is known as the Sabatier reaction. Specifically, CH
4 is synthesized from hydrogen produced using renewable energy and anthropogenic CO
2. However, this reaction requires high temperatures (300-400°C) in the presence of catalysts such as Ni. Therefore, a highly efficient methane production catalyst is desired, and it is desirable to lower the reaction temperature or to convert the reaction to other processes. BaTiO
3 is a piezoelectric material and polarization occurs when physical pressure is applied. The polarization causes charge bias on the surface, which might catalyze chemical reactions. In this study, we investigated the possibility of CO
2 reduction and methanation at low temperatures by utilizing the piezoelectric effect invoked by ball-milling (BM) of BaTiO
3 powder. As a result, CH
4 generation was confirmed, and it was suggested that the rate of CH
4 generation was slightly dependent on BM time. It is considered that the pressure applied to the powder by the BM caused a piezoelectric effect, resulting in CO
2 reduction and concomitant CH
4 generation.
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