Anthropogenic carbon dioxide (CO2), primarily arising from fossil fuel combustion in automobiles and industrial plants, makes up for the vast majority of greenhouse gas emissions and is the largest contributor to global warming . Aiming to mitigate CO2 emissions into the atmosphere, it has been proposed to develop and implement CO2 conversion and utilization (CCU) as an important part of CO2 management strategies. Among the topmost CO2 catalytic conversion processes, the hydrogenation of CO2 to CH4, so-called CO2 methanation or Sabatier reaction, is particularly promising because of its favorable thermodynamics. Additionally, the transportation of CH4 is readily feasible through existing infrastructure of natural gas pipelines . Ultimately, it can pave the way for achieving a carbon-neutral energy balance via the process referred to as Power-to-Gas (PtG). In this process, surplus green electricity (from wind or solar energy) is utilized in H2O electrolysis to generate green H2, which is then used to convert captured CO2 to CH4 .