With the increase in CO2 concentration in the atmosphere, the global warming problems are becoming more and more serious. Conversion of CO2 to useful chemicals and fuels may be one of the promising ways to mitigate the problem. Most of the existing research focuses on CO2 hydrogenation to methanol because methanol is an important feedstock for the organic chemical industry and a potential alternative to fossil fuels [1] and [2]. Based on the great significance of methanol synthesis from CO2 hydrogenation, a new concept of “methanol economy” was proposed by Olah et al. [