Future work may also focus on the stability of catalysts in a RWGS reaction. The stability of catalysts in this reaction has been rarely explored. Several stability tests have been performed under conditions near the thermodynamic equilibrium of CO2 conversion, which may mask the unstable nature of catalysts. The stability of catalysts is an important issue for a commercial process, so this parameter should be extensively investigated. Understanding the deactivation mechanism may also provide useful information for the rational design of stable catalysts in the RWGS reaction.