Construction of MoOx‐C interface with two active sites by plasma for low‐temperature reverse water‐gas shift reaction

Abstract The design and synthesis of robust catalysts is the key to improving CO 2 conversion in the reverse‐water gas shift (RWGS). In this article, the MoO x ‐C catalyst supported on AlOOH (xMoO x ‐C@AOH) is designed and synthesized by dielectric barrier discharge (DBD) plasma. The Mo‐C bonds of the MoO x ‐C interface regulate the electronic structure of MoO x and promote the formation of oxygen vacancies. The catalyst evaluation and reaction kinetics of the xMoO x ‐C@AOH demonstrate excellent performance (CO 2 conversion 15.8% at 450°C) and superior selectivity toward CO (100%), without obvious deactivation within 100 h. The high activity of xMoO x ‐C@AOH is related to two active sites: Mo sites of Mo‐C are favorable for H 2 adsorption/dissociation; oxygen vacancies of MoO x promote the adsorption/dissociation of CO 2 . Two RWGS mechanisms are confirmed by DRIFTs: formate and direct CO 2 dissociation. This strategy of constructing the interface by DBD provides valuable insights to prepare high‐performance catalysts for RWGS.