Pt‐Mo₂N Catalyst Formed by Inverse Sintering for the Reverse Water‐Gas Shift Reaction

Abstract The reverse water‐gas shift (RWGS) reaction is significant for the resource utilization of CO 2 . However, this reaction requires high temperatures and metal catalysts are prone to agglomeration, leading to loss of activity. In this work, a Pt catalyst supported on Mo₂N formed via phase transition and metal reverse sintering under a high‐temperature NH₃ atmosphere is developed. This catalyst exhibits excellent RWGS activity, achieving a CO production rate of 294.8 mmolg cat −1 h −1 at 623 K, with CO selectivity maintained at 93%. Moreover, under continuous testing conditions for 100 h, the catalyst's activity shows no significant decline. Notably, further investigation reveals that the surface reaction mechanism at 623 K differs from the previously reported associative mechanism, instead following a redox mechanism in the presence of H₂. This research not only provides a deeper theoretical understanding of the mechanism of CO 2 hydrogenation but also offers valuable insights for developing novel and efficient metal catalyst regeneration technologies.