Abstract:
The dry reforming of methane (DRM), converting two primary greenhouse gases, CH
4 and CO
2, into syngas (H
2/CO), offers a pivotal route for valorizing greenhouse gases into high-value-added chemicals. However, DRM confronts challenges such as carbon deposition on the catalyst surface and sintering of active metal particles under high-temperature conditions, leading to deactivation. Consequently, there is an urgent need for a catalyst that is resistant to high temperatures, coke formation, and sintering to enhance the catalytic activity and stability of DRM. Due to their unique structures and superior physicochemical properties, carbides have found widespread application in electrocatalysis, thermal catalysis, and photo-thermal catalysis. Their noble-metal-like (Pt-like) characteristics, excellent thermal stability, good affinity with oxidants (CO
2 and H
2O), and strong metal-support interactions make carbides promising candidates for boosting the efficiency of the DRM reaction and extending the lifetime of the catalyst. The review covers the general reaction mechanisms and thermodynamic characteristics of conventional DRM catalysis, with a focus on the typical reaction mechanisms and applications of carbide materials in this process. Finally, the technical challenges and future directions for carbide-catalyzed DRM are proposed. The aim is to provide valuable guidance for the development of efficient and stable carbide-based DRM catalyst systems, fostering scientific research, technological innovation, and industrial application in this field.