CO-Induced Reverse Lattice Oxygen Spillover on Pt/CeOEnables Sulfur-Resistant Dry Reforming of Methane.

Source: PubMed, NCBI / U.S. National Library of Medicine

Angewandte Chemie (International ed. in English)Liu Jun, Deng Jiang, Zheng Jiajia, et al.Published 5/31/2026Last synced 6/1/2026Status: syncedPMID: 42218754DOI: 10.1002/anie.1664469

Overcoming sulfur poisoning in dry reforming of methane (DRM), which is a critical process for biogas upgrading, is particularly challenging. In this study, we illustrate that a reverse lattice oxygen spillover (RLOS) from CeOto Pt on the Pt-O-Ce interface, induced by CO, can oxidize S into SO, aiding in the removal of S deposits. A low oxygen migration barrier at the Pt-O-Ce interface and Pt's high activity for oxidizing sulfur to SOmake Pt/CeOuniquely effective at self-recovering after HS poisoning. Furthermore, the atomically dispersed Pt/CeOcatalyst undergoes reaction driven adaptive restructuring, which amplifies the RLOS effect and enables dynamic S deposition and removal. As a result, the catalysts maintain constant DRM activity for 100 h, even in the presence of HS. This discovery paves the way for designing catalysts that resist sulfur poisoning in HS-containing streams.

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