In situ DRIFTs-based comprehensive reaction mechanism of photo-thermal synergetic catalysis for dry reforming of methane over Ru-CeO2 catalyst

• Published in: Journal of colloid and interface science Vol. 677; no. Pt A; pp. 863 - 872
• Main Authors: Zhang, Zhen-Yu, Xie, Tao
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.01.2025
• Subjects: catalysts; catalytic activity; Comprehensive reaction mechanism; Dry reforming of methane; industrialization; methane; Operando experiment; Photo-thermal catalysis; reaction mechanisms; Operando experiment; Comprehensive reaction mechanism; Dry reforming of methane; Photo-thermal catalysis
• ISSN: 0021-9797; 1095-7103; 1095-7103
• DOI: 10.1016/j.jcis.2024.08.019

[Display omitted] Solar-driven photo-thermal dry reforming of methane (DRM) is an environmentally friendly production route for high-value-added chemicals. However, the lack of thorough understanding of the mechanism for photo-thermal reaction has limited its further development. Here, we systematically investigated the mechanism of photo-thermal DRM reaction with the representative of Ru/CeO2 catalyst. Through in situ DRIFTs and transient experiments, comprehensive investigation into the reaction steps and their reactive sites in the process of DRM reaction were conducted. Besides, the excitation and migration direction of photo-electron was determined by ISI-XPS experiments, and the change of surface defect structure induced by light was characterized by ISI-EPR experiments. Based on the above results, the photo-enhancement effect on each micro-reaction step was determined. This study provides a theoretical basis for the industrialization of photo-thermal DRM reaction and its development of catalysts.