Highly Active Ceria-Supported Ru Catalyst for the Dry Reforming of Methane: In Situ Identification of Ruδ+–Ce3+ Interactions for Enhanced Conversion

By Zongyuan Liu, Feng Zhang, Ning Rui, Xing Li, Lili Lin, Luis Betancourt, D. Su, Wenqian Xu, J. Cen, K. Attenkofer and 3 more. ACS Catalysis, 2019

210 citations recorded by the source corpus.

The metal–oxide interaction changes the surface electronic states of catalysts deployed for chemical conversion, yet details of its influence on the catalytic performance under reaction conditions remain obscure. In this work, we report the high activity/stability of a ceria-supported Ru–nanocluster (<1 nm) catalyst during the dry reforming of methane. To elucidate the structure–reactivity relationship underlying the remarkable catalytic performance, the active structure and chemical speciation of the catalyst was characterized using in situ X-ray diffraction (XRD) and X-ray absorption fine structure (XAFS), while the surface chemistry and active intermediates were monitored by in situ ambient-pressure X-ray photoelectron spectroscopy (AP-XPS) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). Methane activates on the catalyst surface at temperatures as low as 150 °C. Under reaction conditions, the existence of metal–support interactions tunes the electronic properties of the Ru nan...

Subfields: Catalysis, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/83c3e3ba1792f6ce37c4bd58767750b26d49b882