Monolithic-like TiO2 nanotube supported Ru catalyst for activation of CH4 and CO2 to syngas

Highly-ordered TiO2 nanotube arrays (TiNTA) were prepared by an electrochemical anodization method and used as the carrier material to load 1 wt.% Ru. The Ru/TiNTA catalyst was then applied to the combination reactions of the partial oxidation of methane reaction (POM) with the carbon dioxide reforming with methane reaction (CRM) for syngas production. In comparison with the commercial TiO2 powder (P25) supported 1 wt.% Ru catalyst, Ru/TiNTA shows higher activity and much better stability. The superior performance of Ru/TiNTA is attributed to the specific monolithic-like structure and confinement effect of TiNTA.

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► Ru/TiNTA shows better activity and much higher stability than Ru/TiO2-P25.
► The better performance of Ru/TiNTA is related to the special structure of TiNTA.
► Ru nanoparticles are well confined in TiNTA for both the activated and spent samples.