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Two typical K-supported oxides (K/Al2O3 and K/TiO2) were selected as catalysts for diesel soot combustion in order to evaluate the relationship between activity and stability. The surface species were first characterized by X-ray powder diffraction (XRD), X-ray absorption fine-structure (XAFS), infrared analysis (IR), X-ray photoelectron spectroscopy (XPS), in situ IR of CO2 adsorption and temperature-programmed...
The soot combustion on Cr-doped CeO 2 mixed oxides was studied. The catalysts were characterized by X-ray powder diffraction, N 2 adsorption/desorption, X-ray photoelectron spectroscopy and temperature-programmed reduction with H 2 . The active sites were quantified using isothermal anaerobic titrations with soot as the probe molecule. The turnover frequency (TOF) was calculated...
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