Elucidating the role of earth alkaline doping in perovskite-based methane dry reforming catalysts.

To elucidate the role of earth alkaline doping in perovskite-based dry reforming of methane (DRM) catalysts, we embarked on a comparative and exemplary study of a Ni-based Sm perovskite with and without Sr doping. While the Sr-doped material appears as a structure-pure SmSrNiO Ruddlesden Popper structure, the undoped material is a NiO/monoclinic SmO composite. Hydrogen pre-reduction or direct activation in the DRM mixture in all cases yields either active Ni/SmO or Ni/SmO/SrCO materials, with albeit different short-term stability and deactivation behavior.

Removal of Acid Brown 354 from wastewater by aminized cellulose acetate nanofibers: experimental and theoretical study of the effect of different parameters on adsorption efficiency.

Wastewater effluents usually involve dyes that are dangerous for aquatic life and other environments. Many of these dyes are toxic, carcinogenic, and can cause skin and eye irritation. In this study, firstly aminized cellulose acetate was prepared from cellulose acetate and applied for the adsorption of Acid Brown 354 from aqueous solutions.

Steering the Methane Dry Reforming Reactivity of Ni/LaO Catalysts by Controlled In Situ Decomposition of Doped LaNiO Precursor Structures.

The influence of A- and/or B-site doping of Ruddlesden-Popper perovskite materials on the crystal structure, stability, and dry reforming of methane (DRM) reactivity of specific ABO phases (A = La, Ba; B = Cu, Ni) has been evaluated by a combination of catalytic experiments, in situ X-ray diffraction, X-ray absorption spectroscopy (XAS), X-ray photoelectron spectroscopy (XPS), and aberration-corrected electron microscopy. At room temperature, B-site doping of LaNiO with Cu stabilizes the orthorhombic structure () of the perovskite, while A-site doping with Ba yields a tetragonal space group (4/). We observed the orthorhombic-to-tetragonal transformation above 170 °C for LaNiCuO and LaNiCuO, slightly higher than for undoped LaNiO.