Hydrogen storage in proton-conductive perovskite-type oxides and their application

다국어 초록 (Multilingual Abstract)

Various mixed oxides having perovskite structure were prepared by co-precipitation and sol-gel methods.
The samples were calcined at 700 oC. The produced solids were characterized using X-ray diffraction analysis (XRD),thermogravimetry (TGA), differential thermal analysis (DTA), high resolution transmission electron microscope (HRTEM),nitrogen adsorption at −196 oC and hydrogen adsorption isotherms conducted at 100 oC. The results revealed the for-mation of nanosized mixed solids, namely LaNiO3, LaFeO3, LaCoO3, LaCu2O4 and LaCrO3 compounds with crystallitesize within 27-37 nm. The hysteresis loop of nitrogen adsorption isotherms of different investigated adsorbents indicateclearly the porous nature of different solids calcined at 700 oC. The most active candidate towards hydrogen uptakeis LaNiO3 prepared via sol-gel technique. Its adsorption capacity measured at 100 oC and 20 bar hydrogen pressureattained 1.7 wt%. So, LaNiO3 prepared via sol-gel technique could be considered as very promising material for hydrogenstorage.

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