Korean Journal of Chemical Engineering

The Korean Institute of Chemical Engineers (한국화학공학회)
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Hydrogen storage in proton-conductive perovskite-type oxides and their application

  • Received : 2013.11.20
  • Accepted : 2014.03.14
  • Published : 2014.10.01
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Abstract

Various mixed oxides having perovskite structure were prepared by co-precipitation and sol-gel methods. The samples were calcined at $700^{\circ}C$. 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 $-196^{\circ}C$ and hydrogen adsorption isotherms conducted at $100^{\circ}C$. The results revealed the formation of nanosized mixed solids, namely $LaNiO_3$, $LaFeO_3$, $LaCoO_3$, $LaCu_2O_4$ and $LaCrO_3$ compounds with crystallite size within 27-37 nm. The hysteresis loop of nitrogen adsorption isotherms of different investigated adsorbents indicate clearly the porous nature of different solids calcined at $700^{\circ}C$. The most active candidate towards hydrogen uptake is $LaNiO_3$ prepared via sol-gel technique. Its adsorption capacity measured at $100^{\circ}C$ and 20 bar hydrogen pressure attained 1.7 wt%. So, $LaNiO_3$ prepared via sol-gel technique could be considered as very promising material for hydrogen storage.

Keywords

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