Organic chemical hydrides are one of the most promising methods for hydrogen storage, but aromatic compound remains unreacted after the hydrogenation process due to equilibrium limitations. We attempted to develop a solid-state adsorbent which could selectively adsorb toluene from methylcyclohexane (MCH) _ toluene mixture. Several La-based oxides were tested and La0.8Ba0.2CoO3 δ (LBCO) was found to exhibit high adsorption and selectivity for toluene. Analyses of the electronic state and adsorption state of toluene found part of the Co ions in the LBCO lattice were Co 4 . Co 4 in the lattice and surface lattice oxygen are important for the selective adsorption of toluene.
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