Synergistic effect between La-Ni bimetallic oxides for the efficient decomposition of hydrogen peroxide

La-Ni bimetallic oxides, including LaNiO3 and La2NiO4, were prepared by a facile co-precipitation process, followed by calcination treatment. The formation process of these two La-Ni bimetallic oxides was traced by X-ray diffraction, and the calcination temperature was determined to have a crucial influence on the composition and crystalline structure of the final sample. These as-prepared La-Ni bimetallic oxides were used as catalysts for the decomposition of hydrogen peroxide. Benefiting from the synergistic effect between La and Ni, these La-Ni bimetallic oxides showed superior catalytic ability than the single-components oxides such as La2O3, Ni2O3, and NiO. Additionally, the La-Ni bimetallic oxides exhibited efficient catalytic activity after reusing them several times, showing a desirable cyclic performance. Moreover, the kinetics of the reaction was investigated. The activation energy of this reaction significantly decreased under the catalysis from the as-prepared La-Ni bimetallic oxides, further confirming the promising catalytic potential of these La-Ni bimetallic oxides.

Automated summary

La-Ni bimetallic oxides, prepared through co-precipitation and calcination treatment, exhibit superior catalytic performance in decomposing hydrogen peroxide, with good recycling ability. The synergistic effect between La and Ni contributes to their promising catalytic potential.