Actividad catalítica de metales de transición en la descomposición de peróxido de hidrógeno

Química Nova

José G. Carriazo¹  Luis. F. Bossa-benavides¹  Eliana Castillo¹ 

[1] ,Universidad Nacional de Colombia Facultad de Ciencias Departamento de QuímicaBogotá,Colombia

关键词: hydrogen peroxide;    transition metals;    catalysis by metals;   

DOI  :  10.1590/S0100-40422012000600006

来源: SciELO

【 摘 要 】

This paper compares the catalytic activities of some transition metal ions (Fe3+, Co2+, Cu2+, Ni2+, Zn2+) in the H2O2 decomposition in homogenous and heterogeneous processes, including solid mixed systems (Fe-Cu-Co/Al2O3, Fe-Cu/Al2O3, Fe-Co/Al2O3 and Co-Cu/Al2O3). The solids were characterised by X-ray diffraction to explore evolution of phases or possible changes. Different trends of the catalytic activity were observed: in homogeneous medium the most active species was Fe3+, whereas in heterogeneous one the higher activities were shown for Co/Al2O3 and Co-Cu/Al2O3. A strong cooperative effect for the Co-Cu/Al2O3 system was observed, which can be considered as a new catalyst of interest for this type of reactions.

【 授权许可】

CC BY-NC   
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