Electrochemical reactions of La(Ni,Cr)O3 and La(Ni,Fe)O3 in acidic aqueous solutions
Electrochemical reactions of La(Ni,Cr)O3 and La(Ni,Fe)O3 in acidic aqueous solutions
复制标题
La(Ni,Cr)O3 和 La(Ni,Fe)O3 在酸性水溶液中的电化学反应
DOI:
--
复制
发表时间:
1999
期刊:
影响因子:
--
通讯作者:
T. Grygar
中科院分区:
文献类型:
--
作者:
T. Grygar
Abstract Voltammetry of immobilised microcrystalline perovskites La(Ni,Cr)O3 and La(Ni,Fe)O3 revealed that these oxides yield three types of reactions in acidic aqueous solutions (0.1 M HClO4): irreversible oxidative dissolution of Cr-rich oxides, irreversible reductive dissolution of Fe-rich oxides, and a quasi-reversible reaction most likely related to alteration of the valencies of Cr, Fe and/or Ni in the solid state. The samples of La(Cr1−xNix)O3 with x = 0.3 and 0.5 especially showed limited cycling stability that is particularly surprising in the very strongly acidic solution.