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Junjiang Zhu, Zhen Zhao, Dehai Xiao, Jing Li, Xiangguang Yang, Yue Wu

CO Oxidation over the Perovskite-Like Oxides La_2−xSr_xMO₄ (x = 0.0, 0.5, 1.0; M = Cu, Ni): A Study from Cyclic Voltammetry

Correlations between the catalytic performance and the electrochemical properties in heterogeneous catalysis were observed, using perovskite-like oxides La_2−xSr_xMO₄ (x = 0.0, 0.5, 1.0, M = Cu, Ni) as the model catalysts and CO oxidation as the probe reaction. For a reaction that contains reducing agent in the feed gas, the activity depends mainly on the area of redox peak in the CV curves, while has no much relation to the symmetry of the redox potentials. The irreversible cycle in the first CV curves of LaSrCuO₄ suggested that the first step of the reaction is adsorption, corresponding to Mⁿ⁺ (Cu²⁺) to M⁽ⁿ⁺¹⁾⁺ (Cu³⁺).

Zeitschrift für Physikalische Chemie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0942-9352
Volume: 219, 06/2005
Pages: 807 - 815

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