Characterization and catalytic activity in NO decomposition of La2−xSrxCuO4 (0 ≤ x ≤1) compounds with T* phase structure

Compound of La2−xSrxCuO4 (x ≥ 0.5) with T* phase structure were prepared by conventional citric method. The split peak at 2θ = ∼31° in XRD patterns and the broad absorption band at 680 cm−1 with a shoulder peak at 620 cm−1 in IR spectra suggested the formation of T* phase in La2−xSrxCuO4 compounds at x ≥ 0.5. The amount of sample with T* phase structure increased with the increase of Sr content as certified by XRD patterns. Catalytic performance of La2−xSrxCuO4 for NO decomposition was investigated, and it was found, by correlating the solid-state properties and the activity of NO decomposition, that the presence of T* phase structure enhanced the catalytic activity of La2−xSrxCuO4 in NO decomposition.