La-deficient La_1-xCe_xMnO₃ mixed oxides, obtained by selective dissolution in 1 ​M nitric acid, were employed in methane complete oxidation. The majority of the La cations in these perovskites were removed, resulting in increased specific surface areas, better reducibility and greater activity. Incorporation of a small amount of Ce stabilized the structure and a perovskite phase persisted in La-deficient La_1-xCe_xMnO₃ mixed oxides after 12 ​h of acid dissolution. La_0.95Ce_0.05MnO₃ after the acid treatment exhibited satisfactory catalytic activity, with T₅₀ and T₉₀ values of 365 and 459 ​°C, respectively, which was even comparable to that previously reported 1% Pd/Al₂O₃ catalysts. And it showed excellent long-term activity even in the presence of CO₂ and H₂O.

通过选择性溶解在 1 M 硝酸中获得的La 缺乏的 La _{1- x} Ce _x MnO ₃混合氧化物用于甲烷完全氧化。这些钙钛矿中的大部分 La 阳离子被去除，导致比表面积增加、还原性更好和活性更高。少量Ce的掺入稳定了结构，在酸溶解12小时后钙钛矿相仍然存在于缺La的La _1-x Ce _x MnO ₃混合氧化物中。La _0.95 Ce _0.05 MnO ₃酸处理后表现出令人满意的催化活性，T ₅₀和T ₉₀值分别为 365 和 459°C，甚至可以与之前报道的 1% Pd/Al ₂ O ₃催化剂相媲美。即使在 CO ₂和 H ₂ O存在下，它也表现出优异的长期活性。