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首页> 外文期刊>Journal of industrial and engineering chemistry >Catalytic performance of LaCo_(0.5)M_(0.5)O3 (M = Mn, Cr, Fe, Ni, Cu) perovskite-type oxides and LaCo_(0.5)Mn_(0.5)O3 supported on cordierite for CO oxidation
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Catalytic performance of LaCo_(0.5)M_(0.5)O3 (M = Mn, Cr, Fe, Ni, Cu) perovskite-type oxides and LaCo_(0.5)Mn_(0.5)O3 supported on cordierite for CO oxidation

机译：LaCo_（0.5）M_（0.5）O3（M = Mn，Cr，Fe，Ni，Cu）钙钛矿型氧化物和堇青石负载的LaCo_（0.5）Mn_（0.5）O3的催化氧化性能

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摘要

Catalytic combustion of CO over perovskite-type oxides LaCo_(0.5)M_(0.5)O3 (M = Mn, Cr, Fe, Ni, Cu) and LaCO0.5Mn0.5O3 supported on cordierite were investigated. The catalysts were synthesized by impregnation method with citrate and characterized by XRD, SEM and TPR. The LaCo_(0.5)Mn_(0.5)O3 catalyst showed much higher activity in CO oxidation compared with LaCo_(0.5)M_(0.5)O3 (M = Cr, Fe, Ni, Cu) due to different kinds of valence state and lattice oxygen content. When LaCo_(0.5)Mn_(0.5)O3 was supported on cordierite, the activity was improved significantly. However, calcining temperature and the presence of water vapor affected the catalytic activity due to sintering and competition of H2O with CO for adsorption, respectively.
机译：研究了钙钛矿型氧化物LaCo_（0.5）M_（0.5）O3（M = Mn，Cr，Fe，Ni，Cu）和负载在堇青石上的LaCO0.5Mn0.5O3上CO的催化燃烧。用柠檬酸盐浸渍法合成了催化剂，并用XRD，SEM和TPR进行了表征。与LaCo_（0.5）M_（0.5）O3（M = Cr，Fe，Ni，Cu）相比，LaCo_（0.5）Mn_（0.5）O3催化剂在CO氧化中表现出更高的活性，这是由于不同的化合价态和晶格氧内容。当LaCo_（0.5）Mn_（0.5）O3负载在堇青石上时，活性显着提高。然而，煅烧温度和水蒸气的存在分别由于烧结和H 2 O与CO竞争吸附而影响了催化活性。

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