Pd/Al_2O_3 catalysts modified with Mg for catalytic combustion of methane:Effect of Mg/Al mole ratios on the supports and active PdO_x formation
Pd/Al_2O_3 catalysts modified with Mg for catalytic combustion of methane:Effect of Mg/Al mole ratios on the supports and active PdO_x formation
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Mg修饰的Pd/Al_2O_3催化剂用于甲烷催化燃烧:Mg/Al摩尔比对载体和活性PdO_x形成的影响
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Jiang Lilong
中科院分区：
文献类型：
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作者：
Zhan Yingying;Kang Liang;Zhou Yuchang;Cai Guohui;Chen Chongqi;Jiang Lilong
制备了不同Mg含量的Pd/Al_2O_3催化剂，用于甲烷催化燃烧（CCM）反应.在Pd/Al_2O_3催化剂中引入不同含量的Mg后，形成了类Al_2O_3、MgAl_2O_4混合氧化物和Mg（Al）O_x固溶体，由于不同载体的形成，形成了负载型Pd物种，即金属Pd、PdO_x和载体-Pd氧化物复合物，结果表明，PdOx在低温下具有活性，而金属Pd颗粒和载体-Pd氧化物复合物在高温下具有活性，Mg/Al摩尔比为1 ∶3的催化剂最容易发生PdParticPdO的转化，对CCM反应的催化活性最高。
Pd/Al_2O_3 catalysts modified by different amount of magnesium were fabricated for catalytic combustion of methane (CCM).After the introduction of different amount of magnesium,Al_2O_3,MgAl_2O_4-like mixed oxide and Mg(Al)O_x solid solution were formed.Owing to the formation of distinguished supports,the supported Pd species,i.e.metallic Pd,PdO_x and support-Pd oxide complex were formed,and they were quite different in relative content and Pd↔PdO transformation ability.It was found that PdO_x was active at low temperature,while metallic Pd particles and support-Pd oxide complex were active at high reaction temperature.The one with Mg/Al mole ratio of 1 ∶3 was the most easily in Pd↔PdO transformation,demonstrating the best catalytic activity towards CCM reaction.