Highly dispersed Pd on macroporous SmMn(2)O(5) mullite for low temperature oxidation of CO and C(3)H(8).
Highly dispersed Pd on macroporous SmMn(2)O(5) mullite for low temperature oxidation of CO and C(3)H(8).
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大孔SmMn2O5莫来石上高度分散的Pd用于CO和C3H8的低温氧化
DOI：
10.1039/c7ra11551b
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发表时间：
2018-01-29
期刊：
影响因子：
3.9
通讯作者：
Shan, Bin
中科院分区：
文献类型：
--
作者：
Zhu, Yuning;Du, Chun;Feng, Zijian;Chen, Yongjie;Li, Hang;Chen, Rong;Shen, Meiqing;Shan, Bin
在贫燃条件下研究了大孔SmMn 2 O 5莫来石负载钯催化剂（Pd/SMO-EG&M）对CO和C3 H8氧化反应的催化性能。采用XRD、拉曼、BET、CO化学吸附、SEM、FTEM、XPS、TPD、TPR和CO + O2脉冲等分析手段对其物理化学性能进行了研究。结果表明，添加Pd后，SmMn 2 O 5的晶体结构、形貌和比表面积（SSA）基本保持不变。Pd/SMO-EG&M对CO（105 °C）和C3 H8（350 °C）氧化表现出低的完全转变温度。TPR和TPD结果表明，Pd的高分散度（38.4%）提高了催化剂的还原性和氧物种的迁移率，从而提高了催化剂的氧化活性。Pd/SMO-EG&M在250 °C以上的高活性氧物种也加速了氧化能力。研究表明，大孔钯-莫来石催化剂在汽油车尾气净化方面具有潜在的应用价值。
The catalytic behavior of a palladium catalyst supported on macroporous SmMn2O5 mullite (Pd/SMO-EG&M) for CO and C3H8 oxidation was measured under lean-burn conditions. Different analytical techniques including XRD, Raman, BET, CO chemisorption, SEM, FTEM, XPS, TPD, TPR and CO + O2 pulse were undertaken to evaluate its physical and chemical properties. It was concluded that the crystal structure, morphology and specific surface area (SSA) of SmMn2O5 remained unchanged after Pd addition. The Pd/SMO-EG&M exhibited a low complete transformation temperature for CO (105 °C) and C3H8 (350 °C) oxidation. Such remarkable oxidation activity was attributed to high Pd dispersion (38.4%), which improved the reducibility and mobility of oxygen species, as revealed by TPR and TPD measurements. The high activity of oxygen species for Pd/SMO-EG&M above 250 °C accelerated the oxidation capacity as well. In a word, our study indicates that the macroporous Pd–mullite catalyst has potential applications in exhaust purification for gasoline vehicle.
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影响因子：
22.1
作者：
Giraudon, J. -M.;Elhachimi, A.;Leclercq, G.
通讯作者：
Leclercq, G.
影响因子：
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作者：
Doggali, Pradeep;Teraoka, Y.;Labhsetwar, Nitin
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影响因子：
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作者：
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通讯作者：
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影响因子：
5
作者：
Feng, Zijian;Liu, Qinhan;Shan, Bin
通讯作者：
Shan, Bin
影响因子：
7.3
作者：
Fino, D;Russo, N;Speechia, V
通讯作者：
Speechia, V