| 预处理气氛对CuO/CeO2/γ-Al2O3催化剂表面性质及"NO+CO"反应性能的影响 |
| CuO/CeO2/γ-Al2O3 Catalysts: Effect of Pretreating Atmosphere on Surface Properties and Catalytic Performance in Selective Catalytic Reduction of NO with CO |
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| 摘要: 用不同的预处理气氛制备了CeO2/γ-Al2O3载体以调节表面Ce的价态,并以Cu(CH3COO)2为前驱体制备了CuCeAl催化剂.XRD和H2-TPR的结果表明在还原气氛下处理的CeO2/γ-Al2O3载体具有更多的活性氧原子,因此相应的CuCeAl催化剂表面有更多分散态的Cu2+/Cu+物种.NO+CO反应的结果表明分散态的Cu2+/Cu+是NO转化的活性物质,而Cu0在低温下具有较好的N2选择性.因此,同时含有分散态Cu2+/Cu+和少量晶相Cu0的催化剂具有最好的催化性能. |
| 关键词: 多相催化 氮氧化物 污染防治 预处理气氛 CeO2/γ-Al2O3 "NO +CO"反应 |
| 基金项目: 江苏省高校自然科学基金(No.12KJD530002)资助项目. |
| Abstract: The CeO2/γ-Al2O3 supports were prepared and pretreated in different atmospheres to adjust the valence state of surface Ce element, then Cu(CH3COO)2 was impregnated as the precursor to prepare CuCeAl samples. XRD and H2-TPR results indicate that the CeO2/γ-Al2O3 support pretreated by reducing atmosphere has more active oxygen atoms, consequently has more dispersed Cu2+/Cu+ species on the surface. The "NO+CO" reaction tests reveal that the dispersed Cu2+/Cu+ are the active species for NO conversion, while crystalline Cu0 promotes the N2 selectivity at low temperatures. Hence, the catalysts containing both dispersed Cu2+/Cu+ and a few crystalline Cu0 have the optimal catalytic efficiency. |
| Keywords: heterogeneous catalysis nitrogen oxides waste prevention pretreating atmosphere CeO2/γ-Al2O3 "NO+CO" reaction |
| 投稿时间：2014-07-03 修订日期：2014-10-15 |
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| 朱捷,葛奉娟.预处理气氛对CuO/CeO2/γ-Al2O3催化剂表面性质及"NO+CO"反应性能的影响[J].无机化学学报,2015,31(1):191-197. |
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