| Pt/Ce_(0.6)Zr_(0.4)O_2催化剂催化氧化碳烟过程中活性氧对NO-NO_2循环及表面含氧物种的分解作用(英文) | |
| 刘爽 ; 吴晓东 ; 林雨 ; 李敏 ; 翁端 ; Shuang Liu ; Xiaodong Wu ; Yu Lin ; Min Li ; Duan Weng | |
| 2016-03-30 ; 2016-03-30 | |
| 关键词 | 铂催化剂 铈锆复合氧化物 碳烟氧化 一氧化氮-二氧化氮循环 表面含氧物种 Platiumn-based catalyst Ceria-zirconia mixed oxide Soot oxidation Nitrogen monoxide-nitrogen dioxide recycling Surface oxygenated species TQ426 |
| 其他题名 | Active oxygen-assisted NO-NO_2 recycling and decomposition of surface oxygenated species on diesel soot with Pt/Ce_(0.6)Zr_(0.4)O_2 catalyst |
| 中文摘要 | 通过在Ce0.6Zr0.4O2载体上浸渍Pt(NO3)2制得Pt/Ce0.6Zr0.4O2催化剂,该催化剂在松散接触条件下,于NO + O2或O2气氛中均表现出比Pt/Al2O3更好的碳烟氧化性能.进一步研究表明,Pt/Ce0.6Zr0.4O2催化剂中的Pt与Ce0.6Zr0.4O2存在相互作用,使得催化剂在一定温度范围内对活性氧的利用率大为提高,从而促进了气氛中NO ? NO2的循环,乃至碳烟与NO2的反应和碳烟表面含氧中间物种的生成;更重要的是,这部分活性氧本身可加速含氧中间物种的分解.因此,在NO + O2的气氛中,Pt/Ce0.6Zr0.4O2催化剂的碳烟起燃温度比Pt/Al2O3降低了34 °C.; A Pt/Ce0.6Zr0.4O2 catalyst was synthesized by impregnating a Ce0.6Zr0.4O2 support with Pt(NO3)2 solution.This material exhibits higher catalytic activity than Pt/Al2O3 for soot oxidation under loose contact conditions in both NO + O2 and O2 atmospheres.The results show that the pronounced activity of this catalyst is attributed to a synergistic effect arising from the combination of Pt and Ce0.6Zr0.4O2 solid solution,leading to a remarkable increase in the availability of active oxygen at temperatures as low as 450 癈.The NO-NO2 recycling efficiency is improved over Pt/Ce0.6Zr0.4O2catalyst,enhancing the ability of the NO2-soot reaction to generate surface oxygenated complexes(SOCs) on the soot.More importantly,the catalytic oxidation of these SOCs can be accelerated with the participation of active oxygen from the CeO2-ZrO2 solid solution.As a result,during soot oxidation under NO + O2,the light-off temperature of the Pt/Ce0.6Zr0.4O2 catalyst is lowered by 34 癈 than that of Pt/Al2O3 catalyst. |
| 语种 | 英语 ; 英语 |
| 内容类型 | 期刊论文 |
| 源URL | [http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/141657]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 刘爽,吴晓东,林雨,等. Pt/Ce_(0.6)Zr_(0.4)O_2催化剂催化氧化碳烟过程中活性氧对NO-NO_2循环及表面含氧物种的分解作用(英文)[J],2016, 2016. |
| APA | 刘爽.,吴晓东.,林雨.,李敏.,翁端.,...&Duan Weng.(2016).Pt/Ce_(0.6)Zr_(0.4)O_2催化剂催化氧化碳烟过程中活性氧对NO-NO_2循环及表面含氧物种的分解作用(英文).. |
| MLA | 刘爽,et al."Pt/Ce_(0.6)Zr_(0.4)O_2催化剂催化氧化碳烟过程中活性氧对NO-NO_2循环及表面含氧物种的分解作用(英文)".(2016). |
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