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tfwd2007

木虫 (著名写手)

我做了CO-TPD, 不可以看作是CO-TPSR吗?

我做了CO-TPD, 具体为:
Temperature-programmed measurements were performed on a conventional CO-TPD instrument. In order to remove the pollutants adsorbed on the sample, the catalyst (0.1 g) was loaded in a quartz reactor and heated in He flow at 250 °C for 2 h; under the flowing He gas (40 mL min-1), the system was cooled to room temperature. The sample was then saturated with CO at room temperature for 0.5 h, and the excess of adsorbates were removed by allowing the sample to remain in a He flow until no significant amount of adsorbates could be detected. The temperature was ramped to 800 °C at a linear heating rate of 20 °C min-1. A Mass spectrum (MS) was used to monitor the variations of the m/e ratio of CO (28) to CO2 (44).
MS分析得到了CO 和 CO2 脱附信号
在LaMnO3催化剂CO氧化反应呢,程序升温指一定温度时,CO被LaMnO3晶格氧氧化,产生了CO2信号。

不可以看作是CO-TPSR吗?
11楼2008-12-15 16:01:53
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太空堡垒

希望做TPD 、TPO或TPSR的朋友留个联系方式!

或直接加我QQ675987491

                                          东风有限  李华
12楼2009-04-15 08:58:03
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化学041

荣誉版主 (知名作家)

小虫虫

引用回帖:
Originally posted by duyuhai at 2008-12-12 14:46:
TPD:程序升温脱附
TPSR:程序升温选择性还原??
还是TPRS:程序升温反应谱??
---------------------------------------------
不足或不正确的地方,楼下请补充,谢谢

TPSR是程序升温表面反应吧!
我爱宝宝……
13楼2009-04-15 09:14:32
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化学041

荣誉版主 (知名作家)

小虫虫

引用回帖:
Originally posted by ratio at 2008-12-12 16:06:



正解。
从名称上就可以看出来,二者最大的区别在于对催化剂表征的目的上,一个是吸附性能,一个是反应性能。

严重支持!
我爱宝宝……
14楼2009-04-15 09:15:43
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zhangwengui330

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优秀版主

引用回帖:
Originally posted by tfwd2007 at 2008-12-15 16:01:
我做了CO-TPD, 具体为:
Temperature-programmed measurements were performed on a conventional CO-TPD instrument. In order to remove the pollutants adsorbed on the sample, the catalyst (0.1 g) was lo ...

不能看做TPSR,不能等同,但是这个TPD信息可以给出TPSR类似的结果。
15楼2009-04-15 23:06:11
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