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mkingl

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[交流] Ru 分散度 TPD

H2-TPD 如何测定Ru 的分散度,大家给下意见?
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pumpkinlan

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mkingl(金币+1): 谢谢参与
pzypdl: 金币+1, 谢谢回帖交流! 2013-05-22 22:27:29
先根据氢气脱附的面积计算出脱附出氢气的量,然后再根据H/Ru原子比的对应关系就可以计算出表面的钌金属原子数,最后除以催化剂中钌的量就可以了。
3楼2013-05-22 18:43:02
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942830144

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mkingl(金币+1): 谢谢参与
学习下
4楼2013-05-22 22:03:15
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luke_zhao

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mkingl(金币+1): 谢谢参与
missu001: 金币+1, 感谢交流 2013-05-23 08:30:22
Dispersion, % = (No. Surface Atoms / Total No. Atoms) x 100
When using supported metal catalysts, there are several molecules that can be selected to use as adsorbates. These include carbon monoxide, oxygen, hydrogen and nitric oxide. In all these cases, it is important to know:
• What is the metal atom to adsorbate gas stoichiometry?
• Does the molecule adsorb associatively or dissociatively?
• Does the support material play any part in the adsorption, i.e. is there spillover, or does the support play an active role in adsorption?

In order to calculate the metal dispersion, the ratio of adsorbate gas to metal sites must be known.
5楼2013-05-22 22:49:59
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mkingl

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我测脱附每次结果都不一样,容易受到水的干扰。老板说是钌的化学吸附量低,需要快速升温。大家有什么建议?

[ Last edited by mkingl on 2013-5-26 at 16:30 ]
7楼2013-05-26 16:25:07
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简单回复
2013-05-22 16:46   回复  
mkingl(金币+1): 谢谢参与
haixiawu6楼
2013-05-24 01:50   回复  
mkingl(金币+1): 谢谢参与
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