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niuyufei1982

铁虫 (小有名气)


[交流] 【求助】passivation方法求助

做负载贵金属催化剂,看了点文献都说先在氢气中还原若干小时,然后就是passivated几个小时,不知道这个方法是怎么操作的,具体目的是什么?
文献一:……reduced in H2-N2 flow at 450℃ for 4h,and finally passivated in a flowing of CO2-N2 gas for 12h and stored.(载体 是SiO2)
文献二:the samples with different Ru content were reduced in an H2 ?ow at 450 ?C for 8 h, followed by cooling to room temperature in hydrogen and then passivation.(载体是GNF)
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niuyufei1982

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对于贵金属负载有什么好处吗?区别于负载Ni什么的?
比如在管式炉里还原的,就等温度降下来后放几个小时就算passivated了?
3楼2010-12-04 16:01:22
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solar散人

金虫 (正式写手)


niuyufei1982(金币+1): 2011-03-23 11:34:04
钝化处理,在非还原性气体中,或者就在原H2气氛中,久置就行了。
2楼2010-12-04 15:55:05
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