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jakey04520

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[求助] 请问,我的Ni-TiO2-C负载催化剂的TPR(H2)如何确定哪个是Active species 峰?

如题:我做的催化剂是Ni-TiO2包C的!但是做了H2的TPR后有3个峰,并且我进行了对比!见附件!

①Ni-TiO2
②Ni-C
③Ni-TiO2-C
催化效果:③>②>①
我对我的TPR③进行了归属:
问题1:320℃的应该是Bulk的还原峰!但是后面的450℃和540℃应该是Ni和C之间的相互作用的峰!但是如何论证?
问题2:还有就是我如何确定我的催化效果“Active species”来自哪个峰?
问题3:很多文献上记载说还原峰像低温移动才是催化效果好,这么说对吗?主流吗?

请问,我的Ni-TiO2-C负载催化剂的TPR(H2)如何确定哪个是Active species 峰?
Graph2.JPG
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