脱氢
丙烯
催化作用
沸石
丙烷
化学
石脑油
选择性
光化学
无机化学
有机化学
作者
Junling Liu,Jingnan Wang,Yining Zhang,Weitao Zheng,Yongbin Yao,Qiang Liu,Xue‐Jing Zhang,Yongan Yang,Xi Wang
标识
DOI:10.1021/acscatal.3c04113
摘要
Propane dehydrogenation (PDH) presents a promising alternative to naphtha steam cracking processes for propene production. However, the current commercial catalysts are plagued by the toxicity of Cr (VI) and the exorbitant cost of Pt. We have developed an efficient, eco-friendly, and cost-effective catalyst (CoOx@MFI) in which reduction-resistant CoOx clusters are embedded in situ into the zeolite framework. This catalyst exhibits good catalytic performances (59.0% propane conversion and 93.0% propene selectivity) in PDH reactions, surpassing most Co-based catalysts and competing with Pt-based ones. Crucially, both in situ spectroscopy and theoretical calculations demonstrate that the MFI zeolite-stabilized Co–O moieties are highly favorable for C–H bond activation via an O atom as a Lewis base, which can attach to an H atom and generate [CoOH]+ intermediate with remarkable efficiency.
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