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Direct dehydrogenation of isobutane to isobutene has drawn extensive attention for synthesizing various chemicals. The Mo-based catalysts hold promise as an alternative to the toxic CrOx- and scarce Pt-based catalysts. However, the low activity and rapid deactivation of the Mo-based catalysts greatly hinder their practical applications. Herein, we demonstrate a feasible approach toward the development of efficient and non-noble metal dehydrogenation catalysts based on Mo-C-T hybrid nanowires calcined at different temperatures. In particular, the optimal Mo-C-700 catalyst exhibits isobutane consumption rate of 3.9 mmol g(-1) h(-1) and isobutene selectivity of 73% with production rate of 2.8 mmol g(-1) h(-1). The catalyst maintained 90% of its initial activity after 50 h of reaction. Extensive characterizations reveal that such prominent performance is well correlated with the adsorption abilities of isobutane and isobutene and the formation of eta-MoC species. In contrast, the generation of beta-Mo2C crystalline phase during long-term reaction causes minor decline in activity. Compared to MoO2 and beta-Mo2C, eta-MoC plays a role more likely in suppressing the cracking reaction. This work demonstrates a feasible approach toward the development of efficient and non-noble metal dehydrogenation catalysts.
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ACS APPLIED MATERIALS & INTERFACES
ISSN: 1944-8244
Year: 2018
Issue: 27
Volume: 10
Page: 23112-23121
8 . 4 5 6
JCR@2018
8 . 5 0 0
JCR@2023
ESI Discipline: MATERIALS SCIENCE;
ESI HC Threshold:284
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
WoS CC Cited Count: 14
SCOPUS Cited Count: 14
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
Affiliated Colleges: