期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 28, 页码 23439-23443出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b05411
关键词
porous graphene; potassium-promoted iron; CO2; hydrogenation; light olefins
资金
- National Key R&D program of China [2017YFB0602204, 2016YFB0301600]
- National Natural Science Foundation of China [21373055]
- International Joint Laboratory on Resource Chemistry (IJLRC)
- Science & Technology Commission of Shanghai Municipality [08DZ2270500]
We devised iron-based catalysts with honeycomb structured graphene (HSG) as the support and potassium as the promoter for CO2 direct hydrogenation to light olefins (CO2-FTO). Over the optimal FeK1.5/HSG catalyst, the iron time yield of light olefins amounted to 73 mu mol(CO2) g(Fe)(-1) s(-1) with high selectivity of 59%. No obvious deactivation occurred within 120 h on stream. The excellent catalytic performance is attributed to the confinement effect of the porous HSG on the sintering of the active sites and the promotion effect of potassium on the activation of inert CO2 and the formation of iron carbide active for CO2-FTO.
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