Porous Graphene-Confined Fe-K as Highly Efficient Catalyst for CO2 Direct Hydrogenation to Light Olefins

Tijun Wu; Jun Lin; Yi Cheng; Jing Tian; Shunwu Wang; Songhai Xie; Yan Pei; Shirun Yan; Minghua Qiao; Hualong Xu; Baoning Zong

doi:10.1021/acsami.8b05411

Porous Graphene-Confined Fe-K as Highly Efficient Catalyst for CO₂ Direct Hydrogenation to Light Olefins

ACS Appl Mater Interfaces. 2018 Jul 18;10(28):23439-23443. doi: 10.1021/acsami.8b05411. Epub 2018 Jul 2.

Authors

Tijun Wu¹, Jun Lin², Yi Cheng¹, Jing Tian¹, Shunwu Wang¹, Songhai Xie¹, Yan Pei¹, Shirun Yan¹, Minghua Qiao¹, Hualong Xu¹, Baoning Zong³

Affiliations

¹ Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials , Fudan University , Shanghai 200433 , P. R. China.
² Key Laboratory of Nuclear Analysis Techniques, Shanghai Institute of Applied Physics , Chinese Academy of Sciences , Shanghai 201800 , P. R. China.
³ State Key Laboratory of Catalytic Materials and Chemical Engineering , Research Institute of Petroleum Processing, SINOPEC , Beijing 100083 , P. R. China.

PMID: 29956535
DOI: 10.1021/acsami.8b05411

Abstract

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 μmol_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.

Keywords: CO2; hydrogenation; light olefins; porous graphene; potassium-promoted iron.