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Cooperative Catalysis of Nickel and Nickel Oxide for Efficient Reduction of CO2 to CH4
Bi, Qingyuan; Huang, Xieyi; Yin, Guoheng; Chen, Tianyuan; Du, Xianlong; Cai, Jun; Xu, Jing; Liu, Zhi; Han, Yifan; Huang, Fuqiang
2019-02-20
Source PublicationCHEMCATCHEM
ISSN1867-3880
Volume11Issue:4Pages:1295
SubtypeArticle
AbstractThe use of CO2 to produce value-added energy chemicals is a promising means for renewable CO2 transformation in low-carbon energy system, and CO2 methanation has attracted ever-increasing interest. Herein, we report that the Ni/MCM-41 catalyst with prominent cooperative effect of Ni and NiO is efficient for CH4 generation with CO2 conversion of 73.2 % and CH4 selectivity of 91.6 % at 400 degrees C and high gas hourly space velocity (GHSV) of 90000 mL g(cat)(-1) h(-1). Combined methodologies of in situ X-ray diffraction, diffuse reflectance infrared Fourier transform spectroscopy, and ambient-pressure X-ray photoelectron spectroscopy reflect the structural evolvements of Ni/MCM-41 catalyst, the presence of carbonyl intermediates, the co-existence of metallic and oxidized Ni species with sufficient molar ratio of Ni-0/Ni2+ under working conditions. H-2 and CO2 molecules are preferentially adsorbed and chemically activated over Ni-0 and Ni2+ species, respectively. The possible four-step reaction mechanism involved carbonyl pathway and the cleavage of C=O bond from CO2 as the rate-determining step over the engineered Ni/MCM-41 catalyst was demonstrated.
KeywordCH4 generation CO2 utilization active sites cooperative catalysis Ni-NiO components
DOI10.1002/cctc.201801896
Language英语
WOS Research AreaChemistry
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27325
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Bi, Qingyuan,Huang, Xieyi,Yin, Guoheng,et al. Cooperative Catalysis of Nickel and Nickel Oxide for Efficient Reduction of CO2 to CH4[J]. CHEMCATCHEM,2019,11(4):1295.
APA Bi, Qingyuan.,Huang, Xieyi.,Yin, Guoheng.,Chen, Tianyuan.,Du, Xianlong.,...&Huang, Fuqiang.(2019).Cooperative Catalysis of Nickel and Nickel Oxide for Efficient Reduction of CO2 to CH4.CHEMCATCHEM,11(4),1295.
MLA Bi, Qingyuan,et al."Cooperative Catalysis of Nickel and Nickel Oxide for Efficient Reduction of CO2 to CH4".CHEMCATCHEM 11.4(2019):1295.
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