Dissecting La2Ce2O7 catalyst to unravel the origin of the surface active sites devoting to its performance for oxidative coupling of methane (OCM)

2021 ◽  
Author(s):  
Zhixuan Zhang ◽  
Ying Gong ◽  
Junwei Xu ◽  
Yan Zhang ◽  
Qiyao Xiao ◽  
...  
Keyword(s):  
Oxidative Coupling ◽  
Active Sites ◽  
Oxidative Coupling Of Methane ◽  
Surface Active

Promoting the surface active sites of defect BaSnO3 perovskite with BaBr2 for the oxidative coupling of methane

2020 ◽  
Author(s):  
Junwei Xu ◽  
Rong Xi ◽  
Zhixuan Zhang ◽  
Yan Zhang ◽  
Xianglan Xu ◽  
...  
Keyword(s):  
Oxidative Coupling ◽  
Active Sites ◽  
Oxidative Coupling Of Methane ◽  
Surface Active

scholarly journals A Combined Computational and Experimental Study of Methane Activation during Oxidative Coupling of Methane (OCM) by Surface Metal Oxide Catalysts

2021 ◽  
Author(s):  
Daniyal Kiani ◽  
Sagar Sourav ◽  
Jonas Baltrusaitis ◽  
Israel E Wachs
Keyword(s):  
Experimental Study ◽  
Metal Oxide ◽  
Oxidative Coupling ◽  
Active Sites ◽  
Computational Models ◽  
Oxidative Coupling Of Methane ◽  
Catalytic Active Sites ◽  
Surface Metal ◽  
Heterolytic Dissociation ◽  
First Time

The experimentally validated computational models developed herein, for the first time, show that Mn-promotion does not enhance the activity of the surface Na2WO4 catalytic active sites for CH4 heterolytic dissociation...

Effect of Mg substitution on LaTi1−xMgxO3+δ catalysts for improving the C2 selectivity of the oxidative coupling of methane

2021 ◽  
Author(s):  
Larissa B. Lopes ◽  
Luiz H. Vieira ◽  
José M. Assaf ◽  
Elisabete M. Assaf
Keyword(s):  
Active Site ◽  
Oxidative Coupling ◽  
Oxidative Coupling Of Methane ◽  
Site Distribution ◽  
Surface Active ◽  
Mg Substitution

Mg substitution on B sites of La2Ti2O7 perovskites promoted changes in the surface active-site distribution leading to improvements in the C2 selectivity during the oxidative coupling of methane.

Nature of active sites in the oxidative coupling of methane to ethane over Li/MgO catalysts

1993 ◽  
Vol 11 (4) ◽  
pp. 2174-2178 ◽  
Author(s):  
Ming‐Cheng Wu ◽  
Charles M. Truong ◽  
Kent Coulter ◽  
D. Wayne Goodman
Keyword(s):  
Oxidative Coupling ◽  
Active Sites ◽  
Oxidative Coupling Of Methane

The nature, role and fate of surface active sites in Li/MgO oxidative coupling catalysts

1989 ◽  
Vol 4 (3-4) ◽  
pp. 301-310 ◽  
Author(s):  
C. Mirodatos ◽  
G.A. Martin ◽  
J.C. Bertolini ◽  
J. Saint-Just
Keyword(s):  
Oxidative Coupling ◽  
Active Sites ◽  
Surface Active

A study on active sites of A2BO4 catalysts with perovskite-like structures in oxidative coupling of methane

2021 ◽  
Vol 506 ◽  
pp. 111548
Author(s):  
Dahye Kwon ◽  
Inchan Yang ◽  
Suna An ◽  
JeongHyun Cho ◽  
Jeong-Myeong Ha ◽  
...  
Keyword(s):  
Oxidative Coupling ◽  
Active Sites ◽  
Oxidative Coupling Of Methane

Role of the Structure and Electronic Properties of Fe2O3-MoO3 Catalyst on the Dehydration of Isopropyl Alcohol

1993 ◽  
Vol 58 (7) ◽  
pp. 1591-1599 ◽  
Author(s):  
Abd El-Aziz A. Said
Keyword(s):  
Active Sites ◽  
Isopropyl Alcohol ◽  
Oxide Catalyst ◽  
Flow System ◽  
Charge Carriers ◽  
X Ray Diffraction ◽  
X Ray ◽  
Catalyst Composition ◽  
Surface Active

Molybdenum oxide catalyst doped or mixed with (1 - 50) mole % Fe3+ ions were prepared. The structure of the original samples and the samples calcined at 400 °C were characterized using DTA, X-ray diffraction and IR spectra. Measurements of the electrical conductivity of calcined samples with and without isopropyl alcohol revealed that the conductance increases on increasing the content of Fe3+ ions up to 50 mole %. The activation energies of charge carriers were determined in presence and absence of the alcohol. The catalytic dehydration of isopropyl alcohol was carried out at 250 °C using a flow system. The results obtained showed that the doped or mixed catalysts are active and selective towards propene formation. However, the catalyst containing 40 mole % Fe3+ ions exhibited the highest activity and selectivity. Correlations were attempted to the catalyst composition with their electronic and catalytic properties. Probable mechanism for the dehydration process is proposed in terms of surface active sites.

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