Size-dependent strong metal-support interaction in Pd/ZnO catalysts for hydrogenation of CO2 to methanol

2021 ◽  
Author(s):  
Liangcai Zhang ◽  
Xinyu Liu ◽  
Hengwei Wang ◽  
Lina Cao ◽  
Chenxi Huang ◽  
...  
Keyword(s):  
Catalytic Reactions ◽  
Hydrogenation Of Co2 ◽  
Size Dependent ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
The Stability ◽  
Smsi Effect ◽  
Strong Metal Support Interaction

Strong metal-support interaction (SMSI) has long been studied in catalytic reactions. Proper utilization of the SMSI effect might not only improve the stability of the catalysts, but also the activity...

Understanding the Strong Metal–Support Interaction (SMSI) Effect in CuxNi1–x/CeO2 (0 < x < 1) Nanoparticles for Enhanced Catalysis

2019 ◽  
Vol 2 (4) ◽  
pp. 2559-2573 ◽  
Author(s):  
Wallace T. Figueiredo ◽  
Guilherme B. Della Mea ◽  
Maximiliano Segala ◽  
Daniel L. Baptista ◽  
Carlos Escudero ◽  
...  
Keyword(s):  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Smsi Effect ◽  
Strong Metal Support Interaction

Fischer-Tropsch synthesis: Variation of Co/ ${{\gamma}}$ γ -Al2O3 catalyst performance due to changing dispersion, reducibility, acidity and strong metal-support interaction by Ru, Zr and Ce promoters

2017 ◽  
Vol 16 (2) ◽  
Author(s):  
Moradian Amin ◽  
Bahadoran Farzad ◽  
Shirazi Laleh ◽  
Zamani Yahya
Keyword(s):  
Catalyst Activity ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Reduction Behavior ◽  
Fischer Tropsch Synthesis ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Smsi Effect ◽  
Strong Metal Support Interaction

AbstractIn this study the effect of (0.1 %Ru, 0–10 % Zr) and (0.1 %Ru, 0–10 % Ce) promoters on dispersion, strong metal-support interaction and reduction behavior of cobalt-supported alumina catalyst in the Fischer-Tropsch synthesis was investigated. The synthesized catalysts were characterized by BET, XRD, ICP, TPR, XPS, and TEM techniques. The results show that addition of Ce to the catalyst leads to the shift of the TPR peaks to lower temperatures which expected that shows higher activity due to higher reducibility, but surprisingly due to SMSI effect results in the lower catalyst activity compared with the unpromoted catalyst. Also, there was a synergistic effect between Ce and Ru in the reduction behavior of Ru-Ce promoted catalyst. The other notable finding of this study was the improvement in the catalyst reducibility in the presence of Zr compared with the unpromoted one that equivalently means the higher catalyst activity. Comparison of the Zr-promoted with the Ce-promoted catalysts show that the former have higher catalyst activity than the latter due to higher acidity and SMSI effect in the presence of the Zr promoter. The C5selectivity of the 0.1Ru10Zr/15Co and 3Ce/15Co catalysts at low pressure have shown more than 50 % improvement compared to the unpromoted one. Based on the activity at atmospheric pressure; the unpromoted, 0.1Ru/15Co, 0.1Ru3Ce/15Co and 0.1Ru10Zr/15Co catalysts were selected for high pressure condition tests, in which the 0.1Ru10Zr/15Co catalyst shows the highest catalyst activity and heavier hydrocarbon selectivity.

scholarly journals Size-dependent strong metal-support interaction in TiO2 supported Au nanocatalysts

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Xiaorui Du ◽  
Yike Huang ◽  
Xiaoli Pan ◽  
Bing Han ◽  
Yang Su ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Hydrogenation Reaction ◽  
Au Nps ◽  
Size Dependent ◽  
Support Interaction ◽  
Alternative Approach ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Thermodynamic Equilibrium Model ◽  
Strong Metal Support Interaction

AbstractThe strong metal-support interaction (SMSI) has long been studied in heterogonous catalysis on account of its importance in stabilizing active metals and tuning catalytic performance. As a dynamic process taking place at the metal-support interface, the SMSI is closely related to the metal surface properties which are usually affected by the size of metal nanoparticles (NPs). In this work we report the discovery of a size effect on classical SMSI in Au/TiO2 catalyst where larger Au particles are more prone to be encapsulated than smaller ones. A thermodynamic equilibrium model was established to describe this phenomenon. According to this finding, the catalytic performance of Au/TiO2 catalyst with uneven size distribution can be improved by selectively encapsulating the large Au NPs in a hydrogenation reaction. This work not only brings in-depth understanding of the SMSI phenomenon and its formation mechanism, but also provides an alternative approach to refine catalyst performance.

scholarly journals Substoichiometric ultrathin zirconia films cause strong metal–support interaction

2019 ◽  
Vol 7 (43) ◽  
pp. 24837-24846 ◽  
Author(s):  
Peter Lackner ◽  
Joong Il Jake Choi ◽  
Ulrike Diebold ◽  
Michael Schmid
Keyword(s):  
Charge State ◽  
Inverse Model ◽  
Model Catalysts ◽  
Support Interaction ◽  
Reducing Conditions ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Smsi Effect ◽  
Zirconia Films ◽  
Strong Metal Support Interaction

ZrO2/metal inverse model catalysts exhibit the strong metal–support interaction (SMSI) effect. Upon annealing under reducing conditions, an oxygen-deficient, ultrathin ZrO≈1.5 film covers the metal. Nevertheless, Zr retains its 4+ charge state.

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