Effect of Strong Metal Support Interactions of Supported Ni and Ni-Co Catalyst on Metal Dispersion and Catalytic Activity toward Dry Methane Reforming Reaction

The SMSI between Fe and oxygen vacancies in Ce0.8Sm0.2O2−δ helps to weaken and break the strong NN bonds in N2, increasing the catalytic activity. Materials with anion vacancies improve oxygenate tolerance property of ammonia synthesis catalysts.

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Fabrication, characterization, and stability of supported single-atom catalysts

Catalysis Science & Technology ◽

10.1039/c7cy00723j ◽

2017 ◽

Vol 7 (19) ◽

pp. 4250-4258 ◽

Cited By ~ 53

Author(s):

Yaxin Chen ◽

Zhiwei Huang ◽

Zhen Ma ◽

Jianmin Chen ◽

Xingfu Tang

Keyword(s):

Catalytic Activity ◽

Single Atom ◽

Metal Support ◽

Metal Support Interactions

Strong metal–support interactions are key requirements for development of stable single-atom catalysts with pronounced catalytic activity.

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Effect of Bimetallic Doping in Cobalt Titanate for Methane Reforming

10.26434/chemrxiv.8233967.v1 ◽

2019 ◽

Author(s):

Disha Jain

Keyword(s):

Catalytic Activity ◽

Low Cost ◽

Coke Deposition ◽

Ex Situ ◽

Pt Catalyst ◽

High Catalytic Activity ◽

Methane Reforming ◽

Metal Support Interaction ◽

Metal Support ◽

Surface Intermediates

Supported Ni catalysts are extensively studied for methane reforming due to their high catalytic activity and low cost. However, these catalysts undergo deactivation due to coke deposition and oxidation of Ni particles. In the present work, Ni and Pt substituted CoTiO3 were synthesized and studied for steam (SRM) and dry (DRM) reforming of methane. The catalytic activity of monometallic and bimetallic Ni-Pt catalyst was compared for SRM and reducibility studies were done to highlight the change in metal-support interaction in the synthesized samples. Ex situ and in situ characterization were performed to understand the change in catalyst surface and the nature of surface intermediates formed during the reaction. Consequently, surface reaction mechanism was proposed and kinetic parameters were determined by fitting experimental data.

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Effect of Bimetallic Doping in Cobalt Titanate for Methane Reforming

10.26434/chemrxiv.8233967 ◽

2019 ◽

Author(s):

Disha Jain

Keyword(s):

Catalytic Activity ◽

Low Cost ◽

Coke Deposition ◽

Ex Situ ◽

Pt Catalyst ◽

High Catalytic Activity ◽

Methane Reforming ◽

Metal Support Interaction ◽

Metal Support ◽

Surface Intermediates

Supported Ni catalysts are extensively studied for methane reforming due to their high catalytic activity and low cost. However, these catalysts undergo deactivation due to coke deposition and oxidation of Ni particles. In the present work, Ni and Pt substituted CoTiO3 were synthesized and studied for steam (SRM) and dry (DRM) reforming of methane. The catalytic activity of monometallic and bimetallic Ni-Pt catalyst was compared for SRM and reducibility studies were done to highlight the change in metal-support interaction in the synthesized samples. Ex situ and in situ characterization were performed to understand the change in catalyst surface and the nature of surface intermediates formed during the reaction. Consequently, surface reaction mechanism was proposed and kinetic parameters were determined by fitting experimental data.

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High Catalytic Activity of Pt/Al2O3 Catalyst in CO Oxidation at Room Temperature—A New Insight into Strong Metal–Support Interactions

Catalysts ◽

10.3390/catal11121475 ◽

2021 ◽

Vol 11 (12) ◽

pp. 1475

Author(s):

Ireneusz Kocemba ◽

Izabela Śmiechowicz ◽

Marcin Jędrzejczyk ◽

Jacek Rogowski ◽

Jacek Michał Rynkowski

Keyword(s):

Catalytic Activity ◽

Co Oxidation ◽

Room Temperature ◽

Oxygen Adsorption ◽

High Catalytic Activity ◽

Adsorption Sites ◽

Co Oxidation Reaction ◽

Metal Support ◽

Metal Support Interactions ◽

Al2o3 Catalyst

The concept of very strong metal–support interactions (VSMSI) was defined in regard to the interactions that influence the catalytic properties of catalysts due to the creation of a new phase as a result of a solid-state chemical reaction between the metal and support. In this context, the high catalytic activity of the 1%Pt/Al2O3 catalyst in the CO oxidation reaction at room temperature was explained. The catalyst samples were reduced at different temperatures ranging from 500 °C to 800 °C and characterized using TPR, O2/H2 titration, CO chemisorption, TPD-CO, FTIR-CO, XRD, and TOF-SIMS methods. Based on the obtained results, it was claimed that with very high temperature reduction (800 °C), nonstoichiometric platinum species [Pt(Cl)Ox] strongly anchored to Al2O3 surface are formed. These species act as the oxygen adsorption sites.

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