Improved stability and activity of Fe-based catalysts through strong metal support interactions due to extrinsic oxygen vacancies in Ce0.8Sm0.2O2−δ for the efficient synthesis of ammonia

2020 ◽  
Vol 8 (32) ◽  
pp. 16676-16689 ◽  
Author(s):  
John Humphreys ◽  
Rong Lan ◽  
Shigang Chen ◽  
Shanwen Tao
Keyword(s):  
Catalytic Activity ◽  
Oxygen Vacancies ◽  
Ammonia Synthesis ◽  
Efficient Synthesis ◽  
Anion Vacancies ◽  
Metal Support ◽  
Improved Stability ◽  
Synthesis Catalysts ◽  
Metal Support Interactions

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.

Electronic metal–support interactions enhance the ammonia synthesis activity over ruthenium supported on Zr-modified CeO2 catalysts

RSC Advances ◽  
2016 ◽  
Vol 6 (56) ◽  
pp. 51106-51110 ◽  
Author(s):  
Zhanwei Ma ◽  
Xumao Xiong ◽  
Chengli Song ◽  
Bin Hu ◽  
Weiqiang Zhang
Keyword(s):  
Catalytic Activity ◽  
Electronic Properties ◽  
Ammonia Synthesis ◽  
Band Center ◽  
Support Interaction ◽  
Ru Nanoparticles ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Synthesis Activity ◽  
Metal Support Interactions

Doping Zr4+ alters the electronic properties of the support. The electronic metal–support interaction produces the upshift of d-band center of Ru nanoparticles, which further influences the catalytic activity of ammonia synthesis.

Effects of rare earth metal doping on Au/ReZrO2 catalysts for efficient hydrogen generation from formic acid

2021 ◽  
Vol 45 (12) ◽  
pp. 5704-5711
Author(s):  
Luming Wu ◽  
Yu Hao ◽  
Shaohua Chen ◽  
Rui Chen ◽  
Pingchuan Sun ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rare Earth ◽  
Rare Earth Metal ◽  
Oxygen Vacancies ◽  
Hydrogen Generation ◽  
Earth Metal ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Metal Doped

Rare earth metal doped ZrO2 can promote the formation of oxygen vacancies in zirconia, which enhances the metal–support interaction, finally promoting catalytic activity of FA dehydrogenation.

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

2017 ◽  
Vol 7 (19) ◽  
pp. 4250-4258 ◽  
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.

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

Catalysts ◽  
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.

Engineering surface defects and metal–support interactions on Pt/TiO2(B) nanobelts to boost the catalytic oxidation of CO

2018 ◽  
Vol 8 (19) ◽  
pp. 4934-4944 ◽  
Author(s):  
Jinghua Liu ◽  
Tong Ding ◽  
Hao Zhang ◽  
Guangcheng Li ◽  
Jinmeng Cai ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
Water Resistance ◽  
Surface Defects ◽  
High Catalytic Activity ◽  
Oxidation Of Co ◽  
Catalytic Oxidation Of Co ◽  
Metal Support ◽  
Metal Support Interactions

The thermally reduced Pt/TiO2(B) catalysts show high catalytic activity and good water resistance for the catalytic oxidation of CO.

scholarly journals Studies of CO2 hydrogenation over cobalt/ceria catalysts with in situ characterization: the effect of cobalt loading and metal–support interactions on the catalytic activity

2020 ◽  
Vol 10 (19) ◽  
pp. 6468-6482 ◽  
Author(s):  
Kaixi Deng ◽  
Lili Lin ◽  
Ning Rui ◽  
Dimitriy Vovchok ◽  
Feng Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Oxide ◽  
Catalytic Properties ◽  
Co2 Hydrogenation ◽  
In Situ Characterization ◽  
Control Activity ◽  
Metal Support ◽  
Metal Support Interactions ◽  
Ceria Catalysts

Metal–oxide interactions affect the catalytic properties of Co/CeO2 and can be used to control activity and selectivity.

Strong metal–support interactions of Co-based catalysts facilitated by dopamine for highly efficient ammonia synthesis: in situ XPS and XAFS spectroscopy coupled with TPD studies

2019 ◽  
Vol 55 (4) ◽  
pp. 474-477 ◽  
Author(s):  
Xiuyun Wang ◽  
Lingling Li ◽  
Tianhua Zhang ◽  
Bingyu Lin ◽  
Jun Ni ◽  
...  
Keyword(s):  
Ammonia Synthesis ◽  
Xafs Spectroscopy ◽  
Support Interaction ◽  
In Situ Xps ◽  
Metal Support Interaction ◽  
New Strategy ◽  
Metal Support ◽  
Metal Support Interactions ◽  
Co Nanoparticles

We report a new strategy for strengthening metal–support interaction and stabilizing Co nanoparticles at high temperature.

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