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.

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.

Improving the ammonia synthesis activity of Ru/CeO2 through enhancement of the metal–support interaction

2021 ◽  
Vol 60 ◽  
pp. 403-409
Author(s):  
Chunyan Li ◽  
Yuying Shi ◽  
Zecheng Zhang ◽  
Jun Ni ◽  
Xiuyun Wang ◽  
...  
Keyword(s):  
Ammonia Synthesis ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Synthesis Activity

Metal–support interaction-modulated catalytic activity of Ru nanoparticles on Sm2O3 for efficient ammonia decomposition

2021 ◽  
Vol 11 (8) ◽  
pp. 2915-2923
Author(s):  
Xilun Zhang ◽  
Lin Liu ◽  
Ji Feng ◽  
Xiaohua Ju ◽  
Jiemin Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ammonia Decomposition ◽  
Support Interaction ◽  
Ru Nanoparticles ◽  
Metal Support Interaction ◽  
Metal Support

The activity of Ru/Sm2O3 catalyst for ammonia decomposition can be greatly improved by modulating the metal–support interaction of the catalyst.

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.

Trimetallic RuxMoNi Catalysts Supported on SBA-15 for the Hydrodesulfurization of Dibenzothiophene

2018 ◽  
Vol 17 (5) ◽  
Author(s):  
N.L. Torres-García ◽  
R. Huirache-Acuña ◽  
T.A. Zepeda-Partida ◽  
B. Pawelec ◽  
J.L.G. Fierro ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Catalytic Activity ◽  
Chelating Agent ◽  
Active Phase ◽  
Atomic Ratio ◽  
Support Interaction ◽  
Micro Raman Spectroscopy ◽  
Metal Support Interaction ◽  
Sulfided Catalysts ◽  
Metal Support

Abstract In this work, novel trimetallic catalysts based on transition metal sulphides (Ru, Mo and Ni) supported on SBA-15 were synthesized. Citric acid (CA) was used as chelating agent in order to enhance the dispersion of the active phase and minimize the metal-support interaction. Sulfided catalysts were evaluated in the reaction of hydrodesulfurization (HDS) of dibenzothiophene (DBT) at 320 °C and 54.5 atm of total H2 pressure. The effects of different Ru/(Ni + Mo) atomic ratios on the active phase were studied. The catalysts were characterized using Micro-Raman spectroscopy, DRIFTS, XRD, XPS, HR-TEM and SEM techniques. Results have shown that there was a better dispersion of the metallic phases, which improves the physicochemical properties of the catalysts, increasing the catalytic activity. The trimetallic RuxMoNi catalyst with the lowest atomic ratio, have shown superior catalytic activity compared to their higher atomic ratio counterparts. The interaction of the chelating agent improved the catalytic activity, which was superior to that observed for NiMo based catalysts, considered one of the most active hydrotreating catalysts.

Pt NPs immobilized on a N-doped graphene@Al2O3 hybrid support as robust catalysts for low temperature CO oxidation

2018 ◽  
Vol 54 (79) ◽  
pp. 11168-11171 ◽  
Author(s):  
Zhimin Jia ◽  
Fei Huang ◽  
Jiangyong Diao ◽  
Jiayun Zhang ◽  
Jia Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Co Oxidation ◽  
Platinum Nanoparticles ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Low Temperature Co Oxidation ◽  
Doped Graphene ◽  
Strong Metal Support Interaction

Platinum nanoparticles (Pt NPs) immobilized on a N-doped graphene@Al2O3 hybrid support (Al2O3@CNx) were synthesized and exhibit superior catalytic activity for low temperature CO oxidation, due to a strong metal–support interaction between Pt NPs and the N-doped.

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.

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