Ru nanoparticles stabilized by ionic liquids supported onto silica: highly active catalysts for low-temperature CO2 methanation

2018 ◽  
Vol 20 (21) ◽  
pp. 4932-4945 ◽  
Author(s):  
Xinpeng Guo ◽  
Zhijian Peng ◽  
Atsadang Traitangwong ◽  
Gang Wang ◽  
Haiyang Xu ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Low Temperature ◽  
Co2 Methanation ◽  
Schematic Representation ◽  
Ru Nanoparticles ◽  
Highly Active

Schematic representation of CO2 methanation by Ru/IL/SiO2 catalysts.

Encapsulation of Ru nanoparticles: Modifying the reactivity toward CO and CO2 methanation on highly active Ru/TiO2 catalysts

2020 ◽  
Vol 270 ◽  
pp. 118846
Author(s):  
Ali M. Abdel-Mageed ◽  
Klara Wiese ◽  
Magdalena Parlinska-Wojtan ◽  
Jabor Rabeah ◽  
Angelika Brückner ◽  
...  
Keyword(s):  
Co2 Methanation ◽  
Ru Nanoparticles ◽  
Highly Active ◽  
Co And Co2 Methanation

Highly Active Ce- and Mg-Promoted Ni Catalysts Supported on Cellulose-Derived Carbon for Low-Temperature CO2 Methanation

2021 ◽  
Author(s):  
Pilar Tarifa ◽  
Cristina Megías-Sayago ◽  
Fernando Cazaña ◽  
Miguel González-Martín ◽  
Nieves Latorre ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ni Catalysts ◽  
Co2 Methanation ◽  
Highly Active

Highly Active Ni-Based Catalyst Derived from Double Hydroxides Precursor for Low Temperature CO2 Methanation

2018 ◽  
Vol 57 (28) ◽  
pp. 9102-9111 ◽  
Author(s):  
Xinpeng Guo ◽  
Zhijian Peng ◽  
Mingxiang Hu ◽  
Cuncun Zuo ◽  
Atsadang Traitangwong ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co2 Methanation ◽  
Highly Active ◽  
Double Hydroxides

Sputtering-deposition of Ru nanoparticles onto Al2O3 modified with imidazolium ionic liquids: synthesis, characterisation and catalysis

2015 ◽  
Vol 44 (6) ◽  
pp. 2827-2834 ◽  
Author(s):  
Lucas Foppa ◽  
Leandro Luza ◽  
Aitor Gual ◽  
Daniel E. Weibel ◽  
Dario Eberhardt ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ruthenium Nanoparticles ◽  
Bulk Metal ◽  
Sputtering Deposition ◽  
Modified Alumina ◽  
Imidazolium Ionic Liquids ◽  
Ru Nanoparticles ◽  
Highly Active

Ruthenium nanoparticles obtained by sputtering deposition from the bulk metal onto an ionic-liquid modified alumina are highly active catalysts for the hydrogenation of benzene.

Pt-Pd Nanoalloy for the Unprecedented Activation of Carbon-Fluorine Bond at Low Temperature

2019 ◽  
Author(s):  
Raghu Nath Dhital ◽  
keigo nomura ◽  
Yoshinori Sato ◽  
Setsiri Haesuwannakij ◽  
Masahiro Ehara ◽  
...  
Keyword(s):  
Activation Energy ◽  
Low Temperature ◽  
Dft Calculations ◽  
Bond Activation ◽  
Mild Conditions ◽  
Selective Transformation ◽  
Rate Determining Step ◽  
Highly Active ◽  
Harsh Conditions ◽  
Reaction Profile

Carbon-Fluorine (C-F) bonds are considered the most inert organic functionality and their selective transformation under mild conditions remains challenging. Herein, we report a highly active Pt-Pd nanoalloy as a robust catalyst for the transformation of C-F bonds into C-H bonds at low temperature, a reaction that often required harsh conditions. The alloying of Pt with Pd is crucial to activate C-F bond. The reaction profile kinetics revealed that the major source of hydrogen in the defluorinated product is the alcoholic proton of 2-propanol, and the rate-determining step is the reduction of the metal upon transfer of the <i>beta</i>-H from 2-propanol. DFT calculations elucidated that the key step is the selective oxidative addition of the O-H bond of 2-propanol to a Pd center prior to C-F bond activation at a Pt site, which crucially reduces the activation energy of the C-F bond. Therefore, both Pt and Pd work independently but synergistically to promote the overall reaction

Electron Donation by Low-Crystalline Ba-La-Ce Oxygen-Deficient Composite Oxide Accumulating on Ru Nanoparticles for Ammonia Synthesis under Mild Conditions

2019 ◽  
Author(s):  
Katsutoshi Sato ◽  
Shin-ichiro Miyahara ◽  
Yuta Ogura ◽  
Kotoko Tsujimaru ◽  
Yuichiro Wada ◽  
...  
Keyword(s):  
Ammonia Synthesis ◽  
Bond Cleavage ◽  
Synthesis Process ◽  
Strong Electron ◽  
Mild Conditions ◽  
Ru Nanoparticles ◽  
Rate Determining Step ◽  
Highly Active ◽  
Composite Oxides ◽  
Low Crystalline

<p>To mitigate global problems related to energy and global warming, it is helpful to develop an ammonia synthesis process using catalysts that are highly active under mild conditions. Here we show that the ammonia synthesis activity of Ru/Ba/LaCeO<i><sub>x</sub></i> pre-reduced at 700 °C is the highest reported among oxide-supported Ru catalysts. Our results indicate that low crystalline oxygen-deficient composite oxides, which include Ba<sup>2+</sup>, Ce<sup>3+</sup> and La<sup>3+</sup>, with strong electron-donating ability, accumulate on Ru particles and thus promote N≡N bond cleavage, which is the rate determining step for ammonia synthesis.</p>

Electron Donation by Low-Crystalline Ba-La-Ce Oxygen-Deficient Composite Oxide Accumulating on Ru Nanoparticles for Ammonia Synthesis under Mild Conditions

2019 ◽  
Author(s):  
Katsutoshi Sato ◽  
Shin-ichiro Miyahara ◽  
Yuta Ogura ◽  
Kotoko Tsujimaru ◽  
Yuichiro Wada ◽  
...  
Keyword(s):  
Ammonia Synthesis ◽  
Bond Cleavage ◽  
Synthesis Process ◽  
Strong Electron ◽  
Mild Conditions ◽  
Ru Nanoparticles ◽  
Rate Determining Step ◽  
Highly Active ◽  
Composite Oxides ◽  
Low Crystalline

<p>To mitigate global problems related to energy and global warming, it is helpful to develop an ammonia synthesis process using catalysts that are highly active under mild conditions. Here we show that the ammonia synthesis activity of Ru/Ba/LaCeO<i><sub>x</sub></i> pre-reduced at 700 °C is the highest reported among oxide-supported Ru catalysts. Our results indicate that low crystalline oxygen-deficient composite oxides, which include Ba<sup>2+</sup>, Ce<sup>3+</sup> and La<sup>3+</sup>, with strong electron-donating ability, accumulate on Ru particles and thus promote N≡N bond cleavage, which is the rate determining step for ammonia synthesis.</p>

scholarly journals Improvement of Ni/Al2O3 Catalysts for Low-Temperature CO2 Methanation by Vanadium and Calcium Oxide Addition

2021 ◽  
Author(s):  
Gabriella Garbarino ◽  
Paweł Kowalik ◽  
Paola Riani ◽  
Katarzyna Antoniak-Jurak ◽  
Piotr Pieta ◽  
...  
Keyword(s):  
Low Temperature ◽  
Calcium Oxide ◽  
Co2 Methanation ◽  
Oxide Addition

Highly dispersed and ultra-small Ru nanoparticles deposited on silica support as highly active and stable catalyst for biphenyl hydrogenation

2021 ◽  
Vol 508 ◽  
pp. 111577
Author(s):  
Wenwei Su ◽  
Jingyi Yang ◽  
Meng Zhang ◽  
Zhipeng Zhao ◽  
Jingli Han ◽  
...  
Keyword(s):  
Silica Support ◽  
Ru Nanoparticles ◽  
Highly Active ◽  
Stable Catalyst ◽  
Highly Dispersed
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