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

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>

ChemInform Abstract: Icosahedral Gold-Platinum Alloy Nanocrystals in Hollow Silica: A Highly Active and Stable Catalyst for Ullmann Reactions.

ChemInform ◽  
2014 ◽  
Vol 45 (18) ◽  
pp. no-no
Author(s):  
Xiaoli Wu ◽  
Longfei Tan ◽  
Dong Chen ◽  
Xianwei Meng ◽  
Fangqiong Tang
Keyword(s):  
Hollow Silica ◽  
Platinum Alloy ◽  
Alloy Nanocrystals ◽  
Highly Active ◽  
Stable Catalyst ◽  
Gold Platinum

A Simple Method for Preparing the Highly Dispersed Supported Co3O4on Silica Support

2011 ◽  
Vol 50 (7) ◽  
pp. 4212-4215 ◽  
Author(s):  
Jianfeng Chen ◽  
Yurui Zhang ◽  
Li Tan ◽  
Yi Zhang
Keyword(s):  
Silica Support ◽  
Simple Method ◽  
Highly Dispersed
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