New opportunities for efficient N2 fixation by nanosheet photocatalysts

Nanoscale ◽  
2018 ◽  
Vol 10 (33) ◽  
pp. 15429-15435 ◽  
Author(s):  
Hao Li ◽  
Chengliang Mao ◽  
Huan Shang ◽  
Zhiping Yang ◽  
Zhihui Ai ◽  
...  
Keyword(s):  
N2 Fixation ◽  
Ammonia Synthesis ◽  
Chemical Processes ◽  
Holy Grail ◽  
Mild Conditions ◽  
Important Chemical ◽  
Catalytic Ammonia Synthesis

Catalytic ammonia synthesis from dinitrogen (N2) under mild conditions has been considered to be the “holy grail” of N2 fixation, which is one of the most important chemical processes in the agriculture, biological and industrial fields.

Applications of rare earth oxides in catalytic ammonia synthesis and decomposition

2021 ◽  
Author(s):  
Ji Feng ◽  
Xilun Zhang ◽  
Jiemin Wang ◽  
Xiaohua Ju ◽  
Lin Liu ◽  
...  
Keyword(s):  
Rare Earth ◽  
Hydrogen Storage ◽  
Ammonia Synthesis ◽  
High Capacity ◽  
Rare Earth Oxides ◽  
Energy Carrier ◽  
Mild Conditions ◽  
Catalytic Ammonia Synthesis

Ammonia gains increasing attention as a promising energy carrier because of its high capacity for hydrogen storage (17.6 wt.%), facile liquefaction under mild conditions and easy libration of H2. Catalytic...

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 Microwave-enhanced catalytic ammonia synthesis under moderate pressure and temperature

2021 ◽  
pp. 106344
Author(s):  
Yuxin Wang ◽  
Tuhin S. Khan ◽  
Christina Wildfire ◽  
Dushyant Shekhawat ◽  
Jianli Hu
Keyword(s):  
Ammonia Synthesis ◽  
Moderate Pressure ◽  
Catalytic Ammonia Synthesis

Mechanochemistry for ammonia synthesis under mild conditions

2020 ◽  
Author(s):  
Gao-Feng Han ◽  
Feng Li ◽  
Zhi-Wen Chen ◽  
Claude Coppex ◽  
Seok-Jin Kim ◽  
...  
Keyword(s):  
Ammonia Synthesis ◽  
Mild Conditions

Photocatalysis

2021 ◽  
Author(s):  
Amit Kumar
Keyword(s):  
Hydrogen Production ◽  
Environmental Pollution ◽  
Endocrine Disruptors ◽  
N2 Fixation ◽  
Ammonia Synthesis ◽  
Clean Energy ◽  
Reaction Engineering ◽  
Co2 Conversion ◽  
New Materials ◽  
Ion Exchangers

Photocatalysis is important in fighting environmental pollution, such as pharmaceutical effluents, dyes, pesticides and endocrine disruptors. It is also used for the production of clean energy, e.g. by way of hydrogen production from watersplitting, or CO2 conversion into fuels. Further, photocatalytic N2 fixation is promising for achieving sustainable ammonia synthesis. The book discusses new materials and reaction engineering techniques, such as heterojunction formations, composites, ion exchangers, photocatalytic membranes, etc.

Unraveling the Size-Dependent Effect of Ru-based Catalysts on Ammonia Synthesis at Mild Conditions

2021 ◽  
Author(s):  
Yanliang Zhou ◽  
Junjie Wang ◽  
Lili Liang ◽  
Qianjin Sai ◽  
Jun Ni ◽  
...  
Keyword(s):  
Ammonia Synthesis ◽  
Dependent Effect ◽  
Size Dependent ◽  
Mild Conditions

Crease Recovery of Untreated and Resin-Treated Cotton Fabrics

1976 ◽  
Vol 46 (5) ◽  
pp. 356-360 ◽  
Author(s):  
H. U. Mehta ◽  
K. C. Gupta ◽  
V. R. Bhatt
Keyword(s):  
Tensile Strength ◽  
Abrasion Resistance ◽  
Cotton Fabrics ◽  
Chemical Processes ◽  
Tear Strength ◽  
Mild Conditions ◽  
Cotton Textiles ◽  
Recovery Angle ◽  
Resin Treatment

Cotton textiles received from loomshed undergo various chemical processes before finishing. These processes play an important role in determining the end properties of the unfinished fabric. The effect of processing on tensile strength and fluidity is well known. However, progressive changes in crease recovery, tear strength, and abrasion resistance have not been investigated systematically. Fabric with identical constructions but processed under different conditions often differ considerably prior to resin finishing. In this paper causes for differences in initial crease recovery are discussed. It has been observed that any residual wax present on the fabric after scouring affects the initial crease recovery significantly. Scouring under mild conditions helps to retain a high initial crease recovery. In comparison with thoroughly scoured fabrics, mildly scoured fabrics require less resin to obtain a given crease-recovery angle. The resultant losses in strength after resin treatment are also less.

scholarly journals The role of heterogeneous catalysts in the plasma-catalytic ammonia synthesis

2021 ◽  
Vol 362 ◽  
pp. 2-10 ◽  
Author(s):  
Bhaskar S. Patil ◽  
Nikolay Cherkasov ◽  
Nadadur Veeraraghavan Srinath ◽  
Juergen Lang ◽  
Alex O. Ibhadon ◽  
...  
Keyword(s):  
Heterogeneous Catalysts ◽  
Ammonia Synthesis ◽  
Catalytic Ammonia Synthesis
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