Single-atom molybdenum immobilized on photoactive carbon nitride as efficient photocatalysts for ambient nitrogen fixation in pure water

2019 ◽  
Vol 7 (34) ◽  
pp. 19831-19837 ◽  
Author(s):  
Xiang-Wei Guo ◽  
Shuang-Ming Chen ◽  
Hong-Juan Wang ◽  
Zhi-Ming Zhang ◽  
Hong Lin ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Active Site ◽  
Large Scale ◽  
Carbon Nitride ◽  
Pure Water ◽  
Single Atom ◽  
Ambient Conditions

A series of single-atom Mo-PCN photocatalysts were facilely and large-scale prepared. The two-coordinated Mo center can serve as active site for N2 chemisorption and activation, first achieving solar-driven N2 reduction in pure water under ambient conditions.

Finely tuning the phosphorus active site on g-C3N4 nanosheets for enhanced photocatalytic decontamination

2021 ◽  
Author(s):  
Lian-Lian Liu ◽  
Fei Chen ◽  
Jing-Hang Wu ◽  
Wen-Wei Li ◽  
Jie-Jie Chen ◽  
...  
Keyword(s):  
Visible Light ◽  
Active Site ◽  
Large Scale ◽  
Carbon Nitride ◽  
Low Cost ◽  
Graphitic Carbon Nitride ◽  
Scale Production ◽  
Practical Application ◽  
Environmental Friendliness ◽  
Large Scale Production

Graphitic carbon nitride (gCN) has attracted increasing interests in photocatalysis because of its visible-light-responsive ability, environmental friendliness, low cost and easiness of large-scale production. However, its practical application is restricted...

Defect Engineering Metal-Free Polymeric Carbon Nitride Electrocatalyst for Effective Nitrogen Fixation under Ambient Conditions

2018 ◽  
Vol 57 (32) ◽  
pp. 10246-10250 ◽  
Author(s):  
Chade Lv ◽  
Yumin Qian ◽  
Chunshuang Yan ◽  
Yu Ding ◽  
Yuanyue Liu ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Carbon Nitride ◽  
Ambient Conditions ◽  
Defect Engineering ◽  
Metal Free ◽  
Polymeric Carbon

scholarly journals Nitrogen fixation catalyzed by ferrocene-substituted dinitrogen-bridged dimolybdenum–dinitrogen complexes: unique behavior of ferrocene moiety as redox active site

2015 ◽  
Vol 6 (7) ◽  
pp. 3940-3951 ◽  
Author(s):  
Shogo Kuriyama ◽  
Kazuya Arashiba ◽  
Kazunari Nakajima ◽  
Hiromasa Tanaka ◽  
Kazunari Yoshizawa ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Active Site ◽  
Ambient Conditions ◽  
Redox Active ◽  
Dinitrogen Complexes

Mo–N2complex bearing ferrocenes as redox-active units efficiently catalyses the formation of ammonia from molecular dinitrogen under ambient conditions.

Visible light driven efficient metal free single atom catalyst supported on nanoporous carbon nitride for nitrogen fixation

2019 ◽  
Vol 21 (23) ◽  
pp. 12346-12352 ◽  
Author(s):  
Kalishankar Bhattacharyya ◽  
Ayan Datta
Keyword(s):  
Nitrogen Fixation ◽  
Visible Light ◽  
Carbon Nitride ◽  
Industrial Applications ◽  
Chemical Processes ◽  
Single Atom ◽  
Metal Free ◽  
Mild Conditions ◽  
Visible Light Driven ◽  
Production Of Ammonia

The production of ammonia (NH3), an important carbon-free chemical, through nitrogen (N2) fixation under mild conditions, is one of the most challenging and attractive chemical processes for industrial applications.

Large Scale-up Monocrystalized 3R MoS2 Electrocatalyst for Efficient Nitrogen Reduction Reaction

2021 ◽  
Author(s):  
Bin Fang ◽  
Junjie Yao ◽  
Xiaojun Zhang ◽  
Liang Ma ◽  
Yaqi Ye ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Large Scale ◽  
Scale Up ◽  
Reduction Reaction ◽  
Ambient Conditions ◽  
Environment Friendly ◽  
Nitrogen Reduction

Electrochemical nitrogen fixation supplies an environment-friendly strategy to produce ammonia (NH3) at ambient conditions. However, exploiting a kind of inexpensive and efficient electrocatalyst for electrocatalytic nitrogen reduction reaction (NRR) under...

Defect Engineering Metal-Free Polymeric Carbon Nitride Electrocatalyst for Effective Nitrogen Fixation under Ambient Conditions

2018 ◽  
Vol 130 (32) ◽  
pp. 10403-10407 ◽  
Author(s):  
Chade Lv ◽  
Yumin Qian ◽  
Chunshuang Yan ◽  
Yu Ding ◽  
Yuanyue Liu ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Carbon Nitride ◽  
Ambient Conditions ◽  
Defect Engineering ◽  
Metal Free ◽  
Polymeric Carbon

The Effect of Active Site-inhibited Factor VIIa on Tissue Factor-initiated Coagulation Using Platelets before and after Aspirin Administration

1997 ◽  
Vol 78 (04) ◽  
pp. 1202-1208 ◽  
Author(s):  
Marianne Kjalke ◽  
Julie A Oliver ◽  
Dougald M Monroe ◽  
Maureane Hoffman ◽  
Mirella Ezban ◽  
...  
Keyword(s):  
Tissue Factor ◽  
Active Site ◽  
Large Scale ◽  
Thrombin Generation ◽  
Factor Viia ◽  
Dependent Manner ◽  
Antithrombotic Agent ◽  
Before And After ◽  
Ic50 Values

SummaryActive site-inactivated factor VIIa has potential as an antithrombotic agent. The effects of D-Phe-L-Phe-L-Arg-chloromethyl ketone-treated factor VIla (FFR-FVIIa) were evaluated in a cell-based system mimicking in vivo initiation of coagulation. FFR-FVIIa inhibited platelet activation (as measured by expression of P-selectin) and subsequent large-scale thrombin generation in a dose-dependent manner with IC50 values of 1.4 ± 0.8 nM (n = 8) and 0.9 ± 0.7 nM (n = 7), respectively. Kd for factor VIIa binding to monocytes ki for FFR-FVIIa competing with factor VIIa were similar (11.4 ± 0.8 pM and 10.6 ± 1.1 pM, respectively), showing that FFR-FVIIa binds to tissue factor in the tenase complex with the same affinity as factor VIIa. Using platelets from volunteers before and after ingestion of aspirin (1.3 g), there were no significant differences in the IC50 values of FFR-FVIIa [after aspirin ingestion, the IC50 values were 1.7 ± 0.9 nM (n = 8) for P-selectin expression, p = 0.37, and 1.4 ± 1.3 nM (n = 7) for thrombin generation, p = 0.38]. This shows that aspirin treatment of platelets does not influence the inhibition of tissue factor-initiated coagulation by FFR-FVIIa, probably because thrombin activation of platelets is not entirely dependent upon expression of thromboxane A2.

Development of the ChIMES Force Field for Reactive Molecular Systems: Carbon Monoxide at Extreme Conditions

2019 ◽  
Author(s):  
Rebecca Lindsey ◽  
Nir Goldman ◽  
Laurence E. Fried ◽  
Sorin Bastea
Keyword(s):  
Carbon Monoxide ◽  
Molecular System ◽  
Interaction Model ◽  
System Size ◽  
Single Atom ◽  
Reactive System ◽  
Extreme Conditions ◽  
Ambient Conditions ◽  
Molecular Systems ◽  
Three Body

<p>The interatomic Chebyshev Interaction Model for Efficient Simulation (ChIMES) is based on linear combinations of Chebyshev polynomials describing explicit two- and three-body interactions. Recently, the ChIMES model has been developed and applied to a molten metallic system of a single atom type (carbon), as well as a non-reactive molecular system of two atom types at ambient conditions (water). Here, we continue application of ChIMES to increasingly complex problems through extension to a reactive system. Specifically, we develop a ChIMES model for carbon monoxide under extreme conditions, with built-in transferability to nearby state points. We demonstrate that the resulting model recovers much of the accuracy of DFT while exhibiting a 10<sup>4</sup>increase in efficiency, linear system size scalability and the ability to overcome the significant system size effects exhibited by DFT.</p>

scholarly journals Rapid synchronized fabrication of vascularized thermosets and composites

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Mayank Garg ◽  
Jia En Aw ◽  
Xiang Zhang ◽  
Polette J. Centellas ◽  
Leon M. Dean ◽  
...  
Keyword(s):  
Large Scale ◽  
Capillary Flow ◽  
External Heat ◽  
Frontal Polymerization ◽  
Self Healing ◽  
Vascular Networks ◽  
Ambient Conditions ◽  
External Energy ◽  
Imaging Phantoms ◽  
Vascular Structures

AbstractBioinspired vascular networks transport heat and mass in hydrogels, microfluidic devices, self-healing and self-cooling structures, filters, and flow batteries. Lengthy, multistep fabrication processes involving solvents, external heat, and vacuum hinder large-scale application of vascular networks in structural materials. Here, we report the rapid (seconds to minutes), scalable, and synchronized fabrication of vascular thermosets and fiber-reinforced composites under ambient conditions. The exothermic frontal polymerization (FP) of a liquid or gelled resin facilitates coordinated depolymerization of an embedded sacrificial template to create host structures with high-fidelity interconnected microchannels. The chemical energy released during matrix polymerization eliminates the need for a sustained external heat source and greatly reduces external energy consumption for processing. Programming the rate of depolymerization of the sacrificial thermoplastic to match the kinetics of FP has the potential to significantly expedite the fabrication of vascular structures with extended lifetimes, microreactors, and imaging phantoms for understanding capillary flow in biological systems.

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