Unveiling the Genesis of the High Catalytic Activity in Nickel Phthalocyanine for Electrochemical Ammonia Synthesis

2021 ◽  
Author(s):  
Shyamal Murmu ◽  
Sourav Paul ◽  
Samadhan Kapse ◽  
Ranjit Thapa ◽  
Santanu Chattopadhyay ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Active Sites ◽  
Ammonia Synthesis ◽  
Reduction Reaction ◽  
High Catalytic Activity ◽  
Nitrogen Reduction ◽  
Nickel Phthalocyanine ◽  
Bosch Process

Electrochemical ammonia synthesis by nitrogen reduction reaction (NRR) using economically efficient electrocatalyst can provide a substitute of Haber-Bosch process. However, identification of active sites responsible for the origination of catalytic...

Single-atom transition metals supported on black phosphorene for electrochemical nitrogen reduction

Nanoscale ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 4903-4908 ◽  
Author(s):  
Kang Liu ◽  
Junwei Fu ◽  
Li Zhu ◽  
Xiaodong Zhang ◽  
Hongmei Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Transition Metals ◽  
Reduction Reaction ◽  
Single Atom ◽  
High Catalytic Activity ◽  
Nitrogen Reduction ◽  
Mild Conditions ◽  
Black Phosphorene

Electrochemical nitrogen reduction reaction (NRR) is a promising route to produce ammonia under mild conditions. Single-atom W supported on BP was screened as a promising electrocatalyst with high catalytic activity, stability, and selectively for NRR.

Boosting Electrochemical Nitrogen Reduction to Ammonia with High Efficiency using LiNb3O8 Electrocatalyst in Neutral Media

2022 ◽  
Author(s):  
Qi Wang ◽  
Shuhui Fan ◽  
Leran Liu ◽  
Xiaojiang Wen ◽  
Yun Wu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Ammonia Synthesis ◽  
Reduction Reaction ◽  
Nitrogen Reduction ◽  
Bosch Process ◽  
Neutral Media

Nitrogen reduction reaction (NRR) has great research prospects as a method to replace the industrial Haber-Bosch process for ammonia synthesis. Nevertheless, the efficiency of NRR is mainly depended on the...

On the mechanism of electrochemical ammonia synthesis on the Ru catalyst

2016 ◽  
Vol 18 (13) ◽  
pp. 9161-9166 ◽  
Author(s):  
Seoin Back ◽  
Yousung Jung
Keyword(s):  
Active Sites ◽  
Hydrogen Adsorption ◽  
Ammonia Synthesis ◽  
Reduction Reaction ◽  
Nitrogen Reduction ◽  
Associative Mechanism ◽  
Ru Catalyst

The nitrogen reduction reaction (NRR) pathways involving various N–N dissociation steps are found to be comparable to the conventional associative mechanism. The competitive hydrogen adsorption and evolution is revealed to negatively affect the NRR for two reasons, an increase in NRR overpotentials as a function of partial H-coverages as well as a decreased number of active sites.

Defect induced nitrogen reduction reaction of carbon nanomaterials

2021 ◽  
Author(s):  
Reen Maria Lawrence ◽  
Sreekuttan Maraveedu Unni
Keyword(s):  
Electrochemical Reduction ◽  
Fossil Fuels ◽  
Carbon Nanomaterials ◽  
Ammonia Synthesis ◽  
Reduction Reaction ◽  
Extreme Conditions ◽  
Green House Gases ◽  
Nitrogen Reduction ◽  
Green House ◽  
Bosch Process

In contrast to the Haber-Bosch process , which operates at extreme conditions generating green house gases and consuming fossil fuels, ammonia synthesis via electrochemical reduction of nitrogen, functioning at ambient...

Defective Fe3GeTe2 monolayer as a promising electrocatalyst for spontaneous nitrogen reduction reaction

2021 ◽  
Author(s):  
Zuju Ma ◽  
Chengwei Xiao ◽  
Zhitao Cui ◽  
Wei Du ◽  
Qiaohong Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reduction Reaction ◽  
High Catalytic Activity ◽  
Nitrogen Reduction

Defective Fe3GeTe2 exhibits high catalytic activity for the NRR involving six exothermic hydrogenation steps.

Ordered Intermetallic Nanoparticles with High Catalytic Activity Prepared by an Electrochemically Induced Phase Transformation

2019 ◽  
Author(s):  
Du Sun ◽  
yunfei wang ◽  
Kenneth Livi ◽  
chuhong wang ◽  
ruichun luo ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Diffusion Mechanism ◽  
Reduction Reaction ◽  
Atomic Scale ◽  
High Catalytic Activity ◽  
Ambient Conditions ◽  
Magnetic Devices ◽  
Disordered Alloys ◽  
Ordered Intermetallic ◽  
Intermetallic Nanoparticles

<div> <p>The synthesis of alloys with long range atomic scale ordering (ordered intermetallics) is an emerging field of nanochemistry. Ordered intermetallic nanoparticles are useful for a wide variety of applications such as catalysis, superconductors, and magnetic devices. However, the preparation of nanostructured ordered intermetallics is challenging in comparison to disordered alloys, hindering progress in materials development. We report a process for converting colloidally synthesized ordered intermetallic PdBi<sub>2</sub> to ordered intermetallic Pd<sub>3</sub>Bi nanoparticles under ambient conditions by an electrochemically induced phase transition. The low melting point of PdBi<sub>2</sub> corresponds to low vacancy formation energies which enables the facile removal of the Bi from the surface, while simultaneously enabling interdiffusion of the constituent atoms via a vacancy diffusion mechanism under ambient conditions. The resulting phase-converted ordered intermetallic Pd<sub>3</sub>Bi exhibits 11x and 3.5x higher mass activty and high methanol tolerance for the oxygen reduction reaction compared to Pt/C and Pd/C, respectively,which is the highest reported for a Pd-based catalyst, to the best of our knowledge. These results establish a key development in the synthesis of noble metal rich ordered intermetallic phases with high catalytic activity, and sets forth guidelines for the design of ordered intermetallic compounds under ambient conditions.</p> </div>

scholarly journals CO Oxidation Efficiency and Hysteresis Behavior over Mesoporous Pd/SiO2 Catalyst

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 131 ◽  
Author(s):  
Rola Mohammad Al Soubaihi ◽  
Khaled Mohammad Saoud ◽  
Myo Tay Zar Myint ◽  
Mats A. Göthelid ◽  
Joydeep Dutta
Keyword(s):  
Carbon Monoxide ◽  
Catalytic Activity ◽  
Co Oxidation ◽  
Active Sites ◽  
Bond Activation ◽  
Dissociative Adsorption ◽  
High Catalytic Activity ◽  
Good Catalytic Activity ◽  
Pretreatment Conditions ◽  
Oxidation Efficiency

Carbon monoxide (CO) oxidation is considered an important reaction in heterogeneous industrial catalysis and has been extensively studied. Pd supported on SiO2 aerogel catalysts exhibit good catalytic activity toward this reaction owing to their CO bond activation capability and thermal stability. Pd/SiO2 catalysts were investigated using carbon monoxide (CO) oxidation as a model reaction. The catalyst becomes active, and the conversion increases after the temperature reaches the ignition temperature (Tig). A normal hysteresis in carbon monoxide (CO) oxidation has been observed, where the catalysts continue to exhibit high catalytic activity (CO conversion remains at 100%) during the extinction even at temperatures lower than Tig. The catalyst was characterized using BET, TEM, XPS, TGA-DSC, and FTIR. In this work, the influence of pretreatment conditions and stability of the active sites on the catalytic activity and hysteresis is presented. The CO oxidation on the Pd/SiO2 catalyst has been attributed to the dissociative adsorption of molecular oxygen and the activation of the C-O bond, followed by diffusion of adsorbates at Tig to form CO2. Whereas, the hysteresis has been explained by the enhanced stability of the active site caused by thermal effects, pretreatment conditions, Pd-SiO2 support interaction, and PdO formation and decomposition.

scholarly journals Phase-selective active sites on ordered/disordered titanium dioxide enable exceptional photocatalytic ammonia synthesis

2021 ◽  
Author(s):  
Jinsun Lee ◽  
Xinghui Liu ◽  
Ashwani Kumar ◽  
Yosep Hwang ◽  
Eunji Lee ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Active Sites ◽  
Rational Design ◽  
Ammonia Synthesis ◽  
Reduction Reaction ◽  
Band Structures ◽  
Electronic Band ◽  
Defect Sites ◽  
Electronic Band Structures ◽  
Reaction Routes

This work highlights the importance of a rational design for more energetically suitable nitrogen reduction reaction routes and mechanisms by regulating the electronic band structures with phase-selective defect sites.

Efficient N2 Reduction with VS2 Electrocatalyst: Identifying the Active Sites and Unraveling the Reaction Pathway

2021 ◽  
Author(s):  
Liang Zhao ◽  
Rui Zhao ◽  
Yixiang Zhou ◽  
Xiaoxuan Wang ◽  
Xinyue Chi ◽  
...  
Keyword(s):  
Active Sites ◽  
Reaction Pathway ◽  
Reduction Reaction ◽  
Sustainable Production ◽  
Nitrogen Reduction

Electrochemical nitrogen reduction reaction (NRR) is an effective method for sustainable production of NH3. However, a robust NRR electrocatalyst is predominantly required in order to active the inert N2 molecule....

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