scholarly journals Transition Metal Oxynitrides Catalysts for Electrochemical Reduction of Nitrogen to Ammonia

2021 ◽  
Author(s):  
Damilola Ologunagba ◽  
Shyam Kattel
Keyword(s):  
Density Functional Theory ◽  
Transition Metal ◽  
Dft Calculations ◽  
Electrochemical Reduction ◽  
Density Functional ◽  
Reduction Reaction ◽  
Ambient Conditions ◽  
Functional Theory ◽  
Nitrogen Reduction ◽  
Bosch Process

Electrochemical nitrogen reduction reaction (ENRR) at ambient conditions is beneficial compared to energy intensive thermochemical Haber-Bosch process for NH3 production. Here, periodic density functional theory (DFT) calculations are carried out...

Density functional theory study of transition metal single-atoms anchored on graphyne as efficient electrocatalysts for the nitrogen reduction reaction

2021 ◽  
Author(s):  
Wei Song ◽  
Kun Xie ◽  
Jinlong Wang ◽  
Yongliang Guo ◽  
Chaozheng He ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Free Energy ◽  
Transition Metal ◽  
Density Functional ◽  
Reduction Reaction ◽  
Density Functional Theory Study ◽  
Free Energies ◽  
Functional Theory ◽  
Nitrogen Reduction ◽  
Single Atoms

(a) Screening results of TM@GY for the NRR based on the free energy changes of the first and last hydrogenation steps (ΔG(*N2 → *N2H) and ΔG(*NH2 → *NH3)), respectively. (b) The free energies for H and N2 adsorption on all the TM@GY.

scholarly journals Probing the activity of transition metal M and heteroatom N4 co-doped in vacancy fullerene (M–N4–C64, M = Fe, Co, and Ni) towards the oxygen reduction reaction by density functional theory

RSC Advances ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 3174-3182
Author(s):  
Siwei Yang ◽  
Chaoyu Zhao ◽  
Ruxin Qu ◽  
Yaxuan Cheng ◽  
Huiling Liu ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Transition Metal ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Density Functional ◽  
Reduction Reaction ◽  
Functional Theory ◽  
Co Doped

In this study, a novel type oxygen reduction reaction (ORR) electrocatalyst is explored using density functional theory (DFT); the catalyst consists of transition metal M and heteroatom N4 co-doped in vacancy fullerene (M–N4–C64, M = Fe, Co, and Ni).

A systematic computational investigations of water splitting and N2 reduction reaction performances of monolayer MBenes

2021 ◽  
Author(s):  
Yuwen Cheng ◽  
Jisheng Mo ◽  
Yongtao Li ◽  
Yan Song ◽  
Yumin Zhang
Keyword(s):  
Density Functional Theory ◽  
Transition Metal ◽  
Water Splitting ◽  
Density Functional ◽  
Reduction Reaction ◽  
Functional Theory ◽  
Energy Conversion And Storage ◽  
Metal Borides ◽  
Potential Applications ◽  
And Storage

Recently, transition metal borides (MBenes, analogous to MXenes) have been attracted interest due to their potential applications in energy conversion and storage. In this work, we performed density functional theory...

Oxygen reduction reaction mechanism on P, N co-doped graphene: a density functional theory study

2019 ◽  
Vol 43 (48) ◽  
pp. 19308-19317 ◽  
Author(s):  
Zhao Liang ◽  
Chao Liu ◽  
Mingwei Chen ◽  
Xiaopeng Qi ◽  
Pramod Kumar U. ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Catalytic Activity ◽  
Reaction Mechanism ◽  
Dft Calculations ◽  
Density Functional ◽  
Reduction Reaction ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Doped Graphene ◽  
Co Doped

DFT calculations confirmed that the P–N coupled site changed the ORR pathway and improved the catalytic activity compared with single doping.

scholarly journals Decoupling strain and ligand effects in ternary nanoparticles for improved ORR electrocatalysis

2016 ◽  
Vol 18 (35) ◽  
pp. 24737-24745 ◽  
Author(s):  
Paul C. Jennings ◽  
Steen Lysgaard ◽  
Heine A. Hansen ◽  
Tejs Vegge
Keyword(s):  
Density Functional Theory ◽  
Transition Metal ◽  
Oxygen Reduction Reaction ◽  
Density Functional ◽  
Pt Nanoparticles ◽  
Reduction Reaction ◽  
Functional Theory ◽  
Transition Metal Nanoparticles ◽  
Ligand Effects ◽  
Adsorption Energies

Ternary Pt–Au–M (M = 3d transition metal) nanoparticles show reduced OH adsorption energies and improved activity for the oxygen reduction reaction (ORR) compared to pure Pt nanoparticles, as obtained by density functional theory.

Development of transition-metal-catalyzed cycloaddition reactions leading to polycarbocyclic systems

2011 ◽  
Vol 83 (3) ◽  
pp. 495-506 ◽  
Author(s):  
Moisés Gulías ◽  
Fernando López ◽  
José L. Mascareñas
Keyword(s):  
Density Functional Theory ◽  
Transition Metal ◽  
Dft Calculations ◽  
Density Functional ◽  
Conjugated Dienes ◽  
Ni Catalysts ◽  
Functional Theory ◽  
Different Types ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed

We present a compilation of methodologies developed in our laboratories to assemble polycyclic structures containing small- and medium-sized cycles, relying on the use of transition-metal-catalyzed (TMC) cycloadditions. First, we discuss the use of alkylidenecyclopropanes (ACPs) as 3C-atom partners, in particular in their Pd-catalyzed (3 + 2) cycloadditions with alkynes, alkenes, and allenes, reactions that lead to cyclopentane-containing polycyclic products in excellent yields. Then, we present the expansion of this chemistry to a (4 + 3) annulation with conjugated dienes, and to inter- and intramolecular (3 + 2 + 2) cycloadditions using external alkenes as additional 2C-π-systems. These reactions allow the preparation of different types of polycyclic structures containing cycloheptene rings, the topology of the products depending on the use of Pd or Ni catalysts. Finally, we include our more recent discoveries on the development of (4 + 3) and (4 + 2) intramolecular cyclo-additions of allenes and dienes, promoted by Pt and Au catalysts, and discuss mechanistic insights supported by experimental and density functional theory (DFT) calculations. An enantioselective version of the (4 + 2) cycloaddition with phosphoramidite Au(I) catalysts is also presented.

Identification of optimally stable nanocluster geometries via mathematical optimization and density-functional theory

2020 ◽  
Vol 5 (1) ◽  
pp. 232-244 ◽  
Author(s):  
Natalie M. Isenberg ◽  
Michael G. Taylor ◽  
Zihao Yan ◽  
Christopher L. Hanselman ◽  
Giannis Mpourmpakis ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Transition Metal ◽  
Dft Calculations ◽  
Density Functional ◽  
Mathematical Optimization ◽  
Metal Nanoclusters ◽  
Functional Theory

A novel methodology combining mathematical optimization with DFT calculations is developed to determine highly cohesive transition metal nanoclusters.

Heteroatom-Doped Transition Metal Nitrides for CO Electrochemical Reduction: A Density Functional Theory Screening Study

2020 ◽  
Vol 124 (48) ◽  
pp. 26344-26351
Author(s):  
Mohammadreza Karamad ◽  
Amir Barati Farimani ◽  
Rishikesh Magar ◽  
Samira Siahrostami ◽  
Ian D. Gates
Keyword(s):  
Density Functional Theory ◽  
Transition Metal ◽  
Electrochemical Reduction ◽  
Density Functional ◽  
Metal Nitrides ◽  
Transition Metal Nitrides ◽  
Functional Theory ◽  
Screening Study
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