Well-aligned metal–organic framework array-derived CoS2 nanosheets toward robust electrochemical water splitting

2018 ◽  
Vol 2 (9) ◽  
pp. 1732-1738 ◽  
Author(s):  
Na Yao ◽  
Tan Tan ◽  
Fulin Yang ◽  
Gongzhen Cheng ◽  
Wei Luo
Keyword(s):  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Alkaline Media ◽  
Carbon Cloth ◽  
Two Dimensional ◽  
Metal Organic ◽  
Hierarchical Architectures ◽  
Electrochemical Water Splitting

Highly open three-dimensional (3D) hierarchical architectures composed of two-dimensional (2D) CoS2 nanosheets grown on carbon cloth (CoS2 NS/CC) have been synthesized by vulcanizing well-aligned MOF-array precursors and further used as superior bifunctional electrocatalysts toward the hydrogen evolution reaction (HER), the oxygen evolution reaction (OER), and overall water splitting under alkaline media.

scholarly journals Hierarchically Ordinated Two-Dimensional MoS2 Nanosheets on Three-Dimensional Reduced Graphene Oxide Aerogels as Highly Active and Stable Catalysts for Hydrogen Evolution Reaction

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 182
Author(s):  
Hyeonggeun Choi ◽  
Suok Lee ◽  
Min-Cheol Kim ◽  
Yeonsu Park ◽  
A-Rang Jang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hydrogen Production ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Mos2 Nanosheets ◽  
Reduced Graphene ◽  
Electrochemical Water Splitting

Hydrogen gas (H2) is being intensively proposed as a next-generation clean energy owing to the depletion of fossil fuels. Electrochemical water splitting is one of the most promising processes for hydrogen production. Furthermore, many efforts focusing on electrochemical water splitting have been made to develop low-cost, electrochemically active, and stable catalysts for efficient hydrogen production. MoS2 has emerged as an attractive material for developing catalysts for the hydrogen evolution reaction (HER). Hence, in this study, we design hierarchically ordinated two-dimensional (2D) MoS2 nanosheets on three-dimensional (3D) reduced graphene oxide (rGO) (H-2D/3D-MoS2-rGO) aerogel structures as a new class of electrocatalysts for the HER. We use the one-pot hydrothermal synthesis route for developing high-performance electroactive materials for the HER. The as-prepared H-2D/3D-MoS2-rGO contains a unique 3D hierarchical structure providing large surface areas owing to the 3D porous networks of rGO and more active sites owing to the many edge sites in the MoS2 nanosheets. In addition, the H-2D/3D-MoS2-rGO structure exhibits remarkable electrochemical properties during the HER. It shows a lower overpotential than pure MoS2 and excellent electrochemical stability owing to the large number of active sites (highly exposed edge sites) and high electrical conductivity from the rGO structure.

Cobalt Metal Organic Framework (Co-MOF) derived CoSe2/C hybrid nanostructures for Electrochemical Hydrogen Evolution Reaction Supported by DFT Studies

2022 ◽  
Author(s):  
Jogendra Nath Behera ◽  
Rajat Kumar Tripathy ◽  
Aneeya K Samantara ◽  
Pratap Mane ◽  
Brahmananda Chakraborty
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Molecular Hydrogen ◽  
Metal Organic Framework ◽  
Hybrid Nanostructures ◽  
Cobalt Metal ◽  
Dft Studies ◽  
Metal Organic ◽  
Electrochemical Water Splitting

Generation of molecular hydrogen by electrochemical water splitting is a promising approach and its efficiency strictly adhere on the electrocatalyst used. Therefore, it’s an ongoing challenge to design materials having...

Three-Dimensional Hierarchical Architectures Derived from Surface-Mounted Metal-Organic Framework Membranes for Enhanced Electrocatalysis

2017 ◽  
Vol 129 (44) ◽  
pp. 13969-13973 ◽  
Author(s):  
Gan Jia ◽  
Wen Zhang ◽  
Guozheng Fan ◽  
Zhaosheng Li ◽  
Degang Fu ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Three Dimensional ◽  
Metal Organic ◽  
Hierarchical Architectures ◽  
Organic Framework

scholarly journals Mechanochemical Synthesis of a Mercury(II) Metal-Organic Framework Reveals a Two-Dimensional Polymorph Stabilized by Weak Interactions

2019 ◽  
Author(s):  
Isaiah R. Speight ◽  
Igor Huskić ◽  
Mihails Arhangelskis ◽  
Hatem M. Titi ◽  
Robin Stein ◽  
...  
Keyword(s):  
Density Functional ◽  
Weak Interactions ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Density Functional Theory Calculations ◽  
Dimensional Structure ◽  
Reaction Monitoring ◽  
Two Dimensional ◽  
Functional Theory ◽  
Metal Organic

Solid-state mechanochemistry revealed a novel polymorph of the mercury(II) imidazolate framework, based on square-grid (sql) topology layers. Reaction monitoring and periodic density functional theory calculations show that the sql-structure is of higher stability than the previously reported three-dimensional structure, with the unexpected stabilization of a lower dimensionality structure explained by contributions of weak interactions, which include short C-H···Hg contacts.

Metal–organic framework-guided growth of Mo2C embedded in mesoporous carbon as a high-performance and stable electrocatalyst for the hydrogen evolution reaction

2016 ◽  
Vol 4 (41) ◽  
pp. 16225-16232 ◽  
Author(s):  
M. Qamar ◽  
A. Adam ◽  
B. Merzougui ◽  
A. Helal ◽  
O. Abdulhamid ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Mesoporous Carbon ◽  
High Performance ◽  
Metal Organic Framework ◽  
Nucleation And Growth ◽  
Guided Growth ◽  
Metal Organic ◽  
Organic Framework

Metal–organic framework is utilized as a confined-template for restrained nucleation and growth of Mo2C electrocatalyst for highly efficient water splitting.

Ultrafine bimetallic phosphide nanoparticles embedded in carbon nanosheets: two-dimensional metal–organic framework-derived non-noble electrocatalysts for the highly efficient oxygen evolution reaction

Nanoscale ◽  
2018 ◽  
Vol 10 (42) ◽  
pp. 19774-19780 ◽  
Author(s):  
Min Jiang ◽  
Jun Li ◽  
Xiaofan Cai ◽  
Yu Zhao ◽  
Lijia Pan ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Metal Organic Framework ◽  
Alkaline Media ◽  
Two Dimensional ◽  
Carbon Nanosheets ◽  
Highly Efficient ◽  
Metal Organic ◽  
Organic Framework

The Co1−xFexP/C nanosheets are synthesized using a 2D MOF as the precursor for highly efficient OER catalysis in alkaline media.

scholarly journals Cobalt-Based Metal-Organic Frameworks and Their Derivatives for Hydrogen Evolution Reaction

2020 ◽  
Vol 8 ◽  
Author(s):  
Wenjuan Han ◽  
Minhan Li ◽  
Yuanyuan Ma ◽  
Jianping Yang
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Alternative Energy ◽  
Metal Organic Frameworks ◽  
Electrochemical Performances ◽  
Promising Alternative ◽  
Metal Organic ◽  
Electrochemical Water Splitting

Hydrogen has been considered as a promising alternative energy to replace fossil fuels. Electrochemical water splitting, as a green and renewable method for hydrogen production, has been drawing more and more attention. In order to improve hydrogen production efficiency and lower energy consumption, efficient catalysts are required to drive the hydrogen evolution reaction (HER). Cobalt (Co)-based metal-organic frameworks (MOFs) are porous materials with tunable structure, adjustable pores and large specific surface areas, which has attracted great attention in the field of electrocatalysis. In this review, we focus on the recent progress of Co-based metal-organic frameworks and their derivatives, including their compositions, morphologies, architectures and electrochemical performances. The challenges and development prospects related to Co-based metal-organic frameworks as HER electrocatalysts are also discussed, which might provide some insight in electrochemical water splitting for future development.

Characterization and gas adsorption of a novel three-dimensional metal–organic framework (MOF) generated from a new polydentate fluorene-bridged ligand

2018 ◽  
Vol 74 (2) ◽  
pp. 212-217 ◽  
Author(s):  
Shu-Ying Han ◽  
Xue Niu ◽  
Jia Wang ◽  
Guo-Xia Jin ◽  
Ai Liu ◽  
...  
Keyword(s):  
Gas Adsorption ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Solvothermal Reaction ◽  
Two Dimensional ◽  
Polydentate Ligand ◽  
Dimensional Network ◽  
Metal Organic ◽  
Organic Framework

A polydentate ligand bridged by a fluorene group, namely 9,9-bis(2-hydroxyethyl)-2,7-bis(pyridin-4-yl)fluorene (L), has been prepared under solvothermal conditions in acetonitrile. Crystals of the three-dimensional metal–organic framework (MOF) poly[[[μ3-9,9-bis(2-hydroxyethyl)-2,7-bis(pyridin-4-yl)fluorene-κ3 N:N′:O]bis(methanol-κO)(μ-sulfato-κ2 O:O′)nickel(II)] methanol disolvate], {[Ni(SO4)(C27H24N2O2)(CH3OH)]·2CH3OH} n , (I), were obtained by the solvothermal reaction of L and NiSO4 in methanol. The ligand L forms a two-dimensional network in the crystallographic bc plane via two groups of O—H...N hydrogen bonds and neighbouring two-dimensional planes are completely parallel and stack to form a three-dimensional structure. In (I), the NiII ions are linked by sulfate ions through Ni—O bonds to form inorganic chains and these Ni-containing chains are linked into a three-dimensional framework via Ni—O and Ni—N bonds involving the polydentate ligand L. With one of the hydroxy groups of L coordinating to the NiII atom, the torsion angle of the hydroxyethyl group changes from that of the uncoordinated molecule. In addition, the adsorption properties of (I) with carbon dioxide were investigated.

scholarly journals Electronic Structure and d-Band Center Control Engineering over Ni-Doped CoP3 Nanowall Arrays for Boosting Hydrogen Production

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1595
Author(s):  
Jing Qi ◽  
Tianli Wu ◽  
Mengyao Xu ◽  
Dan Zhou ◽  
Zhubing Xiao
Keyword(s):  
Electronic Structure ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Three Dimensional ◽  
Carbon Cloth ◽  
Ni Doping ◽  
Band Center ◽  
Electrocatalytic Performance ◽  
Gaseous Transfer

To address the challenge of highly efficient water splitting into H2, successful fabrication of novel porous three-dimensional Ni-doped CoP3 nanowall arrays on carbon cloth was realized, resulting in an effective self-supported electrode for the electrocatalytic hydrogen-evolution reaction. The synthesized samples exhibit rough, curly, and porous structures, which are beneficial for gaseous transfer and diffusion during the electrocatalytic process. As expected, the obtained Ni-doped CoP3 nanowall arrays with a doping concentration of 7% exhibit the promoted electrocatalytic activity. The achieved overpotentials of 176 mV for the hydrogen-evolution reaction afford a current density of 100 mA cm−2, which indicates that electrocatalytic performance can be dramatically enhanced via Ni doping. The Ni-doped CoP3 electrocatalysts with increasing catalytic activity should have significant potential in the field of water splitting into H2. This study also opens an avenue for further enhancement of electrocatalytic performance through tuning of electronic structure and d-band center by doping.

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