Highly active MoS2/carbon electrocatalysts for the hydrogen evolution reaction – insight into the effect of the internal resistance and roughness factor on the Tafel slope

2017 ◽  
Vol 19 (3) ◽  
pp. 1988-1998 ◽  
Author(s):  
Arun Prasad Murthy ◽  
Jayaraman Theerthagiri ◽  
Jagannathan Madhavan ◽  
Kadarkarai Murugan
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Internal Resistance ◽  
Roughness Factor ◽  
Tafel Slope ◽  
Highly Active ◽  
Kinetics Of ◽  
Insight Into

EIS has been employed in an extensive Tafel analysis to reveal the true HER kinetics of MoS2 and MoS2/C electrocatalysts.

N-doped carbon-coated cobalt nanorod arrays supported on a titanium mesh as highly active electrocatalysts for the hydrogen evolution reaction

2015 ◽  
Vol 3 (5) ◽  
pp. 1915-1919 ◽  
Author(s):  
Weijia Zhou ◽  
Yucheng Zhou ◽  
Linjing Yang ◽  
Jilin Huang ◽  
Yunting Ke ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Robust Stability ◽  
Hydrogen Evolution Reaction ◽  
Nanorod Arrays ◽  
Titanium Mesh ◽  
Tafel Slope ◽  
Highly Active ◽  
Carbon Coated ◽  
Ti Mesh

N-doped carbon-coated cobalt nanorod arrays on a Ti mesh exhibited efficient HER performance with an overpotential of −56 mV, a Tafel slope of 78.2 mV dec−1 and robust stability.

Highly active and durable self-standing WS2/graphene hybrid catalysts for the hydrogen evolution reaction

2016 ◽  
Vol 4 (24) ◽  
pp. 9472-9476 ◽  
Author(s):  
Haiqing Zhou ◽  
Fang Yu ◽  
Jingying Sun ◽  
Ran He ◽  
Yumei Wang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Current Density ◽  
Ni Foam ◽  
Tafel Slope ◽  
3D Graphene ◽  
Hybrid Catalysts ◽  
Highly Active ◽  
Large Current ◽  
Large Current Density

Efficient hydrogen evolution catalysts are fabricated by growing WS2 on 3D graphene/Ni foam, featured by large current density (10 mA cm−2 at −119 mV) and low Tafel slope (∼43 mV per dec), outperforming most previous WS2 catalysts.

A computational study on Pt and Ru dimers supported on graphene for the hydrogen evolution reaction: new insight into the alkaline mechanism

2019 ◽  
Vol 7 (8) ◽  
pp. 3648-3654 ◽  
Author(s):  
Xin Liu ◽  
Yan Jiao ◽  
Yao Zheng ◽  
Kenneth Davey ◽  
Shi-Zhang Qiao
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Computational Study ◽  
Dissociative Chemisorption ◽  
Thermodynamics And Kinetics ◽  
Kinetics Of ◽  
Insight Into ◽  
Chemisorption Energy

The dissociative chemisorption energy of water was proposed to address both thermodynamics and kinetics of alkaline hydrogen evolution.

scholarly journals Cysteine-Induced Hybridization of 2D Molybdenum Disulfide Films for Efficient and Stable Hydrogen Evolution Reaction

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1165
Author(s):  
Arunas Jagminas ◽  
Paulius Gaigalas ◽  
Carla Bittencourt ◽  
Vaclovas Klimas
Keyword(s):  
Electron Microscopy ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Photoelectron Spectroscopy ◽  
Hydrogen Adsorption ◽  
Hydrothermal Process ◽  
Linear Sweep Voltammetry ◽  
One Pot ◽  
Tafel Slope ◽  
Highly Active

The noble, metal-free materials capable of efficiently catalyzing water splitting reactions currently hold a great deal of promise. In this study, we reported the structure and electrochemical performance of new MoS2-based material synthesized with L-cysteine. For this, a facile one-pot hydrothermal process was developed and an array of densely packed nanoplatelet-shaped hybrid species directly on a conductive substrate were obtained. The crucial role of L-cysteine was determined by numerous methods on the structure and composition of the synthesized material and its activity and stability for hydrogen evolution reaction (HER) from the acidic water. A low Tafel slope of 32.6 mV dec−1, close to a Pt cathode, was registered for the first time. The unique HER performance at the surface of this hybrid material in comparison with recently reported MoS2-based electrocatalysts was attributed to the formation of more defective 1T, 2H-MoS2/MoOx, C nanostructures with the dominant 1T-MoS2 phase and thermally degraded cysteine residues entrapped. Numerous stacks of metallic (1T-MoS2 and MoO2) and semiconducting (2H-MoS2 and MoO3) fragments relayed the formation of highly active layered nanosheets possessing a low hydrogen adsorption free energy and much greater durability, whereas intercalated cysteine fragments had a low Tafel slope of the HER reaction. X-ray photoelectron spectroscopy, scanning electron microscopy, thermography with mass spectrometry, high-resolution transmission electron microscopy, Raman spectroscopy techniques, and linear sweep voltammetry were applied to verify our findings.

scholarly journals A Mini Review on Doped Nickel-Based Electrocatalysts for Hydrogen Evolution Reaction

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4651
Author(s):  
Yilin Deng ◽  
Wei Lai ◽  
Bin Xu
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Water Electrolysis ◽  
Energy Resources ◽  
Alkaline Media ◽  
Hydrogen Energy ◽  
Heteroatom Doping ◽  
Highly Active ◽  
Production Of Hydrogen

The energy crisis and environmental pollution have attracted much attention and have promoted researches on clean and sustainable hydrogen energy resources. With the help of highly active and stable transition metal nickel-based catalysts, the production of hydrogen from water electrolysis from electrolyzed water has become an inexpensive and efficient strategy for generating hydrogen energy. In recent years, heteroatom doping has been found to be an effective strategy to improve the electrocatalytic hydrogen evolution reaction (HER) performances of nickel-based catalysts in acidic, neutral, and alkaline media. This review will highlight many recent works of inexpensive and readily available heteroatom-doped nickel-based HER catalysts. The evaluation methods for the performances of HER catalyst will be briefly described, and the role of heteroatom doping and its application in nickel-based catalyst will be summarized. This article will also point out some heteroatom doping strategies, which may provide references and inspire the design of other catalysts with dopants.

Copper complexes as catalyst precursors in the electrochemical hydrogen evolution reaction

2016 ◽  
Vol 45 (16) ◽  
pp. 6974-6982 ◽  
Author(s):  
Merle Kügler ◽  
Julius Scholz ◽  
Andreas Kronz ◽  
Inke Siewert
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Copper Complexes ◽  
Highly Active

Two copper complexes were investigated with respect to their activity in the electrocatalysed hydrogen evolution reaction. The complexes are precursors for highly active copper(0) and Cu2O deposits.

Planar‐Coordination PdSe 2 Nanosheets as Highly Active Electrocatalyst for Hydrogen Evolution Reaction

2021 ◽  
pp. 2102321
Author(s):  
Zhiping Lin ◽  
BeiBei Xiao ◽  
Zongpeng Wang ◽  
Weiying Tao ◽  
Shijie Shen ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Highly Active
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