Evaluation of different Ni–semiconductor composites as electrodes for enhanced hydrogen evolution reaction

Much research has been done on reliable and low-cost electrocatalysts for hydrogen generation by water splitting. In this study, we synthesized thin films of silver selenide (Ag2Se) using a simple thermal evaporation route and demonstrated their electrocatalytic hydrogen evolution reaction (HER) activity. The Ag2Se catalysts show improved electrochemical surface area and good HER electrocatalytic behavior (367 mV overpotential @ 10 mA·cm−2, exchange current density: ~1.02 × 10−3 mA·cm−2, and Tafel slope: 53 mV·dec−1) in an acidic medium). The reliability was checked in 0.5 M sulfuric acid over 20 h. Our first-principles calculations show the optimal energy of hydrogen adsorption, which is consistent with experimental results. The works could be further extended for finding a new catalyst by associating the selenide, sulfide or telluride-based materials without complex catalyst synthesis procedures.

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Nanoscale engineering and Mo-doping of 2D ultrathin ReS2 nanosheets for remarkable electrocatalytic hydrogen generation

Nanoscale ◽

10.1039/d0nr03693e ◽

2020 ◽

Vol 12 (32) ◽

pp. 17045-17052

Author(s):

Jun Xu ◽

Changji Fang ◽

Zhiqian Zhu ◽

Jingwen Wang ◽

Bansui Yu ◽

...

Keyword(s):

Hydrogen Evolution ◽

Hydrogen Evolution Reaction ◽

Electrocatalytic Activity ◽

Hydrogen Generation ◽

Significant Enhancement ◽

Mo Doping

Improved conductivity and activated basal planes of ReS2 nanosheets are realized by heteroatom Mo-doping, which results in a significant enhancement in electrocatalytic activity for the hydrogen evolution reaction.

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Enhanced Hydrogen Evolution Reaction in Surface Functionalized MoS2 Monolayers

Catalysts ◽

10.3390/catal11010070 ◽

2021 ◽

Vol 11 (1) ◽

pp. 70

Author(s):

Sangyeon Pak ◽

Jungmoon Lim ◽

John Hong ◽

SeungNam Cha

Keyword(s):

Hydrogen Evolution ◽

Hydrogen Evolution Reaction ◽

Hydrogen Generation ◽

Low Cost ◽

Transition Metal Dichalcogenides ◽

Underlying Mechanism ◽

Mos2 Monolayer ◽

N Doping ◽

Metal Dichalcogenides ◽

Mos2 Monolayers

Monolayered, semiconducting MoS2 and their transition metal dichalcogenides (TMDCs) families are promising and low-cost materials for hydrogen generation through electrolytes (HER, hydrogen evolution reaction) due to their high activities and electrochemical stability during the reaction. However, there is still a lack of understanding in identifying the underlying mechanism responsible for improving the electrocatalytic properties of theses monolayers. In this work, we investigated the significance of controlling carrier densities in a MoS2 monolayer and in turn the corresponding electrocatalytic behaviors in relation to the energy band structure of MoS2. Surface functionalization was employed to achieve p-doping and n-doping in the MoS2 monolayer that led to MoS2 electrochemical devices with different catalytic performances. Specifically, the electron-rich MoS2 surface showed lower overpotential and Tafel slope compared to the MoS2 with surface functional groups that contributed to p-doping. We attributed such enhancement to the increase in the carrier density and the corresponding Fermi level that accelerated HER and charge transfer kinetics. These findings are of high importance in designing electrocatalysts based on two-dimensional TMDCs.

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Anchoring and space-confinement effects to form ultrafine Ru nanoclusters for efficient hydrogen generation

Journal of Materials Chemistry A ◽

10.1039/c8ta03249a ◽

2018 ◽

Vol 6 (28) ◽

pp. 13859-13866 ◽

Cited By ~ 27

Author(s):

Jian Yang ◽

Heng Guo ◽

Shulin Chen ◽

Yulan Li ◽

Chao Cai ◽

...

Keyword(s):

Hydrogen Evolution ◽

Hydrogen Evolution Reaction ◽

Hydrogen Generation ◽

Low Cost ◽

Confinement Effects ◽

Highly Efficient

Developing highly efficient, durable, and low-cost catalysts for the hydrogen evolution reaction (HER) is an eternal pursuit for scientists to replace Pt-based catalysts.

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An organic ligand promoting the electrocatalytic activity of cobalt oxide for the hydrogen evolution reaction

Sustainable Energy & Fuels ◽

10.1039/c9se00371a ◽

2019 ◽

Vol 3 (9) ◽

pp. 2205-2210 ◽

Cited By ~ 2

Author(s):

Chien-Hong Chen ◽

Tzung-Wen Chiou ◽

Han-Chun Chang ◽

Wei-Liang Li ◽

Chi-Yen Tung ◽

...

Keyword(s):

Renewable Energy ◽

Hydrogen Evolution ◽

Water Splitting ◽

Hydrogen Evolution Reaction ◽

Electrocatalytic Activity ◽

Low Cost ◽

Renewable Energy Sources ◽

Organic Ligand ◽

Energy Sources ◽

And Storage

In electrocatalytic water splitting, active, stable and low-cost hydrogen evolution electrocatalysts play key roles in the conversion and storage of renewable energy sources.

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A crystalline–amorphous Ni–Ni(OH)2 core–shell catalyst for the alkaline hydrogen evolution reaction

Journal of Materials Chemistry A ◽

10.1039/d0ta08735a ◽

2020 ◽

Vol 8 (44) ◽

pp. 23323-23329

Author(s):

Jing Hu ◽

Siwei Li ◽

Yuzhi Li ◽

Jing Wang ◽

Yunchen Du ◽

...

Keyword(s):

Hydrogen Evolution ◽

Hydrogen Evolution Reaction ◽

Electrocatalytic Activity ◽

Core Shell ◽

Alkaline Conditions

Crystalline–amorphous Ni–Ni(OH)2 core–shell assembled nanosheets exhibit outstanding electrocatalytic activity and stability for hydrogen evolution under alkaline conditions.

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2,2’-Dipyridylamine as Organic Molecular Electrocatalyst for Hydrogen Evolution Reaction in Acidic Electrolytes

10.26434/chemrxiv.8273627.v1 ◽

2019 ◽

Cited By ~ 1

Author(s):

Xi Yin ◽

Ling Lin ◽

Hoon T. Chung ◽

Ulises Martinez ◽

Andrew M. Baker ◽

...

Keyword(s):

Hydrogen Evolution ◽

Hydrogen Evolution Reaction ◽

Density Functional ◽

Low Cost ◽

Membrane Electrode Assembly ◽

Carbon Surface ◽

Membrane Electrode ◽

Durability Test ◽

Onset Potential ◽

Precious Metal Catalysts

Finding a low-cost and stable electrocatalyst for hydrogen evolution reaction (HER) as a replacement for scarce and expensive precious metal catalysts has attracted significant interest from chemical and materials research communities. Here, we demonstrate an organic catalyst based on 2,2’-dipyridylamine (dpa) molecules adsorbed on carbon surface, which shows remarkable hydrogen evolution activity and performance durability in strongly acidic polymer electrolytes without involving any metal. The HER onset potential at dpa adsorbed on carbon has been found to be less than 50 mV in sulfuric acid and in a Nafion-based membrane electrode assembly (MEA). At the same time, this catalyst has shown no performance loss in a 60-hour durability test. The HER reaction mechanisms and the low onset overpotential in this system are revealed based on electrochemical study. Density functional theory (DFT) calculations suggest that the pyridyl-N functions as the active site for H adsorption with a free energy of -0.13 eV, in agreement with the unusually low onset overpotential for an organic molecular catalyst.<br>

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2,2’-Dipyridylamine as Organic Molecular Electrocatalyst for Hydrogen Evolution Reaction in Acidic Electrolytes

10.26434/chemrxiv.8273627 ◽

2019 ◽

Author(s):

Xi Yin ◽

Ling Lin ◽

Hoon T. Chung ◽

Ulises Martinez ◽

Andrew M. Baker ◽

...

Keyword(s):

Hydrogen Evolution ◽

Hydrogen Evolution Reaction ◽

Density Functional ◽

Low Cost ◽

Membrane Electrode Assembly ◽

Carbon Surface ◽

Membrane Electrode ◽

Durability Test ◽

Onset Potential ◽

Precious Metal Catalysts

Finding a low-cost and stable electrocatalyst for hydrogen evolution reaction (HER) as a replacement for scarce and expensive precious metal catalysts has attracted significant interest from chemical and materials research communities. Here, we demonstrate an organic catalyst based on 2,2’-dipyridylamine (dpa) molecules adsorbed on carbon surface, which shows remarkable hydrogen evolution activity and performance durability in strongly acidic polymer electrolytes without involving any metal. The HER onset potential at dpa adsorbed on carbon has been found to be less than 50 mV in sulfuric acid and in a Nafion-based membrane electrode assembly (MEA). At the same time, this catalyst has shown no performance loss in a 60-hour durability test. The HER reaction mechanisms and the low onset overpotential in this system are revealed based on electrochemical study. Density functional theory (DFT) calculations suggest that the pyridyl-N functions as the active site for H adsorption with a free energy of -0.13 eV, in agreement with the unusually low onset overpotential for an organic molecular catalyst.<br>

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Hierarchically porous FeNi3@FeNi layered double hydroxide nanostructures: One-step fast electrodeposition and highly efficient electrocatalytic performances for overall water splitting

Dalton Transactions ◽

10.1039/d0dt04366d ◽

2021 ◽

Author(s):

Zihao Liu ◽

Shifeng Li ◽

Fangfang Wang ◽

Mingxia Li ◽

Yonghong Ni

Keyword(s):

Hydrogen Evolution ◽

Water Splitting ◽

Oxygen Evolution ◽

Layered Double Hydroxide ◽

Hydrogen Evolution Reaction ◽

Oxygen Evolution Reaction ◽

Electrocatalytic Activity ◽

Hierarchically Porous ◽

One Step ◽

Double Hydroxide

FeNi-layered double hydroxide (LDH) is thought to be an excellent electrocatalyst for oxygen evolution reaction (OER), but it always shows extremely poor electrocatalytic activity toward hydrogen evolution reaction (HER) in...

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