Tungsten-based porous thin-films for electrocatalytic hydrogen generation

2015 ◽  
Vol 3 (11) ◽  
pp. 5798-5804 ◽  
Author(s):  
Huilong Fei ◽  
Yang Yang ◽  
Xiujun Fan ◽  
Gunuk Wang ◽  
Gedeng Ruan ◽  
...  
Keyword(s):  
Thin Films ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Energy Production ◽  
Hydrogen Generation ◽  
Precious Metals ◽  
Clean Energy ◽  
Porous Thin Films

Developing inexpensive and efficient electrocatalysts without using precious metals for the hydrogen evolution reaction (HER) is essential for the realization of economical clean energy production.

scholarly journals Fabrication of Highly Textured 2D SnSe Layers with Tunable Electronic Properties for Hydrogen Evolution

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3319
Author(s):  
Qianyu Zhou ◽  
Mengya Wang ◽  
Yong Li ◽  
Yanfang Liu ◽  
Yuanfu Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Electronic Properties ◽  
Hydrogen Evolution ◽  
Hydrogen Generation ◽  
Cost Effective ◽  
Clean Energy ◽  
Two Dimensional Materials ◽  
Structural And Electronic Properties ◽  
Electron Migration ◽  
P Type

Hydrogen is regarded to be one of the most promising renewable and clean energy sources. Finding a highly efficient and cost-effective catalyst to generate hydrogen via water splitting has become a research hotspot. Two-dimensional materials with exotic structural and electronic properties have been considered as economical alternatives. In this work, 2D SnSe films with high quality of crystallinity were grown on a mica substrate via molecular beam epitaxy. The electronic property of the prepared SnSe thin films can be easily and accurately tuned in situ by three orders of magnitude through the controllable compensation of Sn atoms. The prepared film normally exhibited p-type conduction due to the deficiency of Sn in the film during its growth. First-principle calculations explained that Sn vacancies can introduce additional reactive sites for the hydrogen evolution reaction (HER) and enhance the HER performance by accelerating electron migration and promoting continuous hydrogen generation, which was mirrored by the reduced Gibbs free energy by a factor of 2.3 as compared with the pure SnSe film. The results pave the way for synthesized 2D SnSe thin films in the applications of hydrogen production.

Self-assembly of Bimetallic Polyoxometalates and Dicyandiamide to form Co/WC@NC for Efficiently Electrochemical Hydrogen generation

2021 ◽  
Author(s):  
Yan Liu ◽  
Jiao Li ◽  
Dan Sun ◽  
Linglan Men ◽  
Bo Sun ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Self Assembly ◽  
Hydrogen Generation ◽  
Clean Energy ◽  
Energy Technology ◽  
Clean Energy Technology

The design of economical and efficient electrocatalyst to replace precious platinum-based catalysts for hydrogen evolution reaction (HER) has always been an essential study direction of clean energy technology. In this...

Synthesis of hierarchical MoSe2 nanolayers on sodium sulfide crystals for electrocatalytic hydrogen evolution

CrystEngComm ◽  
2021 ◽  
Author(s):  
Xiaoshuang Chen ◽  
Meina Ju ◽  
Kun Song ◽  
Guoli Chen ◽  
Rui Yang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
High Performance ◽  
Sodium Sulfide ◽  
Hydrogen Generation ◽  
Clean Energy

Hydrogen generation via water electroreduction is a pivotal portion of exploiting clean-energy skills. Nevertheless, developing a low price and high-performance catalytic activity substance to take the place of expensively precious...

Ultrafast synthesis of molybdenum carbide nanoparticles for efficient hydrogen generation

2017 ◽  
Vol 5 (43) ◽  
pp. 22805-22812 ◽  
Author(s):  
Cuncai Lv ◽  
Zhipeng Huang ◽  
Qianpeng Yang ◽  
Guangfeng Wei ◽  
Zuofeng Chen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Carbon Coating ◽  
Molybdenum Carbide ◽  
Hydrogen Generation

A facile and ultrafast synthesis of molybdenum carbide coated with few-layer carbon (MoC/C) has been developed, and the effect of reducing the thickness of the carbon coating on its catalytic activity in the hydrogen evolution reaction (HER) has been demonstrated.

scholarly journals Fabrication of Robust Hydrogen Evolution Reaction Electrocatalyst Using Ag2Se by Vacuum Evaporation

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1460
Author(s):  
Sajjad Hussain ◽  
Jinwoong Chae ◽  
Kamran Akbar ◽  
Dhanasekaran Vikraman ◽  
Linh Truong ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
First Principles ◽  
Hydrogen Adsorption ◽  
Hydrogen Generation ◽  
Low Cost ◽  
First Principles Calculations ◽  
Electrochemical Surface Area ◽  
Complex Catalyst ◽  
Catalyst Synthesis

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.

Galvanostatically Deposited Ptni Thin-Films As Electrocatalytists for the Hydrogen Evolution Reaction

2020 ◽  
Vol MA2020-01 (37) ◽  
pp. 1535-1535
Author(s):  
Marcelo Videa ◽  
D. Alfonso Crespo-Yapur ◽  
Alejandra Medrano
Keyword(s):  
Thin Films ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction

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

Nanoscale ◽  
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.

Inserting Co and P into MoS2 photocathodes: enhancing hydrogen evolution reaction catalytic performance by activating edges and basal planes with sulfur vacancies

2020 ◽  
Vol 10 (20) ◽  
pp. 6902-6909
Author(s):  
Karthika Pichaimuthu ◽  
Anirudha Jena ◽  
Ho Chang ◽  
Chaochin Su ◽  
Ru-Shi Liu
Keyword(s):  
Solar Energy ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Clean Energy ◽  
Catalytic Performance ◽  
Effective Technique ◽  
Energy Needs ◽  
Production Of Hydrogen

The production of hydrogen using solar energy via a photoelectrochemical system is an effective technique for meeting present clean energy needs.

scholarly journals Enhanced Hydrogen Evolution Reaction in Surface Functionalized MoS2 Monolayers

Catalysts ◽  
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.

Energy-efficient electrolytic hydrogen generation using a Cu3P nanoarray as a bifunctional catalyst for hydrazine oxidation and water reduction

2017 ◽  
Vol 4 (3) ◽  
pp. 420-423 ◽  
Author(s):  
Meng Liu ◽  
Rong Zhang ◽  
Lixue Zhang ◽  
Danni Liu ◽  
Shuai Hao ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Energy Efficient ◽  
Oxidation Reaction ◽  
Hydrogen Generation ◽  
Bifunctional Catalyst ◽  
Water Reduction ◽  
Hydrazine Oxidation ◽  
Electrolytic Hydrogen

A Cu3P nanoarray acts as a durable bifunctional catalyst for hydrogen evolution reaction and hydrazine oxidation reaction with 100 mA cm−2at 0.72 V in 1.0 M KOH.

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