scholarly journals [NiFe]-(Oxy)Sulfides Derived from NiFe2O4 for the Alkaline Hydrogen Evolution Reaction

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 543
Author(s):  
David Tetzlaff ◽  
Vasanth Alagarasan ◽  
Christopher Simon ◽  
Daniel Siegmund ◽  
Kai junge Puring ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Hydrogen Generation ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Precise Control ◽  
Metal Free ◽  
Synthetic Procedure ◽  
Key Factor ◽  
Increased Activity

The development of noble-metal-free electrocatalysts is regarded as a key factor for realizing industrial-scale hydrogen production powered by renewable energy sources. Inspired by nature, which uses Fe- and Ni-containing enzymes for efficient hydrogen generation, Fe/Ni-containing chalcogenides, such as oxides and sulfides, received increasing attention as promising electrocatalysts to produce hydrogen. We herein present a novel synthetic procedure for mixed Fe/Ni (oxy)sulfide materials by the controlled (partial) sulfidation of NiFe2O4 (NFO) nanoparticles in H2S-containing atmospheres. The variation in H2S concentration and the temperature allows for a precise control of stoichiometry and phase composition. The obtained sulfidized materials (NFS) catalyze the hydrogen evolution reaction (HER) with increased activity in comparison to NFO, up to −10 and −100 mA cm−2 at an overpotential of approx. 250 and 450 mV, respectively.

scholarly journals Enhanced electrocatalytic hydrogen generation from water via cobalt-doped Cu2ZnSnS4 nanoparticles

RSC Advances ◽  
2018 ◽  
Vol 8 (36) ◽  
pp. 20341-20346 ◽  
Author(s):  
Renuka V. Digraskar ◽  
Vijay S. Sapner ◽  
Shankar S. Narwade ◽  
Shivsharan M. Mali ◽  
Anil V. Ghule ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Noble Metal ◽  
Hydrogen Evolution Reaction ◽  
Hydrogen Generation ◽  
Sonochemical Method ◽  
Metal Free ◽  
Co Doped

A novel noble metal-free Co-doped CZTS-based nano-electrocatalyst fabricated by employing a sonochemical method for the enhanced hydrogen evolution reaction (HER) and it shows a superior HER performance and exhibits excellent current stability.

P- or S-Doped Graphdiyne as a Superior Metal-Free Electrocatalyst for Hydrogen Evolution Reaction: A Computational Study

2021 ◽  
Author(s):  
Siyao Wang ◽  
Dongxu Jiao ◽  
Jingwei Liu ◽  
Jing-Xiang Zhao ◽  
Yongchen Shang
Keyword(s):  
Density Functional Theory ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Density Functional ◽  
Hydrogen Generation ◽  
Computational Study ◽  
Functional Theory ◽  
Metal Free ◽  
Dft Computations

Searching for stable, efficient, and inexpensive metal-free electrocatalysts for hydrogen evolution reaction (HER) is crucial for sustainable hydrogen generation. Herein, by means of density functional theory (DFT) computations, we proposed...

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

2019 ◽  
Vol 3 (9) ◽  
pp. 2205-2210 ◽  
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.

scholarly journals Graphene-Based Catalysts for Hydrogen Evolution Reaction

2019 ◽  
Author(s):  
Lana Regent ◽  
Maximina Luis-Sunga ◽  
Elena Pastor ◽  
Gonzalo García
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Large Scale ◽  
Recent Progress ◽  
Renewable Energy Sources ◽  
Cost Effective ◽  
Clean Energy ◽  
Energy Sources ◽  
Mass Energy ◽  
The Past

Developing sustainable and renewable energy sources is critical as higher and higher global energy and environmental challenges arise. Hydrogen has the highest mass/energy density of any fuel and is considered one of the best sources of clean energy. Water splitting is regarded as one of the most promising solutions for hydrogen production on a large scale. Highly efficient, durable and cost-effective catalysts for hydrogen evolution reaction (HER) are critical in the realization of this goal. Among many materials proposed, graphene-based materials offer some unique properties for HER catalysis. In this review, we present recent progress on development of graphene-based electrocatalysts toward HER throughout the past few years.

scholarly journals Recent Advancements in Technical Design and Thermal Performance Enhancement of Solar Greenhouse Dryers

2021 ◽  
Vol 13 (13) ◽  
pp. 7025
Author(s):  
Shiva Gorjian ◽  
Behnam Hosseingholilou ◽  
Laxmikant D. Jathar ◽  
Haniyeh Samadi ◽  
Samiran Samanta ◽  
...  
Keyword(s):  
Thermal Performance ◽  
Fossil Fuels ◽  
Performance Enhancement ◽  
Renewable Energy Sources ◽  
Ghg Emissions ◽  
Heat Pumps ◽  
Energy Sources ◽  
Key Factor ◽  
Hybrid Configuration ◽  
Vegetables And Fruits

The food industry is responsible for supplying the food demand of the ever-increasing global population. The food chain is one of the major contributors to greenhouse gas (GHG) emissions, and global food waste accounts for one-third of produced food. A solution to this problem is preserving crops, vegetables, and fruits with the help of an ancient method of sun drying. For drying agricultural and marine products, several types of dryers are also being developed. However, they require a large amount of energy supplied conventionally from pollutant energy sources. The environmental concerns and depletion risks of fossil fuels persuade researchers and developers to seek alternative solutions. To perform drying applications, sustainable solar power may be effective because it is highly accessible in most regions of the world. Greenhouse dryers (GHDs) are simple facilities that can provide large capacities for drying agricultural products. This study reviews the integration of GHDs with different solar technologies, including photovoltaic (PV), photovoltaic-thermal (PVT), and solar thermal collectors. Additionally, the integration of solar-assisted greenhouse dryers (SGHDs) with heat pumps and thermal energy storage (TES) units, as well as their hybrid configuration considering integration with other renewable energy sources, is investigated to improve their thermal performance. In this regard, this review presents and discusses the most recent advances in this field. Additionally, the economic analysis of SGHDs is presented as a key factor to make these sustainable facilities commercially available.

Hydrogen evolution reaction highly electrocatalyzed by MWCNT/N-octylpyridinum hexafluorophosphate metal-free system

2021 ◽  
Vol 372 ◽  
pp. 137859
Author(s):  
Leyla Gidi ◽  
Roxana Arce ◽  
José Ibarra ◽  
M. Isaacs ◽  
M.J. Aguirre ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Free System ◽  
Metal Free

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.

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