Hydrogen Storage on Graphene Sheet: Physisorption, Diffusion and Chemisorbed Pathways by First Principles Calculations / Magazynowanie Wodoru Na Arkuszu Grafenu: Analiza Ścieżek Fizykosorpcji, Dyfuzji I Chemisorpcji Metodą Obliczeń Ab Initio

2012 ◽  
Vol 57 (4) ◽  
pp. 1075-1080 ◽  
Author(s):  
F. Costanzo ◽  
P.L. Silvestrelli ◽  
F. Ancilotto
Keyword(s):  
Hydrogen Storage ◽  
Graphene Sheet ◽  
Large Scale ◽  
Van Der Waals ◽  
Clean Energy ◽  
Hydrogen Energy ◽  
Hydrogen Atoms ◽  
First Principle Calculation ◽  
Wannier Functions ◽  
Clean Energy Source

Hydrogen is frequently touted as the “fuel of the future” because of its huge potential as clean energy source, although the large-scale adoption of this technology has yet to be realized. One of the remaining barriers to the utilization of hydrogen energy is an efficient and inexpensive means of hydrogen storage. In this work we investigate the nature of this process by first principle calculation. In particular, we study the way in which the H2 molecule can interact with graphene sheet through physisorption and chemisorption mechanism. The first mechanism involves the condensation of the hydrogen molecule on the graphene as a result of weak van der Waals forces, while the chemisorption mechanism involves the preliminary dissociation of the H2 molecule and the subsequent reaction of hydrogen atoms with the unsatured C-C bonds to form C-H bonds. To study carefully the possible physisorbed configurations on the graphene sheet, we take in to account van der Waals (vdW) interactions in DFT using the new method (DFT/vdW-WF) recently developed in our group and based on the concept of maximally localized Wannier functions. There are three possible way in which the H2 molecule can adapt to the structure of graphene: the hollow, the bridge and the top site called H, B and T configurations, respectively. We find the hollow site to be most stable physisorbed state with a binding energy of -50 meV. This value, in agreement with experimental results, is also compared with other vdW-correction methods as described in the following paper. Diffusion of the physisorbed configurations on the graphene sheet and activated reaction pathways in which the molecule starts from a physisorbed configuration to end up in a chemisorbed configurations have also been studied.

Subsea Liquid Energy Storage – The Bridge Between Oil and Energy/Hydrogen

2021 ◽  
Author(s):  
Kristian Mikalsen
Keyword(s):  
Energy Storage ◽  
Large Scale ◽  
Modular Design ◽  
Clean Energy ◽  
Building Blocks ◽  
Economic Benefits ◽  
Hydrogen Energy ◽  
Novel Technologies ◽  
System Solution ◽  
Ammonia Storage

Abstract This paper demonstrates a pioneering technology adaption for using a membrane-based subsea storage solution for oil/condensate, modified into storing clean energy storage in the form of ammonia (as a hydrogen energy carrier). The immediate application will provide an economical alternative to electrification of offshore platforms, instead of using expensive cables from shore. Storing ammonia at the seabed using innovative subsea storage technologies will dramatically reduce CO2 emissions for offshore assets. The fluid will be stored in a safe manner on the seafloor, protecting both personnel and marine life. The next step will be to include subsea ammonia storage as part of the global logistical value chain, which can power the merchant shipping fleet. Clean ammonia can be produced using renewable resources as wind or solar. It focuses on bridging the ongoing oil/condensate storage qualification, adapted into storing ammonia. The large-scale verification test scope is explained, and we show how the test is extended to also prove the concept of safe energy/ammonia storage. The ammonia storage concept is explained, and we show how this can be included as part of a low carbon future. The focus is the immediate market for providing clean power to existing or new offshore assets. The full system solution will encompass storage tanks placed nearby the platforms at safe water depths, riser systems providing fuel to the ammonia power generators, and the tank filling systems. Bridging and adapting technologies from the petroleum industry into renewables shows the importance of utilizing the technology developments and competence of the oil and gas business. The technical evaluations have shown that the oil/condensate storage can be adapted into storing energy/ammonia with minor modifications. Converting hydrogen into ammonia gives slight energy losses, but it is defended by the large economic benefits of storing ammonia versus pressure storage of hydrogen. The paper presents qualification work already completed and how to implement ammonia fuel storage for platforms. In addition, we show the test setup for a large-scale qualification provided by an original equipment manufacturer (OEM) company together with major Operators. Innovative modular design methods have shown that the concept can be included on existing offshore assets, which have limited topside space available. Adding green or blue ammonia as an alternative to power cables from shore have several benefits, and many of the connecting building blocks are falling into place. The main conclusion is how to adapt Novel technologies from the oil industry to store ammonia in a safe way on the seafloor.

scholarly journals Methane and Hydrogen Storage in Metal Organic Frameworks: A Mini Review

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Oghenegare Emmanuel Eyankware ◽  
Idaeresoari Harriet Ateke
Keyword(s):  
Hydrogen Storage ◽  
Environmental Sustainability ◽  
Hydrogen Adsorption ◽  
Metal Organic Framework ◽  
Clean Energy ◽  
United States Department ◽  
High Performing ◽  
Metal Organic ◽  
Improved Performance ◽  
Clean Energy Source

The need for a net zero carbon emission future is imperative for environmental sustainability hence, intensive carbon fuels would need to be replaced with less carbon emitting energy sources such as natural gas till clean energy source such as hydrogen becomes commercialized. As a result, this mini review discusses the use of metal organic framework (MOF) for adsorption of methane and hydrogen in specially designed tanks for improved performance so as to increase their applicability. Herein, adsorption (delivery) capacity of selected high performing MOFs for methane and hydrogen storage were highlighted in reference to the targets set by United States Department of Energy’s Advanced Research Projects Agency-Energy (ARPA-E) and Fuel Cells Technology Office. In this regard, specific design and chemistry of MOFs for improved methane and hydrogen adsorption were highlighted accordingly. In addition, an overview of computational and molecular studies of hypothetical MOFs was done – the various approaches used and their proficiency for construction of specific of crystalline structures and topologies were herewith discussed.

Hydrogen Energy Harvesting through nanomaterials under Solar Light Irradiation

2019 ◽  
Vol 03 ◽  
Author(s):  
N. R. Khalid ◽  
Muhammad Faheem Malik ◽  
Ho Soon Min ◽  
Sedigheh Abbasi
Keyword(s):  
Continuous Production ◽  
Clean Energy ◽  
Cell System ◽  
Semiconductor Material ◽  
Solar Light ◽  
Hydrogen Energy ◽  
Hybrid Device ◽  
Production Of Hydrogen ◽  
Main Motive ◽  
Clean Energy Source

In this review, the evolution of hydrogen in combined cell system of Photoelectrocatalytic and microbial fuel disused. Hydrogen is used as chemical fuel. Hydrogen is being produced through Photoelectrocatalytic method. The semiconductor material put into the water and irradiated with solar light after which the hydrogen produced by different steps and accumulated. Production of hydrogen also occur in microbial fuel cell system. These are electrochemical devices that initially used to treat the wastewater. But now this cell has entered into very interesting field of research which is Bioelectrochemical (BES). BES produces hydrogen using biomass as a catalyst using small consumption voltage rather than simple electrolysis of water. The first sections explain how hydrogen is produced individually by these two methods. And then we make comprehensive review on the evolution of hydrogen by combined microbial fuel and photoelectrocatalytic cell system, which is our main motive of writing this article. The continuous production of hydrogen by (PEC-MFC) hybrid device, using sunlight and splitting of water and electrohydrogenesis of microbial cell in fusion device (PEC-MFC) were also reported. This method gives continuous production of hydrogen using wastewater under solar light and also gives the treatment of wastewater. It is the clean energy source and also fulfills the today’s demand of energy. At last, a review on production of hydrogen by microbial photoelectrochemical system which is constructed by photocathode of semiconductor material and an anode of microbial. Production of hydrogen was continuously achieved without external voltage under ultraviolet irradiation.

Mechanism of highly enhanced hydrogen storage by two-dimensional 1T′ MoS2

2020 ◽  
Vol 22 (2) ◽  
pp. 430-436
Author(s):  
Junyu Chen ◽  
Jiamu Cao ◽  
Jing Zhou ◽  
Yufeng Zhang ◽  
Mingxue Li ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
High Efficiency ◽  
Clean Energy ◽  
Hydrogen Energy ◽  
Two Dimensional

Hydrogen energy is a high-efficiency and clean energy, but the problem of storage still prevents its extensive use.

A simulation study on the hydrogen storage properties of fullerene family molecules Cx(x = 56,60,70) and their hydrides

2016 ◽  
Vol 30 (22) ◽  
pp. 1650303
Author(s):  
Wei Dai ◽  
Ming Xiao ◽  
Mu-Qing Chen ◽  
Jia-Jing Xu ◽  
Yong-Jian Tang
Keyword(s):  
Hydrogen Storage ◽  
Energy Barrier ◽  
Hydrogen Adsorption ◽  
High Energy ◽  
Hydrogen Energy ◽  
Carbon Cage ◽  
First Principle Calculation ◽  
Hydrogen Storage Properties ◽  
Hydrogen Molecules ◽  
Storage Properties

Hydrogen storage is a key factor for the application of hydrogen energy. From first principle calculation, we have acquired the energy barrier for hydrogen molecules to pass through the hexagonal rings and pentagonal rings of the fullerene. Then the absorption energy and energy barrier are used to analyze the hydrogen adsorption capacity of the fullerene family and their hydrides. We have also studied the hydrogen storage properties of the fullerene family and their hydrides by grand canonical Monte Carlo method. It is found that the weight density of hydrogen storage at ambient temperature and pressure can reach 7.71 wt.%. The results show that it is difficult for hydrogen to get into the carbon cage of the fullerene because of the high energy barrier, while it is beneficial to destroy the fullerene structure for the processes of absorption and desorption. Meanwhile, fullerene hydrogenation is an effective method to improve the hydrogen storage properties. Our study facilitates the design and synthesis of hydrogen storage materials, and provides theoretical support to improve the hydrogen storage capability for materials.

scholarly journals Construction of Ni-Mo-P heterostructures with efficient hydrogen evolution performance under acidic condition

2021 ◽  
Author(s):  
Tian-Yun Chen ◽  
Ya-Qi Zhang ◽  
Ying-Yan Fu ◽  
Min Qian ◽  
Hao-Jiang Dai ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Hydrogen Evolution ◽  
Current Density ◽  
Photoelectron Spectroscopy ◽  
Large Scale ◽  
Clean Energy ◽  
Hydrogen Energy ◽  
Durability Test ◽  
X Ray ◽  
Onset Potential

Abstract Hydrogen energy is regarded as one of the most important clean energy in the 21st century, and improving the catalytic efficiency of hydrogen evolution reaction (HER) is the basis for realizing the large-scale hydrogen production. Transition metal phosphides (TMPs) were proved to be efficient electrocatalysts for HER. In this work, we first synthesized the nickel-molybdenum bimetallic precursors, followed by high-temperature calcination in air. Finally, NiMoP/MoP nanorods (Ni-Mo-P NRs) was obtained by chemical vapor deposition (CVD) of phosphating. The target catalyst of Ni-Mo-P NRs was characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). For Ni-Mo-P NRs, the electrochemical test in 0.5 M H2SO4 solution for HER showed that the optimal feeding ratio was Ni: Mo = 1:1. And the Ni1-Mo1-P NRs presented an onset potential of 63.2 mV, and an overpotential of 117.9 mV was required to drive the current density of 10 mA↔cm− 2. Meanwhile, The Tafel slope, exchange current density (j0), electrochemical double-layer capacitance (Cdl) were 58.6 mV↔dec− 1, 0.10 mA↔cm− 2, 12.6 mF↔cm− 2, respectively. Moreover, there was no obvious activity diminish of Ni1-Mo1-P NRs after a long-term stability and durability test.

scholarly journals Current Research Trends and Perspectives on Solid-State Nanomaterials in Hydrogen Storage

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-39
Author(s):  
Jie Zheng ◽  
Chen-Gang Wang ◽  
Hui Zhou ◽  
Enyi Ye ◽  
Jianwei Xu ◽  
...  
Keyword(s):  
Solid State ◽  
Hydrogen Storage ◽  
Large Scale ◽  
Cost Effective ◽  
Pure Hydrogen ◽  
Hydrogen Energy ◽  
Practical Applications ◽  
Main Challenge ◽  
Porous Aromatic Frameworks ◽  
Storage Technologies

Hydrogen energy, with environment amicable, renewable, efficiency, and cost-effective advantages, is the future mainstream substitution of fossil-based fuel. However, the extremely low volumetric density gives rise to the main challenge in hydrogen storage, and therefore, exploring effective storage techniques is key hurdles that need to be crossed to accomplish the sustainable hydrogen economy. Hydrogen physically or chemically stored into nanomaterials in the solid-state is a desirable prospect for effective large-scale hydrogen storage, which has exhibited great potentials for applications in both reversible onboard storage and regenerable off-board storage applications. Its attractive points include safe, compact, light, reversibility, and efficiently produce sufficient pure hydrogen fuel under the mild condition. This review comprehensively gathers the state-of-art solid-state hydrogen storage technologies using nanostructured materials, involving nanoporous carbon materials, metal-organic frameworks, covalent organic frameworks, porous aromatic frameworks, nanoporous organic polymers, and nanoscale hydrides. It describes significant advances achieved so far, and main barriers need to be surmounted to approach practical applications, as well as offers a perspective for sustainable energy research.

Light Weight Design of Multi-Layered Steel Vessels for High-Pressure Hydrogen Storage

2019 ◽  
Author(s):  
Sheng Ye ◽  
Jinyang Zheng ◽  
Ting Yu ◽  
Chaohua Gu ◽  
Zhengli Hua
Keyword(s):  
High Pressure ◽  
Hydrogen Storage ◽  
Safety Factor ◽  
Large Scale ◽  
Low Cost ◽  
Basic Structure ◽  
Hydrogen Energy ◽  
Light Weight ◽  
Weight Design ◽  
Pressure Hydrogen

Abstract Large scale storage of hydrogen is one of the key factors in hydrogen energy development. High-pressure hydrogen storage technology is widely used in hydrogen storage. It has advantages of easy operating, quick charge and discharge, simple equipment structure and low cost. The multi-layered steel vessel (MLSV) was developed for stationary hydrogen storage, which was flexible in design, safe in operation and convenient in fabrication. MLSV has been used in several hydrogen refueling stations in China. With the construction of hydrogen refueling stations accelerated, the vessel was required to be larger, lighter and cheaper. First, the basic structure of the MLSV was presented. Second, two light-weight methods were proposed and compared, including reducing the safety factor and increasing the strength of the steel band. Finally, the stress in the cylindrical shell of the MLSV using light-weight design were compared with the previous one. In addition, a MLSV using the light-weight method of reducing safety factor has been designed and fabricated, which can store 211 kg gaseous hydrogen at 50MPa.

scholarly journals Hydrogen as a Clean Energy Source

2021 ◽  
Author(s):  
Vikram Rama Uttam Pandit
Keyword(s):  
Energy Source ◽  
Hydrogen Production ◽  
Large Scale ◽  
Fossil Fuels ◽  
Hydrogen Generation ◽  
Clean Energy ◽  
Green Energy ◽  
Main Challenge ◽  
Clean Energy Source ◽  
Energy Challenge

Sustainable development of the world is mainly dependent on the use of present energy resources, which primarily includes water, wind, solar, geothermal, and nuclear power. Hydrogen as a clean and green energy source can be the resolution of the energy challenge and may satisfy the demands of several upcoming generations. Hydrogen when used it does not produce any type of pollutant and this makes it a best candidate as a clean energy. Hydrogen energy can be generated from natural gas, oil, biomass, and fossil fuels using thermochemical, photocatalytic, microbiological and electrolysis processes. Large scale hydrogen production is also testified up to some extent with proper engineering for multi applications. Alas, storage and transportation of hydrogen are the main challenge amongst scientific community. Photocatalytic hydrogen production with good efficiencies and amount is well discussed. Till date, using a variety of metal oxide-sulfide, carbon-based materials, metal organic frameworks are utilized by doping or with their composites for enhance the hydrogen production. Main intents of this chapter are to introduce all the possible areas of hydrogen applications and main difficulties of hydrogen transportation, storage and achievements in the hydrogen generation with its applications.

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