Seawater Electrolysis for Hydrogen Production: A Solution Looking for a Problem?

2021 ◽  
Author(s):  
M. A. Khan ◽  
Tareq Al-Attas ◽  
Soumyabrata Roy ◽  
Muhammad M. Rahman ◽  
Noreddine Ghaffour ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Energy Systems ◽  
Water Electrolysis ◽  
H2 Production ◽  
Renewable Electricity ◽  
Seawater Electrolysis

As the price of renewable electricity continues to plummet, hydrogen (H2) production via water electrolysis is gaining momentum globally as a route to decarbonize our energy systems. The requirement of...

scholarly journals Seawater Electrolysis for Hydrogen Production: A Solution Looking for a Problem?

2021 ◽  
Author(s):  
Md Kibria ◽  
Mohd Adnan Khan ◽  
Tareq A. Al-Attas ◽  
Soumyabrata Roy ◽  
M.M. Rahman ◽  
...  
Keyword(s):  
Proton Exchange Membrane ◽  
Sea Water ◽  
Energy Systems ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Significant Research ◽  
Widespread Availability ◽  
Research Investments ◽  
Exchange Membrane ◽  
Seawater Electrolysis

As the price of renewable electricity continues to plummet, hydrogen (H<sub>2</sub>) production via water electrolysis is gaining momentum globally as a route to decarbonize our energy systems. The requirement of high purity water for electrolysis as well as the widespread availability of seawater have led significant research efforts in developing direct seawater electrolysis technology for H<sub>2</sub> production. In this Perspective, we critically assess the broad-brush arguments on the research and development (R&D) needs for direct seawater electrolysis from energy, cost and environmental aspects. We focus in particular on a process consisting of sea water reverse osmosis (SWRO) coupled to proton exchange membrane (PEM) electrolysis. Our analysis reveals there are limited economic and environmental incentives of pursuing R&D on today’s nascent direct seawater electrolysis technology. As commercial water electrolysis requires significant amount of energy compared to SWRO, the capital and operating costs of SWRO are found to be negligible. This leads to an insignificant increase in levelized cost of H<sub>2</sub> (<0.1 $/kg H<sub>2</sub>) and CO<sub>2</sub> emissions (<0.1%) from a SWRO-PEM coupled process. Our analysis poses the questions: what is the future promise of direct seawater electrolysis? With an urgent need to decarbonize our energy systems, should we consider realigning our research investments? We conclude with a forward-looking perspective on future R&D priorities in desalination and electrolysis technologies.

Efficient hydrogen production by saline water electrolysis at high current densities without the interfering chlorine evolution

2021 ◽  
Author(s):  
Zhipeng Yu ◽  
Junyuan Xu ◽  
Li-jian Meng ◽  
Lifeng Liu
Keyword(s):  
Hydrogen Production ◽  
Saline Water ◽  
Renewable Energy Sources ◽  
Water Electrolysis ◽  
Cost Effective ◽  
High Current ◽  
Chlorine Evolution ◽  
Cost Effective Approach ◽  
Current Densities ◽  
Seawater Electrolysis

Seawater electrolysis powered by renewable energy sources has been proposed to be a potentially cost-effective approach to green hydrogen production. However, the long-standing issue regarding the chlorine evolution reaction (CER)...

Interfacial nickel nitride/sulfide as a bifunctional electrode for highly efficient overall water/seawater electrolysis

2019 ◽  
Vol 7 (14) ◽  
pp. 8117-8121 ◽  
Author(s):  
Yongqiang Zhao ◽  
Bo Jin ◽  
Anthony Vasileff ◽  
Yan Jiao ◽  
Shi-Zhang Qiao
Keyword(s):  
Hydrogen Production ◽  
Water Electrolysis ◽  
Highly Efficient ◽  
Highly Active ◽  
Bifunctional Electrocatalysts ◽  
Nickel Nitride ◽  
Seawater Electrolysis

Simple methods for fabricating highly active and stable interfacial bifunctional electrocatalysts for water electrolysis are essential for hydrogen production.

FeS2-anchored transition metal single atoms for high-efficient overall water splitting: A DFT computational screening study

2021 ◽  
Author(s):  
Yingju Yang ◽  
Jing Liu ◽  
Feng Liu ◽  
Zhen Wang ◽  
Dawei Wu
Keyword(s):  
Hydrogen Production ◽  
Rational Design ◽  
Water Electrolysis ◽  
Energy Crisis ◽  
Human Society ◽  
Renewable Electricity ◽  
Single Atoms ◽  
Computational Screening ◽  
High Efficient ◽  
Screening Study

Hydrogen production from water electrolysis using the renewable electricity is widely regarded as a highly promising route to solve the energy crisis of human society. However, the rational design of...

scholarly journals Energy-saving hydrogen production by chlorine-free hybrid seawater splitting coupling hydrazine degradation

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Fu Sun ◽  
Jingshan Qin ◽  
Zhiyu Wang ◽  
Mengzhou Yu ◽  
Xianhong Wu ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Low Voltage ◽  
Neutral Hydrogen ◽  
Water Electrolysis ◽  
High Energy ◽  
Hydrogen Energy ◽  
Scale Production ◽  
Alkaline Water Electrolysis ◽  
Self Powered ◽  
Seawater Electrolysis

AbstractSeawater electrolysis represents a potential solution to grid-scale production of carbon-neutral hydrogen energy without reliance on freshwater. However, it is challenged by high energy costs and detrimental chlorine chemistry in complex chemical environments. Here we demonstrate chlorine-free hydrogen production by hybrid seawater splitting coupling hydrazine degradation. It yields hydrogen at a rate of 9.2 mol h–1 gcat–1 on NiCo/MXene-based electrodes with a low electricity expense of 2.75 kWh per m3 H2 at 500 mA cm–2 and 48% lower energy equivalent input relative to commercial alkaline water electrolysis. Chlorine electrochemistry is avoided by low cell voltages without anode protection regardless Cl– crossover. This electrolyzer meanwhile enables fast hydrazine degradation to ~3 ppb residual. Self-powered hybrid seawater electrolysis is realized by integrating low-voltage direct hydrazine fuel cells or solar cells. These findings enable further opportunities for efficient conversion of ocean resources to hydrogen fuel while removing harmful pollutants.

HYDROGEN PRODUCTION VIA CATALYST OF GREEN LASER, MOLYBDENUM AND ETHANOL

2016 ◽  
Vol 78 (3) ◽  
Author(s):  
Siti Radhiana Azni ◽  
Mohamad Aizat Abu Bakar ◽  
Daing Hanum Farhana ◽  
Siti Noraiza Ab Razak ◽  
Noriah Bidin
Keyword(s):  
Hydrogen Production ◽  
Water Electrolysis ◽  
H2 Production ◽  
Green Laser ◽  
Electrochemical Process ◽  
Green Technology ◽  
Electrical Field ◽  
Diode Pumped ◽  
Electrical Field Effect ◽  
532 Nm

Electrolysis is an electrochemical process which is known as a green technology. Laser irradiation and the presence of catalyst in water electrolysis are identified as ways of improving the efficiency and increment of hydrogen production.  The enhancement of hydrogen production through water electrolysis is obtained by adding molybdenum to increase the current in electrochemical cell and ethanol as an agent in photochemical reaction. In addition, diode pumped solid-state laser green laser at 532 nm is employed with the purpose to compensate the residual electrical field effect. The combination of the three catalysts is found more powerful to cause water splitting, thus produced 5 times greater H2 production in comparison to the action of individual catalyst.  

scholarly journals Seawater Electrolysis for Hydrogen Production: A Solution Looking for a Problem?

2021 ◽  
Author(s):  
Md Kibria ◽  
Mohd Adnan Khan ◽  
Tareq A. Al-Attas ◽  
Soumyabrata Roy ◽  
M.M. Rahman ◽  
...  
Keyword(s):  
Proton Exchange Membrane ◽  
Sea Water ◽  
Energy Systems ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Significant Research ◽  
Widespread Availability ◽  
Research Investments ◽  
Exchange Membrane ◽  
Seawater Electrolysis

As the price of renewable electricity continues to plummet, hydrogen (H<sub>2</sub>) production via water electrolysis is gaining momentum globally as a route to decarbonize our energy systems. The requirement of high purity water for electrolysis as well as the widespread availability of seawater have led significant research efforts in developing direct seawater electrolysis technology for H<sub>2</sub> production. In this Perspective, we critically assess the broad-brush arguments on the research and development (R&D) needs for direct seawater electrolysis from energy, cost and environmental aspects. We focus in particular on a process consisting of sea water reverse osmosis (SWRO) coupled to proton exchange membrane (PEM) electrolysis. Our analysis reveals there are limited economic and environmental incentives of pursuing R&D on today’s nascent direct seawater electrolysis technology. As commercial water electrolysis requires significant amount of energy compared to SWRO, the capital and operating costs of SWRO are found to be negligible. This leads to an insignificant increase in levelized cost of H<sub>2</sub> (<0.1 $/kg H<sub>2</sub>) and CO<sub>2</sub> emissions (<0.1%) from a SWRO-PEM coupled process. Our analysis poses the questions: what is the future promise of direct seawater electrolysis? With an urgent need to decarbonize our energy systems, should we consider realigning our research investments? We conclude with a forward-looking perspective on future R&D priorities in desalination and electrolysis technologies.

scholarly journals Adding the activated carbon of rice husk to increase hydrogen production on water electrolysis

2021 ◽  
Vol 1034 (1) ◽  
pp. 012075
Author(s):  
Purnami ◽  
ING. Wardana ◽  
Sudjito ◽  
Denny Widhiyanuriyawan ◽  
Nurkholis Hamidi
Keyword(s):  
Activated Carbon ◽  
Hydrogen Production ◽  
Rice Husk ◽  
Water Electrolysis

scholarly journals Catalytic Conversion of n-C7 Asphaltenes and Resins II into Hydrogen Using CeO2-Based Nanocatalysts

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1301
Author(s):  
Oscar E. Medina ◽  
Jaime Gallego ◽  
Sócrates Acevedo ◽  
Masoud Riazi ◽  
Raúl Ocampo-Pérez ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Low Temperatures ◽  
Gaseous Mixture ◽  
H2 Production ◽  
The Other ◽  
Hydrogen Release ◽  
Catalytic Gasification ◽  
Three Samples ◽  
Main Decomposition ◽  
Catalytic Capacity

This study focuses on evaluating the volumetric hydrogen content in the gaseous mixture released from the steam catalytic gasification of n-C7 asphaltenes and resins II at low temperatures (<230 °C). For this purpose, four nanocatalysts were selected: CeO2, CeO2 functionalized with Ni-Pd, Fe-Pd, and Co-Pd. The catalytic capacity was measured by non-isothermal (from 100 to 600 °C) and isothermal (220 °C) thermogravimetric analyses. The samples show the main decomposition peak between 200 and 230 °C for bi-elemental nanocatalysts and 300 °C for the CeO2 support, leading to reductions up to 50% in comparison with the samples in the absence of nanoparticles. At 220 °C, the conversion of both fractions increases in the order CeO2 < Fe-Pd < Co-Pd < Ni-Pd. Hydrogen release was quantified for the isothermal tests. The hydrogen production agrees with each material’s catalytic activity for decomposing both fractions at the evaluated conditions. CeNi1Pd1 showed the highest performance among the other three samples and led to the highest hydrogen production in the effluent gas with values of ~44 vol%. When the samples were heated at higher temperatures (i.e., 230 °C), H2 production increased up to 55 vol% during catalyzed n-C7 asphaltene and resin conversion, indicating an increase of up to 70% in comparison with the non-catalyzed systems at the same temperature conditions.

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