Hydrogen Production and Contaminants Removal Using Microbial Electrochemical Cells

2020 ◽  
pp. 177-189
Author(s):  
Rashmi Chandra ◽  
Claudia Camacho-Zuñiga
Keyword(s):  
Hydrogen Production ◽  
Electrochemical Cells ◽  
Contaminants Removal

scholarly journals Advanced oxygen-electrode-supported solid oxide electrochemical cells with Sr(Ti,Fe)O3−δ-based fuel electrodes for electricity generation and hydrogen production

2020 ◽  
Vol 8 (48) ◽  
pp. 25867-25879
Author(s):  
Shan-Lin Zhang ◽  
Hongqian Wang ◽  
Tianrang Yang ◽  
Matthew Y. Lu ◽  
Cheng-Xin Li ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Electricity Generation ◽  
High Performance ◽  
Oxygen Electrode ◽  
Solid Oxide ◽  
Electrochemical Cells ◽  
Catalytic Nanoparticles

Sr(Ti0.3Fe0.7)O3−δ (STF)-based fuel electrodes enhanced by the exsolution of catalytic nanoparticles were applied to the high-performance oxygen electrode-supported SOCs (OESCs).

Protonic ceramic electrochemical cells for hydrogen production and electricity generation: exceptional reversibility, stability, and demonstrated faradaic efficiency

2019 ◽  
Vol 12 (1) ◽  
pp. 206-215 ◽  
Author(s):  
Sihyuk Choi ◽  
Timothy C. Davenport ◽  
Sossina M. Haile
Keyword(s):  
Hydrogen Production ◽  
High Activity ◽  
Electricity Generation ◽  
Electrochemical Cell ◽  
Perovskite Oxide ◽  
Electrochemical Cells ◽  
Excellent Performance ◽  
Faradaic Efficiency ◽  
Air Electrode

We demonstrate excellent performance and durability at intermediate temperatures (500–650 °C) upon reversible operation of an electrochemical cell incorporating a proton-permeable, high-activity mixed conducting oxide as the air electrode, a highly proton-conductive and chemically stable perovskite oxide as the electrolyte, and a composite of Ni and the electrolyte as the fuel electrode.

scholarly journals Growth by Molecular Beam Epitaxy of GaNAs Alloys with High As Content for Potential Photoanode Applications in Hydrogen Production

2009 ◽  
Vol 1167 ◽  
Author(s):  
Sergey V Novikov ◽  
Chris R Staddon ◽  
Andrey V Akimov ◽  
Richard Campion ◽  
Norzaini Zainal ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Hydrogen Production ◽  
Band Gap ◽  
Molecular Beam ◽  
Energy Gap ◽  
Flux Ratio ◽  
Electrochemical Cells ◽  
Temperature Growth ◽  
Short Range Ordering ◽  
Band Anticrossing

AbstractWe have studied the low-temperature growth of GaNAs layers on sapphire substrates by plasma-assisted molecular beam epitaxy. We have succeeded in achieving GaN1-xAsx alloys over a large composition range by growing the films at temperature much below the normal GaN growth temperatures with increasing the As2 flux as well as Ga:N flux ratio. We found that the alloys with high As content x>0.1 are amorphous. Optical absorption measurements reveal a continuous gradual decrease of band gap from ˜3.4 eV to ˜1.4 eV with increasing As content. The energy gap reaches its minimum of ˜1.4 eV at the x˜0.6-0.7. For amorphous GaAsN alloys with x<0.3 the composition dependence of the band gap follows the prediction of the band anticrossing model developed for dilute alloys. This suggests that the amorphous GaN1-xAsx alloys have short-range ordering that resembles random crystalline GaN1-xAsx alloys. Such amorphous GaN1-xAsx alloys with tunable electronic structure may be useful as photoanodes in photo-electrochemical cells for hydrogen production.

Utilization of electrical charges in the pores of tofu waste for hydrogen production in water

2020 ◽  
pp. 124-135
Author(s):  
I. N. G. Wardana ◽  
N. Willy Satrio
Keyword(s):  
Magnetic Field ◽  
Hydrogen Production ◽  
Sodium Bicarbonate ◽  
Positive Charge ◽  
Electrical Energy ◽  
Hydrogen Sensor ◽  
Water Molecules ◽  
Partial Charge ◽  
Delocalized Electron ◽  
Water Hydrogen

Tofu is main food in Indonesia and its waste generally pollutes the waters. This study aims to change the waste into energy by utilizing the electric charge in the pores of tofu waste to produce hydrogen in water. The tofu pore is negatively charged and the surface surrounding the pore has a positive charge. The positive and negative electric charges stretch water molecules that have a partial charge. With the addition of a 12V electrical energy during electrolysis, water breaks down into hydrogen. The test was conducted on pre-treated tofu waste suspension using oxalic acid. The hydrogen concentration was measured by a MQ-8 hydrogen sensor. The result shows that the addition of turmeric together with sodium bicarbonate to tofu waste in water, hydrogen production increased more than four times. This is due to the fact that magnetic field generated by delocalized electron in aromatic ring in turmeric energizes all electrons in the pores of tofu waste, in the sodium bicarbonate, and in water that boosts hydrogen production. At the same time the stronger partial charge in natrium bicarbonate shields the hydrogen proton from strong attraction of tofu pores. These two combined effect are very powerful for larger hydrogen production in water by tofu waste.

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