scholarly journals Electrical Double Layer Mechanism Analysis of PEM Water Electrolysis for Frequency Limitation of Pulsed Currents

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7822
Author(s):  
Jae-Hoon Kim ◽  
Chang-Yeol Oh ◽  
Ki-Ryong Kim ◽  
Jong-Pil Lee ◽  
Tae-Jin Kim
Keyword(s):  
Environmental Variables ◽  
Proton Exchange Membrane ◽  
Hydrogen Generation ◽  
Pulse Current ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Mechanism Analysis ◽  
Operating Characteristics ◽  
Factors Affecting ◽  
Limit Value

This paper proposes a method for improving hydrogen generation using pulse current in a proton exchange membrane-type electrolyzer (PEMEL). Traditional methods of electrolysis using direct current are known as the simplest approach to produce hydrogen. However, it is highly dependent on environmental variables, such as the temperature and catalyst used, to enhance the rate of electrolysis. Therefore, we propose electrolysis using a pulse current that can apply several dependent variables rather than environmental variables. The proposed method overcomes the difficulties in selecting the frequency of the pulse current by deriving factors affecting hydrogen generation while changing the concentration generated by the cell interface during the pulsed water-electrolysis process. The correlation between the electrolyzer load and the frequency characteristics was analyzed, and the limit value of the applicable frequency of the pulse current was derived through electrical modeling. In addition, the operating characteristics of PEMEL could be predicted, and the PEMEL using the proposed pulse current was verified through experiments.

Applications of two dimensional material-MXene for proton exchange membrane fuel cells (PEMFCs) and water electrolysis

2020 ◽  
Vol 16 ◽  
Author(s):  
Chanchan Fan ◽  
Peng Zhang ◽  
Ranran Wang ◽  
Yezhu Xu ◽  
Xingrui Sun ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Water Splitting ◽  
Proton Exchange Membrane ◽  
Layer Structure ◽  
Metal Layer ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Two Dimensional ◽  
Max Phases ◽  
Early Transition Metal

: A new kind of two-dimensional (2D) materials MXene (early transition metal carbides, nitrides and carbonitrides) is obtained by selective etching the A element from the MAX phases. MXene exhibits both the metallic conductivity and the hydrophilic nature due to its metal layer structure and hydroxyl or oxygen terminated surfaces. This review provides an overview of the MXene used in the electrolytes and electrodes for the fuel cells and water splitting. MXene with functional groups termination could construct ion channels that significantly benefits to the ion conductivity through the electrolyte. The metal supported by MXene interaction offers electronic, compositional, and geometric effects that could enhance the catalytic activity and stability. MXene have already shown promising performance for fuel cells and water electrolysis. Herein, the etching and intercalation methods of MXene in recent years are summarized. The applications of MXene for fuel cells electrolyte, catalyst and water splitting catalyst are revealed to provide more brief idea for MXene used as new energy materials.

scholarly journals On the Effect of Anion Exchange Ionomer Binders in Bipolar Electrode Membrane Interface Water Electrolysis

2021 ◽  
Author(s):  
Britta Mayerhöfer ◽  
Konrad Ehelebe ◽  
Florian Dominik Speck ◽  
Markus Bierling ◽  
Johannes Bender ◽  
...  
Keyword(s):  
Proton Exchange Membrane ◽  
Water Electrolysis ◽  
Membrane Electrode Assembly ◽  
Proton Exchange ◽  
Membrane Electrode ◽  
Bipolar Electrode ◽  
Electrode Interface ◽  
Exchange Membrane ◽  
Electrode Membrane ◽  
Pem Water Electrolyzer

Bipolar membrane|electrode interface water electrolyzers (BPEMWE) were found to outperform a proton exchange membrane (PEM) water electrolyzer reference in a similar membrane electrode assembly (MEA) design based on individual porous...

Morphological Factors Affecting the Behavior of Water in Proton Exchange Membrane Materials

2019 ◽  
Vol 41 (1) ◽  
pp. 87-100 ◽  
Author(s):  
Gilles M. Divoux ◽  
Katherine A. Finlay ◽  
Jong K. Park ◽  
Ju-Myung Song ◽  
Bing Yan ◽  
...  
Keyword(s):  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Factors Affecting ◽  
Membrane Materials ◽  
Exchange Membrane

Modified Sliding Mode-Based Control of a Three-Level Interleaved DC-DC Buck Converter for Proton Exchange Membrane Water Electrolysis

2021 ◽  
Author(s):  
Burin Yodwong ◽  
Damien Guilbert ◽  
Wattana Kaewmanee ◽  
Matheepot Phattanasak ◽  
Melika Hinaje ◽  
...  
Keyword(s):  
Proton Exchange Membrane ◽  
Sliding Mode ◽  
Water Electrolysis ◽  
Buck Converter ◽  
Proton Exchange ◽  
Exchange Membrane

Proton Exchange Membrane Water Electrolysis Modeling for System Simulation and Degradation Analysis

2018 ◽  
Vol 90 (10) ◽  
pp. 1437-1442 ◽  
Author(s):  
Sönke Gößling ◽  
Sebastian Stypka ◽  
Matthias Bahr ◽  
Bernd Oberschachtsiek ◽  
Angelika Heinzel
Keyword(s):  
Proton Exchange Membrane ◽  
System Simulation ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Degradation Analysis ◽  
Exchange Membrane

Amorphous Ni-Co-B Catalyst for Hydrolysis of NaBH4 in Alkaline Solution

2011 ◽  
Vol 675-677 ◽  
pp. 33-36
Author(s):  
Chuan Wu ◽  
Ying Bai ◽  
Feng Wu ◽  
Dan Xian Liu
Keyword(s):  
Alkaline Solution ◽  
Photoelectron Spectroscopy ◽  
Proton Exchange Membrane ◽  
Hydrogen Generation ◽  
Chemical Reduction ◽  
Heat Treating ◽  
Proton Exchange ◽  
X Ray ◽  
Bet Analysis ◽  
Exchange Membrane

Amorphous Ni-Co-B catalyst was synthesized by a chemical reduction method, and followed by a heat-treating at 100°C, then characterized by X-ray diffraction (XRD), Scanning electronic microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmetr-Teller (BET) analysis, and adopted to help accelerating hydrolysis reaction of NaBH4 alkaline solution. It is proved that the amorphous Ni-Co-B catalyst is not a simple combination of elemental Ni, Co and B, but a multiplex metal boride. It exhibits an maximum hydrogen generation rate of 210 ml/min/(g catalyst) at 100% H2 utilization, which is potentially to give a successive H2 supply for proton exchange membrane fuel cells.

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