scholarly journals Water Splitting: Periodic Porous 3D Electrodes Mitigate Gas Bubble Traffic during Alkaline Water Electrolysis at High Current Densities (Adv. Energy Mater. 46/2020)

2020 ◽  
Vol 10 (46) ◽  
pp. 2070189
Author(s):  
Tianyi Kou ◽  
Shanwen Wang ◽  
Rongpei Shi ◽  
Tao Zhang ◽  
Samuel Chiovoloni ◽  
...  
Keyword(s):  
Water Splitting ◽  
Water Electrolysis ◽  
Gas Bubble ◽  
High Current ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water ◽  
3D Electrodes ◽  
Current Densities ◽  
Energy Mater

Periodic Porous 3D Electrodes Mitigate Gas Bubble Traffic during Alkaline Water Electrolysis at High Current Densities

2020 ◽  
Vol 10 (46) ◽  
pp. 2002955
Author(s):  
Tianyi Kou ◽  
Shanwen Wang ◽  
Rongpei Shi ◽  
Tao Zhang ◽  
Samuel Chiovoloni ◽  
...  
Keyword(s):  
Water Electrolysis ◽  
Gas Bubble ◽  
High Current ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water ◽  
3D Electrodes ◽  
Current Densities

Atomic Heterointerface Engineering Breaks Activity Limitation of Electrocatalysts and Promises Highly-Efficient Alkaline Water Splitting

2021 ◽  
Author(s):  
Qiucheng Xu ◽  
Jiahao Zhang ◽  
Haoxuan Zhang ◽  
Liyue Zhang ◽  
Ling Chen ◽  
...  
Keyword(s):  
Water Splitting ◽  
Anion Exchange ◽  
Low Cost ◽  
Water Electrolysis ◽  
Anion Exchange Membrane ◽  
Alkaline Water Electrolysis ◽  
Green Electricity ◽  
Alkaline Water ◽  
Highly Efficient ◽  
Exchange Membrane

Alkaline water splitting, especially the anion-exchange-membrane based water electrolysis, is an attractive way for low-cost and scalable H2 production. Green electricity-driven alkaline water electrolysis is requested to develop highly-efficient electrocatalysts...

scholarly journals Investigation of the stability of NiFe-(oxy)hydroxide anodes in alkaline water electrolysis under industrially relevant conditions

2020 ◽  
Vol 10 (16) ◽  
pp. 5593-5601 ◽  
Author(s):  
Marco Etzi Coller Pascuzzi ◽  
Alex J. W. Man ◽  
Andrey Goryachev ◽  
Jan P. Hofmann ◽  
Emiel J. M. Hensen
Keyword(s):  
Elevated Temperature ◽  
Current Density ◽  
Anodic Polarization ◽  
High Current Density ◽  
Water Electrolysis ◽  
High Current ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water ◽  
And Performance ◽  
The Stability

Anodic polarization conducted at high current density, elevated temperature, and high KOH concentration impacted the structure and performance of NiFeOxHy and NiOxHy anodes.

scholarly journals Alkaline Water Splitting: NiFe/(Ni,Fe) 3 S 2 Core/Shell Nanowire Arrays as Outstanding Catalysts for Electrolytic Water Splitting at High Current Densities (Small Methods 10/2019)

Small Methods ◽  
2019 ◽  
Vol 3 (10) ◽  
pp. 1970032
Author(s):  
Cheng‐Ting Hsieh ◽  
Xui‐Fang Chuah ◽  
Chun‐Lung Huang ◽  
Hao‐Wei Lin ◽  
Yu‐An Chen ◽  
...  
Keyword(s):  
Water Splitting ◽  
Nanowire Arrays ◽  
Core Shell ◽  
High Current ◽  
Alkaline Water ◽  
Current Densities

Modelling and control of an alkaline water electrolysis process

2018 ◽  
Vol 1 (2) ◽  
pp. 9-14
Author(s):  
Marisol Cervantes-Bobadilla ◽  
Ricardo Fabricio Escobar Jiménez ◽  
José Francisco Gómez Aguilar ◽  
Tomas Emmanuel Higareda Pliego ◽  
Alberto Armando Alvares Gallegos
Keyword(s):  
Process Model ◽  
Water Electrolysis ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water ◽  
Electrolysis Process ◽  
Linear Dynamic ◽  
Energy Current ◽  
Identification Technique ◽  
Nonlinear Static ◽  
And Control

In this research, an alkaline water electrolysis process is modelled. The electrochemical electrolysis is carried out in an electrolyzer composed of 12 series-connected steel cells with a solution 30% wt of potassium hydroxide. The electrolysis process model was developed using a nonlinear identification technique based on the Hammerstein structure. This structure consists of a nonlinear static block and a linear dynamic block. In this work, the nonlinear static function is modelled by a polynomial approximation equation, and the linear dynamic is modelled using the ARX structure. To control the current feed to the electrolyzer an unconstraint predictive controller was implemented, once the unconstrained MPC was simulated, some restrictions are proposed to design a constrained MPC (CMPC). The CMPC aim is to reduce the electrolyzer's energy consumption (power supply current). Simulation results showed the advantages of using the CMPC since the energy (current) overshoots are avoided.

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