Ultrafast synthesis of Cu2O octahedrons inlaid in Ni foam for efficient alkaline water/seawater electrolysis

Abstract Seawater is one of the most abundant natural resources on our planet. Electrolysis of seawater is not only a promising approach to produce clean hydrogen energy, but also of great significance to seawater desalination. The implementation of seawater electrolysis requires robust and efficient electrocatalysts that can sustain seawater splitting without chloride corrosion, especially for the anode. Here we report a three-dimensional core-shell metal-nitride catalyst consisting of NiFeN nanoparticles uniformly decorated on NiMoN nanorods supported on Ni foam, which serves as an eminently active and durable oxygen evolution reaction catalyst for alkaline seawater electrolysis. Combined with an efficient hydrogen evolution reaction catalyst of NiMoN nanorods, we have achieved the industrially required current densities of 500 and 1000 mA cm−2 at record low voltages of 1.608 and 1.709 V, respectively, for overall alkaline seawater splitting at 60 °C. This discovery significantly advances the development of seawater electrolysis for large-scale hydrogen production.

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Highly conductive and metallic cobalt–nickel selenide nanorods supported on Ni foam as an efficient electrocatalyst for alkaline water splitting

Nanoscale ◽

10.1039/c8nr10545f ◽

2019 ◽

Vol 11 (16) ◽

pp. 7959-7966 ◽

Cited By ~ 34

Author(s):

Shu Liu ◽

Yimin Jiang ◽

Miao Yang ◽

Mengjie Zhang ◽

Qifei Guo ◽

...

Keyword(s):

Water Splitting ◽

Metallic Cobalt ◽

Ni Foam ◽

Alkaline Water ◽

Overall Water Splitting ◽

Cobalt Nickel

Co0.75Ni0.25Se/NF for overall water splitting.

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Dynamic Model For Solar Hydrogen Via Alkaline Water Electrolyzer: A Real-Time Techno-economic Perspective With And Without Energy Storage System

2020 20th International Conference on Control, Automation and Systems (ICCAS) ◽

10.23919/iccas50221.2020.9268396 ◽

2020 ◽

Author(s):

Haider Niaz ◽

Jay Liu

Keyword(s):

Energy Storage ◽

Real Time ◽

Dynamic Model ◽

Storage System ◽

Energy Storage System ◽

Economic Perspective ◽

Solar Hydrogen ◽

Alkaline Water

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Modelling and control of an alkaline water electrolysis process

International Journal of Computational Physics Series ◽

10.29167/a1i2p9-14 ◽

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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NixFeyN@C microsheet arrays on Ni foam as an efficient and durable electrocatalyst for electrolytic splitting of alkaline seawater

Journal of Materials Chemistry A ◽

10.1039/d1ta01292d ◽

2021 ◽

Author(s):

Boran Wang ◽

Mengjie Lu ◽

Duo Chen ◽

Qi Zhang ◽

Wenwen Wang ◽

...

Keyword(s):

Iron Nitride ◽

Ni Foam ◽

Nickel Iron ◽

Porous Architecture

A self-supported nickel-iron nitride microsheet arrays coated with carbon is grown on commercial Ni foam (NixFeyN@C/NF) and used as electrocatalyst for splitting of seawater. The porous architecture and superhydrophilic/superaerophobic surface...

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