scholarly journals N-Doped Graphene-Decorated NiCo Alloy Coupled with Mesoporous NiCoMoO Nano-sheet Heterojunction for Enhanced Water Electrolysis Activity at High Current Density

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Guangfu Qian ◽  
Jinli Chen ◽  
Tianqi Yu ◽  
Lin Luo ◽  
Shibin Yin
Keyword(s):  
Current Density ◽  
Mechanical Stability ◽  
High Current Density ◽  
Nickel Foam ◽  
Water Electrolysis ◽  
Bifunctional Catalyst ◽  
Intrinsic Activity ◽  
High Current ◽  
Actual Application ◽  
Doped Graphene

AbstractDeveloping highly effective and stable non-noble metal-based bifunctional catalyst working at high current density is an urgent issue for water electrolysis (WE). Herein, we prepare the N-doped graphene-decorated NiCo alloy coupled with mesoporous NiCoMoO nano-sheet grown on 3D nickel foam (NiCo@C-NiCoMoO/NF) for water splitting. NiCo@C-NiCoMoO/NF exhibits outstanding activity with low overpotentials for hydrogen and oxygen evolution reaction (HER: 39/266 mV; OER: 260/390 mV) at ± 10 and ± 1000 mA cm−2. More importantly, in 6.0 M KOH solution at 60 °C for WE, it only requires 1.90 V to reach 1000 mA cm−2 and shows excellent stability for 43 h, exhibiting the potential for actual application. The good performance can be assigned to N-doped graphene-decorated NiCo alloy and mesoporous NiCoMoO nano-sheet, which not only increase the intrinsic activity and expose abundant catalytic activity sites, but also enhance its chemical and mechanical stability. This work thus could provide a promising material for industrial hydrogen production.

scholarly journals 2D CoOOH Sheet-Encapsulated Ni2P into Tubular Arrays Realizing 1000 mA cm−2-Level-Current-Density Hydrogen Evolution Over 100 h in Neutral Water

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Shucong Zhang ◽  
Wenbin Wang ◽  
Feilong Hu ◽  
Yan Mi ◽  
Shuzhe Wang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Current Density ◽  
High Efficiency ◽  
Mechanical Stability ◽  
High Current Density ◽  
Water Electrolysis ◽  
Intrinsic Activity ◽  
High Current ◽  
Neutral Water ◽  
Tubular Arrays

AbstractWater electrolysis at high current density (1000 mA cm−2 level) with excellent durability especially in neutral electrolyte is the pivotal issue for green hydrogen from experiment to industrialization. In addition to the high intrinsic activity determined by the electronic structure, electrocatalysts are also required to be capable of fast mass transfer (electrolyte recharge and bubble overflow) and high mechanical stability. Herein, the 2D CoOOH sheet-encapsulated Ni2P into tubular arrays electrocatalytic system was proposed and realized 1000 mA cm−2-level-current-density hydrogen evolution over 100 h in neutral water. In designed catalysts, 2D stack structure as an adaptive material can buffer the shock of electrolyte convection, hydrogen bubble rupture, and evolution through the release of stress, which insure the long cycle stability. Meanwhile, the rich porosity between stacked units contributed the good infiltration of electrolyte and slippage of hydrogen bubbles, guaranteeing electrolyte fast recharge and bubble evolution at the high-current catalysis. Beyond that, the electron structure modulation induced by interfacial charge transfer is also beneficial to enhance the intrinsic activity. Profoundly, the multiscale coordinated regulation will provide a guide to design high-efficiency industrial electrocatalysts.

scholarly journals Chemically stabilised extruded and recast short side chain Aquivion® proton exchange membranes for high current density operation in water electrolysis

2019 ◽  
Vol 578 ◽  
pp. 136-148 ◽  
Author(s):  
Stefania Siracusano ◽  
Claudio Oldani ◽  
Maria Assunta Navarra ◽  
Stefano Tonella ◽  
Lucia Mazzapioda ◽  
...  
Keyword(s):  
Current Density ◽  
High Current Density ◽  
Water Electrolysis ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Side Chain ◽  
High Current ◽  
Short Side

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 High Current Density Solid Polymer Electrolyte Water Electrolysis

1997 ◽  
Vol 65 (12) ◽  
pp. 1122-1123 ◽  
Author(s):  
Yasuo NISHIMURA ◽  
Kazuaki YASUDA ◽  
Zyun SIROMA ◽  
Kinji ASAKA
Keyword(s):  
Polymer Electrolyte ◽  
Current Density ◽  
Solid Polymer Electrolyte ◽  
High Current Density ◽  
Water Electrolysis ◽  
Solid Polymer ◽  
High Current

Growth of aluminum-substituted nickel hydroxide nanoflakes on nickel foam with ultrahigh specific capacitance at high current density

2014 ◽  
Vol 50 (6) ◽  
pp. 2422-2428 ◽  
Author(s):  
Minmin Wang ◽  
Junying Xue ◽  
Fangming Zhang ◽  
Wenle Ma ◽  
Hongtao Cu
Keyword(s):  
Specific Capacitance ◽  
Current Density ◽  
Nickel Hydroxide ◽  
High Current Density ◽  
Nickel Foam ◽  
High Current

Rh2P Nanoparticles Partially Embedded in N/P-Doped Carbon Scaffold at Ultralow Metal Loading for High Current Density Water Electrolysis

2021 ◽  
Vol 4 (4) ◽  
pp. 3369-3376
Author(s):  
Xiuju Wu ◽  
Rongfei Wang ◽  
Wei Li ◽  
Bomin Feng ◽  
Weihua Hu
Keyword(s):  
Current Density ◽  
High Current Density ◽  
Water Electrolysis ◽  
High Current ◽  
Metal Loading

Bifunctional CoNi/CoFe2O4 /Ni foam electrodes for efficient overall water splitting at a high current density

2018 ◽  
Vol 6 (39) ◽  
pp. 19221-19230 ◽  
Author(s):  
Shasha Li ◽  
Suchada Sirisomboonchai ◽  
Akihiro Yoshida ◽  
Xiaowei An ◽  
Xiaogang Hao ◽  
...  
Keyword(s):  
Porous Structure ◽  
Water Splitting ◽  
Current Density ◽  
High Current Density ◽  
Nickel Foam ◽  
High Current ◽  
Ni Foam ◽  
Overall Water Splitting

An electrocatalyst composed of CoNi(hydroxide) nanosheets and flower-like CoFe2O4 particles with multiple porous structure is successfully deposited on nickel foam and applied for overall water splitting.

A three-dimensional coral-like Zn,O-codoped Ni3S2 electrocatalyst for efficient overall water splitting at a large current density

2022 ◽  
Author(s):  
Liyun Cao ◽  
Yifei Zhang ◽  
Liangliang Feng ◽  
Danyang He ◽  
Qianqian Liu ◽  
...  
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Solvothermal Method ◽  
High Current Density ◽  
Nickel Foam ◽  
Three Dimensional ◽  
High Current ◽  
Large Current ◽  
Large Current Density ◽  
Facile Solvothermal Method

A three-dimensional coral-like Zn,O-codoped Ni3S2 nanostructure is grown on nickel foam via a facile solvothermal method, exhibiting excellent electrocatalytic performance at high current density.

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