Modulating the Oxidation State of Nickel–Iron Layered Double Hydroxide by Natural Cooling for Oxygen Evolution Reaction

CrystEngComm ◽  
2022 ◽  
Author(s):  
Yong Wu ◽  
Qin Zhang ◽  
Cheng Bai ◽  
Xinyu Zhang ◽  
Xiaolin Hu ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Oxidation State ◽  
Oxygen Evolution Reaction ◽  
Surface Oxidation ◽  
Nickel Iron ◽  
Double Hydroxide

Regulating surface oxidation state and understanding how it govern the reactivity and durability of electrocatalysts are a key problem for designing the promising OER electrocatalysts. Here, it is reported that...

scholarly journals Nickel-Iron Layered Double Hydroxide for Highly Efficient Oxygen Evolution Reaction

2021 ◽  
Vol 290 ◽  
pp. 01036
Author(s):  
Qiuyu Zhao ◽  
Wenke Xi ◽  
Jianjun Wang
Keyword(s):  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Oxygen Evolution Reaction ◽  
Nickel Foam ◽  
Chemical Route ◽  
Nickel Iron ◽  
Long Term Stability ◽  
3D Space ◽  
New Strategy ◽  
Double Hydroxide

It is extensively accepted that electrolysis of water producing regenerable energy is a crucial substitution of traditional fuel strategy. Herein, we report a wet-chemical route to Ni-Fe layered double hydroxide (LDH) interconnected nanosheets with large surface area with the support of vertically aligned ZnO microrods arrays on the nickel foam (Ni-Fe LDH@ZnO/NF) for oxygen evolution reaction. Owing to the 2D Ni-Fe LDH nanosheets distributed in 3D space, the Ni-Fe LDH@ZnO/NF demonstrates excellent OER performances with a reasonably low overpotential of 271 mV at a current density of 10 mA·cm-2, and a long-term stability up to 29 hours. This work proposes a new strategy to prepare Ni-Fe LDH/NF as efficient OER catalyst.

scholarly journals Engineering Active Fe Sites on Nickel–Iron Layered Double Hydroxide through Component Segregation for Oxygen Evolution Reaction

ChemSusChem ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 811-818 ◽  
Author(s):  
Chunlei Peng ◽  
Nian Ran ◽  
Gang Wan ◽  
Wanpeng Zhao ◽  
Zhaoyu Kuang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Oxygen Evolution Reaction ◽  
Nickel Iron ◽  
Fe Sites ◽  
Double Hydroxide

Facile synthesis of nanoparticle-stacked tungsten-doped nickel iron layered double hydroxide nanosheets for boosting oxygen evolution reaction

2020 ◽  
Vol 8 (16) ◽  
pp. 8096-8103 ◽  
Author(s):  
Libo Wu ◽  
Luo Yu ◽  
Fanghao Zhang ◽  
Dezhi Wang ◽  
Dan Luo ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Water Bath ◽  
Oxidation Catalyst ◽  
Facile Synthesis ◽  
Nickel Iron ◽  
Double Hydroxide

Nanoparticle-stacked tungsten-doped nickel iron layered double hydroxide (Ni–Fe–W LDH) nanosheets have been synthesized through a facile water bath reaction as efficient water oxidation catalyst.

scholarly journals Postsynthetic treatment of nickel–iron layered double hydroxides for the optimum catalysis of the oxygen evolution reaction

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Daire Tyndall ◽  
Sonia Jaskaniec ◽  
Brian Shortall ◽  
Ahin Roy ◽  
Lee Gannon ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Size Control ◽  
Operating Conditions ◽  
Nickel Iron ◽  
Treatment Techniques ◽  
Site Density ◽  
Synthetic Approaches ◽  
Double Hydroxide ◽  
Double Hydroxides

AbstractNickel–iron-layered double hydroxide (NiFe LDH) platelets with high morphological regularity and submicrometre lateral dimensions were synthesized using a homogeneous precipitation technique for highly efficient catalysis of the oxygen evolution reaction (OER). Considering edge sites are the point of activity, efforts were made to control platelet size within the synthesized dispersions. The goal is to controllably isolate and characterize size-reduced NiFe LDH particles. Synthetic approaches for size control of NiFe LDH platelets have not been transferable based on published work with other LDH materials and for that reason, we instead use postsynthetic treatment techniques to improve edge-site density. In the end, size-reduced NiFe LDH/single-wall carbon nanotube (SWCNT) composites allowed to further reduce the OER overpotential to 237 ± 7 mV (<L> = 0.16 ± 0.01 μm, 20 wt% SWCNT), which is one of the best values reported to date. This approach as well improved the long-term activity of the catalyst in operating conditions.

Hierarchically porous FeNi3@FeNi layered double hydroxide nanostructures: One-step fast electrodeposition and highly efficient electrocatalytic performances for overall water splitting

2021 ◽  
Author(s):  
Zihao Liu ◽  
Shifeng Li ◽  
Fangfang Wang ◽  
Mingxia Li ◽  
Yonghong Ni
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Hierarchically Porous ◽  
One Step ◽  
Double Hydroxide

FeNi-layered double hydroxide (LDH) is thought to be an excellent electrocatalyst for oxygen evolution reaction (OER), but it always shows extremely poor electrocatalytic activity toward hydrogen evolution reaction (HER) in...

LDH-derived phosphide/N-doped graphene oxide hierarchical electrocatalyst for enhanced oxygen evolution reaction

CrystEngComm ◽  
2022 ◽  
Author(s):  
Meng Ya Yang ◽  
Rong Zhao ◽  
Yi Liu ◽  
Hua Lin
Keyword(s):  
Graphene Oxide ◽  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Hierarchical Structure ◽  
Oxygen Evolution Reaction ◽  
High Efficient ◽  
Doped Graphene ◽  
Double Hydroxide

In this work, high efficient electrocatalyst Fe-Ni2P/N-GO with hierarchical structure was developed through phosphating NiFe-based layered double hydroxide (LDH) supported by N-doped graphene oxide (GO), which was assembled by the...

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