Stabilizing Oxygen Intermediates on Redox-Flexible Active Sites in Multimetallic Ni-Fe-Al-Co Layered Double Hydroxide Anodes for Excellent Alkaline and Seawater Electrolysis

2021 ◽  
Author(s):  
Enhbayar Enhtuwshin ◽  
Kang Min Kim ◽  
Young-Kwang Kim ◽  
Sungwook Mhin ◽  
So Jung Kim ◽  
...  
Keyword(s):  
Water Splitting ◽  
Layered Double Hydroxide ◽  
Layered Double Hydroxides ◽  
Oxygen Evolution Reaction ◽  
Active Sites ◽  
Oxygen Intermediates ◽  
Nickel Iron ◽  
Double Hydroxide ◽  
Double Hydroxides ◽  
Seawater Electrolysis

Development of an efficient and stable electrocatalyst for oxygen evolution reaction (OER) is crucial to make hydrogen generated via water splitting as a sustainable fuel. Nickel iron layered double hydroxides...

A highly efficient and durable water splitting system: platinum sub-nanocluster functionalized nickel–iron layered double hydroxide as the cathode and hierarchical nickel–iron selenide as the anode

2019 ◽  
Vol 7 (6) ◽  
pp. 2831-2837 ◽  
Author(s):  
Qing Yan ◽  
Peng Yan ◽  
Tong Wei ◽  
Guiling Wang ◽  
Kui Cheng ◽  
...  
Keyword(s):  
Water Splitting ◽  
Layered Double Hydroxide ◽  
Layered Double Hydroxides ◽  
Nickel Iron ◽  
Iron Selenide ◽  
Highly Efficient ◽  
Double Hydroxide ◽  
Double Hydroxides ◽  
Splitting System

A highly-efficient water splitting device is assembled with the platinum sub-nanoclusters functionalized nickel iron layered double hydroxides and hierarchical nickel iron selenides.

scholarly journals Layered double hydroxide-based electrocatalysts for the oxygen evolution reaction: identification and tailoring of active sites, and superaerophobic nanoarray electrode assembly

2021 ◽  
Author(s):  
Daojin Zhou ◽  
Pengsong Li ◽  
Xiao Lin ◽  
Adam McKinley ◽  
Yun Kuang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Layered Double Hydroxides ◽  
Oxygen Evolution Reaction ◽  
Active Sites ◽  
Double Hydroxide ◽  
Double Hydroxides

Opportunities and challenges in tailoring layered double hydroxides and constructing them into superaerophobic nanoarray electrodes for an efficient oxygen evolution reaction

Two-dimensional layered double hydroxide as a platform for electrocatalytic oxygen evolution

2021 ◽  
Author(s):  
Jie Yu ◽  
Feng Yu ◽  
Muk-Fung Yuen ◽  
Chundong Wang
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Layered Double Hydroxides ◽  
Oxygen Evolution Reaction ◽  
Essential Role ◽  
Two Dimensional ◽  
Double Hydroxide ◽  
Double Hydroxides

The Oxygen Evolution Reaction (OER) plays an essential role in hydrogen production for water splitting, metal-air secondary batteries, and artificial photosynthesis. Among the various OER catalysts, layered double hydroxides (LDHs)...

scholarly journals Engineering single-atomic ruthenium catalytic sites on defective nickel-iron layered double hydroxide for overall water splitting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Panlong Zhai ◽  
Mingyue Xia ◽  
Yunzhen Wu ◽  
Guanghui Zhang ◽  
Junfeng Gao ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Layered Double Hydroxide ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Density Functional ◽  
Rational Design ◽  
Single Atom ◽  
Nickel Iron ◽  
Double Hydroxide

AbstractRational design of single atom catalyst is critical for efficient sustainable energy conversion. However, the atomic-level control of active sites is essential for electrocatalytic materials in alkaline electrolyte. Moreover, well-defined surface structures lead to in-depth understanding of catalytic mechanisms. Herein, we report a single-atomic-site ruthenium stabilized on defective nickel-iron layered double hydroxide nanosheets (Ru1/D-NiFe LDH). Under precise regulation of local coordination environments of catalytically active sites and the existence of the defects, Ru1/D-NiFe LDH delivers an ultralow overpotential of 18 mV at 10 mA cm−2 for hydrogen evolution reaction, surpassing the commercial Pt/C catalyst. Density functional theory calculations reveal that Ru1/D-NiFe LDH optimizes the adsorption energies of intermediates for hydrogen evolution reaction and promotes the O–O coupling at a Ru–O active site for oxygen evolution reaction. The Ru1/D-NiFe LDH as an ideal model reveals superior water splitting performance with potential for the development of promising water-alkali electrocatalysts.

Ultrasonication-assisted synthesis of ternary-component Ni3AlxFe1−x-layered double hydroxide nanoparticles for the oxygen evolution reaction in a neutral solution

2018 ◽  
Vol 42 (16) ◽  
pp. 13963-13970 ◽  
Author(s):  
Leila Jafari Foruzin ◽  
Biuck Habibi ◽  
Zolfaghar Rezvani
Keyword(s):  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Layered Double Hydroxides ◽  
Oxygen Evolution Reaction ◽  
Neutral Solution ◽  
Rapid Process ◽  
Double Hydroxide ◽  
Double Hydroxides ◽  
Ternary Component ◽  
Layered Double Hydroxide Nanoparticles

In this study, ultrasonication, a facile and rapid process, was utilized for the preparation of ternary-component layered double hydroxides (LDHs), Ni3AlxFe1−x-LDHs, as the electrocatalyst material for the oxygen evolution reaction (OER) in a neutral solution.

scholarly journals Modulating the electronic structure of ultrathin layered double hydroxide nanosheets with fluorine: an efficient electrocatalyst for the oxygen evolution reaction

2019 ◽  
Vol 7 (24) ◽  
pp. 14483-14488 ◽  
Author(s):  
Zhijuan Liu ◽  
Chung-Li Dong ◽  
Yu-Cheng Huang ◽  
Jiajie Cen ◽  
Haotian Yang ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Plasma Etching ◽  
Layered Double Hydroxides ◽  
Oxygen Evolution Reaction ◽  
Etching Technique ◽  
Double Hydroxide ◽  
Double Hydroxides

Herein, we effectively modulate the electronic structure of Co3Fe layered double hydroxides (LDHs) by F-doping using a CHF3-plasma etching technique.

Identifying dual functions of rGO in a BiVO4/rGO/NiFe-layered double hydroxide photoanode for efficient photoelectrochemical water splitting

2020 ◽  
Vol 8 (26) ◽  
pp. 13231-13240 ◽  
Author(s):  
Hua Chen ◽  
Songcan Wang ◽  
Jianzhong Wu ◽  
Xiacong Zhang ◽  
Jia Zhang ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Water Splitting ◽  
Layered Double Hydroxides ◽  
Oxygen Evolution Reaction ◽  
Surface Reaction ◽  
Photocurrent Density ◽  
Surface Reaction Kinetics ◽  
Double Hydroxide ◽  
Double Hydroxides ◽  
Dual Functions

To enhance surface reaction kinetics for oxygen evolution reaction, nanoporous BiVO4 photoanodes are modified by rGO and NiFe-layered double hydroxides, leading to an enhanced photocurrent density of 3.26 mA cm−2 under AM 1.5 G illumination.

Activating basal plane in NiFe layered double hydroxide by Mn2+ doping for efficient and durable oxygen evolution reaction

2018 ◽  
Vol 3 (5) ◽  
pp. 532-537 ◽  
Author(s):  
Daojin Zhou ◽  
Zhao Cai ◽  
Yin Jia ◽  
Xuya Xiong ◽  
Qixian Xie ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Layered Double Hydroxides ◽  
Oxygen Evolution Reaction ◽  
Basal Plane ◽  
Fe Sites ◽  
Double Hydroxide ◽  
Double Hydroxides

Reducing Mn2+ ions were doped to tailor the electronic structure of Ni and Fe sites in NiFe-layered double hydroxides.

Design and Preparation of Three-Dimensional Hetero-electrocatalysts of NiCo -Layered Double Hydroxide Nanosheets Incorporated with Silver Nanoclusters for Enhanced Oxygen Evolution Reactions

Nanoscale ◽  
2021 ◽  
Author(s):  
Bingxian Chu ◽  
Qiuxia Ma ◽  
Ze-Sheng Li ◽  
Bolin Li ◽  
Furong Huang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Layered Double Hydroxides ◽  
Active Sites ◽  
Three Dimensional ◽  
Silver Nanoclusters ◽  
Double Hydroxide ◽  
Double Hydroxides

Layered double hydroxides (LDHs) are one of the most effective electrocatalysts. However, it is still needed to improve the lower conductivity and limited active sites of LDHs to enhance their...

scholarly journals 3D-printed NiFe-layered double hydroxide pyramid electrodes for enhanced electrocatalytic oxygen evolution reaction

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Jinhyuck Ahn ◽  
Yoo Sei Park ◽  
Sanghyeon Lee ◽  
Juchan Yang ◽  
Jaeyeon Pyo ◽  
...  
Keyword(s):  
Surface Area ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Oxygen Evolution Reaction ◽  
Active Sites ◽  
Step Method ◽  
Highly Active ◽  
3D Printed ◽  
Double Hydroxide

AbstractElectrochemical water splitting has been considered one of the most promising methods of hydrogen production, which does not cause environmental pollution or greenhouse gas emissions. Oxygen evolution reaction (OER) is a significant step for highly efficient water splitting because OER involves the four electron transfer, overcoming the associated energy barrier that demands a potential greater than that required by hydrogen evolution reaction. Therefore, an OER electrocatalyst with large surface area and high conductivity is needed to increase the OER activity. In this work, we demonstrated an effective strategy to produce a highly active three-dimensional (3D)-printed NiFe-layered double hydroxide (LDH) pyramid electrode for OER using a three-step method, which involves direct-ink-writing of a graphene pyramid array and electrodeposition of a copper conducive layer and NiFe-LDH electrocatalyst layer on printed pyramids. The 3D pyramid structures with NiFe-LDH electrocatalyst layers increased the surface area and the active sites of the electrode and improved the OER activity. The overpotential (η) and exchange current density (i0) of the NiFe-LDH pyramid electrode were further improved compared to that of the NiFe-LDH deposited Cu (NiFe-LDH/Cu) foil electrode with the same base area. The 3D-printed NiFe-LDH electrode also exhibited excellent durability without potential decay for 60 h. Our 3D printing strategy provides an effective approach for the fabrication of highly active, stable, and low-cost OER electrocatalyst electrodes.

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