Ion Irradiation Inducing Oxygen Vacancy‐Rich NiO/NiFe 2 O 4 Heterostructure for Enhanced Electrocatalytic Water Splitting

Small ◽  
2021 ◽  
pp. 2103501
Author(s):  
Huizhou Zhong ◽  
Guoping Gao ◽  
Xuening Wang ◽  
Hengyi Wu ◽  
Shaohua Shen ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Water Splitting ◽  
Ion Irradiation

Constructing oxygen vacancy-enriched Fe2O3@NiO heterojunctions for highly efficient electrocatalytic alkaline water splitting

CrystEngComm ◽  
2021 ◽  
Author(s):  
Yan Sang ◽  
Xi Cao ◽  
Gaofei Ding ◽  
Zixuan Guo ◽  
Yingying Xue ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
High Purity ◽  
Oxygen Evolution Reaction ◽  
High Efficiency ◽  
Low Cost ◽  
Dual Function ◽  
Alkaline Water ◽  
High Purity Hydrogen

Electrolysis of water to produce high-purity hydrogen is a very promising method. The development of green, high-efficiency, long-lasting and low-cost dual function electrocatalysts for oxygen evolution reaction (OER) and hydrogen...

Boosting Oxygen Evolution Activity of NiFe-LDH Enabled by Oxygen Vacancy and Morphological Engineering

2021 ◽  
Author(s):  
ShuXuan Liu ◽  
Huiwen Zhang ◽  
Enlai Hu ◽  
Tuyuan Zhu ◽  
ChunYan Zhou ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Layered Double Hydroxides ◽  
Oxygen Evolution Reaction ◽  
Oxidation Process ◽  
Double Hydroxides

The sluggish kinetics and four electron oxidation process of oxygen evolution reaction (OER) limit the application of water splitting. Recently, NiFe-layered double hydroxides (NiFe LDHs) have shown great potential to...

Heterojunction and Oxygen Vacancy Modification of ZnO Nanorod Array Photoanode for Enhanced Photoelectrochemical Water Splitting

ChemSusChem ◽  
2018 ◽  
Vol 11 (23) ◽  
pp. 4094-4101 ◽  
Author(s):  
Xuefeng Long ◽  
Feng Li ◽  
Lili Gao ◽  
Yiping Hu ◽  
Haiguo Hu ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Water Splitting ◽  
Nanorod Array ◽  
Photoelectrochemical Water Splitting ◽  
Zno Nanorod ◽  
Zno Nanorod Array

Oxygen vacancy engineering of WO3 toward largely enhanced photoelectrochemical water splitting

2018 ◽  
Vol 274 ◽  
pp. 217-223 ◽  
Author(s):  
Ruikang Zhang ◽  
Fanyu Ning ◽  
Simin Xu ◽  
Lei Zhou ◽  
Mingfei Shao ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Water Splitting ◽  
Photoelectrochemical Water Splitting

Simple synthesis of a vacancy-rich NiO 2D/3D dendritic self-supported electrode for efficient overall water splitting

Nanoscale ◽  
2019 ◽  
Vol 11 (47) ◽  
pp. 22734-22742 ◽  
Author(s):  
Renjie Ji ◽  
Fan Zhang ◽  
Yonghong Liu ◽  
Yuan Pan ◽  
Zhijian Li ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Water Splitting ◽  
Simple Synthesis ◽  
Overall Water Splitting ◽  
3D Nanostructures ◽  
2D And 3D Nanostructures ◽  
2D And 3D

A dendritic electrode consisting of oxygen-vacancy-rich NiO embedded within ultrathin 2D and 3D nanostructures for overall water splitting is firstly developed.

N+-ion irradiation engineering towards the efficient oxygen evolution reaction on NiO nanosheet arrays

2019 ◽  
Vol 7 (9) ◽  
pp. 4729-4733 ◽  
Author(s):  
Baorui Xia ◽  
Tongtong Wang ◽  
Xingdong Jiang ◽  
Jun Li ◽  
Tongming Zhang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Ion Irradiation ◽  
Nanosheet Arrays ◽  
New Generation

The oxygen evolution reaction (OER) is an essential process in water splitting, which is highly relevant to the new generation of energy exploration approaches. N+ ions irradiation is an effective method for improving the OER electrocatalytic capacity of NiO.

scholarly journals Superlative Photoelectrochemical Properties of 3D MgCr- LDH Nanoflowers influencing towards Photoinduced Water Splitting Reactions

2021 ◽  
Author(s):  
susanginee nayak ◽  
Kulamani M. Parida
Keyword(s):  
Charge Transfer ◽  
Oxygen Vacancy ◽  
Water Splitting ◽  
Water Oxidation ◽  
High Current Density ◽  
Chemical Characterization ◽  
Nyquist Plot ◽  
Separation Mechanism ◽  
Open Structure ◽  
Defect Sites

Abstract Layered double hydroxides (LDHs) are competent photocatalysts for water splitting reactions, vital to produce solar fuels, but their restricted available reactive sites, slow mass and charge transfer, are yet remain a challenge. To surmount these lacunas, Nanoflowers-like three-dimensional (3D) open structure of MgCr-LDH have been designed in a substrate-free path by one-step formamide assisted hydrothermal treatment followed by visible light irradiation and utilized as efficient photocatalysts for the H2 and O2 production. The structural, morphological, optical and photoelectrochemical (PEC) properties of the MgCr-LDH nanoflowers were extensively examined, by various physico-chemical characterization techniques. Moreover, the well-designed 3D MgCr-LDH nanoflowers with open structure were formed by a stacking of numerous 2D nanosheets, which inherently triggered with magnificent PEC properties, including high current density of 6.9 mA/cm2, smallest arc of the Nyquist plot (59.1 Ω cm−2) with photostability of 6000 s thereby enhancing the photocatalytic water splitting activity along. Moreover such a perfectly self-stacked 2D nanosheet in 3D MgCr-LDH possess defect sites as enriched 50% oxygen vacancy resulting a good contact surface within the structure for effective light absorption and easy electron and hole separation, facilitates the adsorption of protons and intermediate of water oxidation. Further, the doped Cr3+ pull up electrons from water oxidation intermediates, thereby displaying superior photocatalytic H2 and O2 production activity of 1315 µmol/h and 579 µmol/h, respectively. Favorable oxygen vacancy type defect surface with Cr3+ dopant in MgCr-LDH triggers significant PEC properties, which influences the easy charge transfer and separation mechanism and robustly enhance the photocatalytic performance of the nanoflower.

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