Plasma-assisted defect engineering of N-doped NiCo2O4 for efficient oxygen reduction

2021 ◽  
Author(s):  
Jingxuan Zheng ◽  
Xiangfeng Peng ◽  
Zhao Wang
Keyword(s):  
Metal Oxide ◽  
Oxygen Reduction ◽  
Cold Plasma ◽  
Oxygen Vacancies ◽  
Defect Engineering ◽  
Defect Control ◽  
Plasma Oxygen

Defect control is a promising way to enhance the electrocatalysis performance of metal oxide. Oxygen vacancies enriched NiCo2O4 were successfully prepared by cold plasma. Oxygen as plasma-forming gas also can...

Graphene-Induced Growth of Co3O4 Nanoplates with Modulable Oxygen Vacancies for Improved OER Properties

CrystEngComm ◽  
2021 ◽  
Author(s):  
Xinheng Li ◽  
Lei Qi ◽  
Mei Wang
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Hydrothermal Treatment ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Oxygen Vacancies ◽  
Transition Metal Oxide ◽  
Oxide Hydroxide

Transition metal oxide/ hydroxide is intensively studied for oxygen evolution reaction (OER). Herein, graphene-induced growth of Co3O4 nanoplates with modulable oxygen vacancies via hydrothermal treatment is reported. With the increase...

Topological defects involving Fe/N co-doped mesoporous carbon nanosheets as novel electrocatalysts for the oxygen reduction reaction and Zn–air batteries

Nanoscale ◽  
2021 ◽  
Author(s):  
Junjie Ding ◽  
Dongchuang Wu ◽  
Senhe Huang ◽  
Chenbao Lu ◽  
Yu Chen ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Topological Defects ◽  
Reduction Reaction ◽  
Defect Engineering ◽  
Carbon Nanosheets ◽  
Renewable Energy Technologies ◽  
Central Focus ◽  
Energy Technologies ◽  
Co Doped

Developing effective electrocatalysts for oxygen reduction reaction is of great significance for clean and renewable energy technologies, such as metal–air batteries and fuel cells. Defect engineering is the central focus...

Heterojunction-induced nickel-based oxygen vacancies on N-enriched porous carbons for enhanced alkaline hydrogen oxidation and oxygen reduction

2021 ◽  
Author(s):  
Jin-Tao Ren ◽  
Zhong-Yong Yuan
Keyword(s):  
Nickel Oxide ◽  
Oxygen Reduction ◽  
Oxygen Vacancies ◽  
Hydrogen Oxidation ◽  
Graphitic Carbon ◽  
Porous Carbons ◽  
Oxide Heterostructures ◽  
Alkaline Water ◽  
Oxygen Reduction Reactions

In situ-formed nickel/nickel oxide heterostructures coupled with N-doped graphitic carbon significantly promote the hydrogen oxidation and oxygen reduction reactions in alkaline water.

Room temperature Mg reduction of TiO2: formation mechanism and application in photocatalysis

2019 ◽  
Vol 55 (53) ◽  
pp. 7675-7678 ◽  
Author(s):  
Di Zu ◽  
Zhongfei Xu ◽  
Ao Zhang ◽  
Haiyang Wang ◽  
Hehe Wei ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Formation Mechanism ◽  
Room Temperature ◽  
Oxygen Vacancies ◽  
Oxide Structure

A Mg/HCl infiltrated metal oxide structure was designed as a facile approach for implanting oxygen vacancies and H atoms into metal oxides.

Defect Control and Defect Engineering of Transition-metal Silicides

2006 ◽  
Vol 980 ◽  
Author(s):  
Haruyuki Inui ◽  
Katsushi Tanaka ◽  
Kyosuke Kishida
Keyword(s):  
Transition Metal ◽  
Thermoelectric Properties ◽  
Valence Electron ◽  
Vacancy Concentration ◽  
Relative Magnitude ◽  
Defect Engineering ◽  
Counting Rule ◽  
Substitutional Element ◽  
Metal Silicides ◽  
Defect Control

AbstractThe microstructure, defect structure and thermoelectric properties of two different semiconducting transition-metal silicides, ReSi1.75 and Ru2Si3 upon alloying with a substitutional element with a valence electron number different from that of the constituent metal have been investigated in order to see if the crystal and defect structures of these silicides and thereby their physical properties can be controlled through defect engineering according to the valence electron counting rule. The Si vacancy concentration and its arrangement can be successfully controlled in ReSi1.75 while the relative magnitude of the metal and silicon subcell dimensions in the chimney-ladder structures can be successfully controlled in Ru2Si3. As a result, the improvement in the thermoelectric properties and the p- to n-type conduction transition are successfully achieved respectively for these semiconducting transition-metal silicides.

scholarly journals Surface Oxygen Vacancies: Dynamics of Photo‐Induced Surface Oxygen Vacancies in Metal‐Oxide Semiconductors Studied Under Ambient Conditions (Adv. Sci. 22/2019)

2019 ◽  
Vol 6 (22) ◽  
pp. 1970132 ◽  
Author(s):  
Daniel Glass ◽  
Emiliano Cortés ◽  
Sultan Ben‐Jaber ◽  
Thomas Brick ◽  
William J. Peveler ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Oxygen Vacancies ◽  
Metal Oxide Semiconductors ◽  
Surface Oxygen ◽  
Ambient Conditions ◽  
Oxide Semiconductors

scholarly journals Oxygen Vacancy Enhanced Photoreduction Cr(VI) on Few-Layers BiOBr Nanosheets

Catalysts ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 558 ◽  
Author(s):  
Yin Peng ◽  
Pengfei Kan ◽  
Qian Zhang ◽  
Yinghua Zhou
Keyword(s):  
Oxygen Vacancies ◽  
Surface Defect ◽  
Photocatalytic Performance ◽  
Electrochemical Impedance ◽  
Light Irradiation ◽  
Solvothermal Reaction ◽  
Defect Engineering ◽  
High Concentration ◽  
Solar Light Irradiation ◽  
2D Nanomaterials

2D nanomaterials, with unique structural and electronic features, had been demonstrated as excellent photocatalysts, whose catalytic properties could be tunable with surface defect engineering. In this work, few-layer BiOBr nanosheets with oxygen vacancies (BiOBr-Ov) have been fabricated by a simple solvothermal reaction with the help of ethylene glycol. The obtained BiOBr-Ov exhibited the superior photocatalytic performance with a complete reduction of Cr(VI) (20 mg/L) within 12 min by visible light irradiation. Moreover, Cr(VI) with a high concentration (such as 30 mg/L) only requires 2 min to be photoreduced completely under solar light irradiation. The enhanced photocatalytic performance is contributed to the existence of oxygen vacancies. It has been proved by the results of electrochemical impedance and photocurrent that oxygen vacancies can effectively suppress recombination of photogenerated carriers.

scholarly journals Dynamics of Photo‐Induced Surface Oxygen Vacancies in Metal‐Oxide Semiconductors Studied Under Ambient Conditions

2019 ◽  
Vol 6 (22) ◽  
pp. 1901841 ◽  
Author(s):  
Daniel Glass ◽  
Emiliano Cortés ◽  
Sultan Ben‐Jaber ◽  
Thomas Brick ◽  
William J. Peveler ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Oxygen Vacancies ◽  
Metal Oxide Semiconductors ◽  
Surface Oxygen ◽  
Ambient Conditions ◽  
Oxide Semiconductors
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