Rapidly engineering the electronic properties and morphological structure of NiSe nanowires for the oxygen evolution reaction

2017 ◽  
Vol 5 (48) ◽  
pp. 25494-25500 ◽  
Author(s):  
Yunxiao Li ◽  
Dafeng Yan ◽  
Yuqin Zou ◽  
Chao Xie ◽  
Yanyong Wang ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Electronic Properties ◽  
Exchange Reaction ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Morphological Structure ◽  
Core Shell ◽  
Fast Method ◽  
Ion Exchange Reaction

We report an extremely simple and fast method to synthesize a NixFe1−xSe@Ni(Fe)OOH core–shell nanostructure with a nanosheet shell by a facile solvothermal selenization and ion exchange reaction.

γ-Irradiation route to photoluminescent CdS–CdSe with core–shell nanostructures under ambient conditions

2003 ◽  
Vol 81 (5) ◽  
pp. 381-384 ◽  
Author(s):  
Fen Xu ◽  
Xu Zhang ◽  
Jun Lu ◽  
Wang Xi ◽  
Jie Hong ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Ion Exchange ◽  
Exchange Reaction ◽  
Photoelectron Spectroscopy ◽  
Ambient Pressure ◽  
Core Shell ◽  
Ambient Conditions ◽  
Γ Irradiation ◽  
X Ray ◽  
Ion Exchange Reaction

Photoluminescent CdS–CdSe nanocomposites with core–shell structures were obtained via a novel two-step γ-irradiation process followed by a simple ion-exchange reaction at room temperature and under ambient pressure. To fully characterize CdS–CdSe nanocomposites, X-ray photoelectron spectroscopy, UV–vis absorption spectra, and photoluminescence spectra were recorded, as well as powder X-ray diffraction, transmission electron microscopy, and high-resolution electron microscopy, to confirm the presence of the core–shell nanostructure.Key words: core–shell nanostructure, γ-irradiation, ion-exchange reaction.

Photoassisted Production of O2-• and H2 in Aqueous Medium Stimulated by Polythiophene in ZSM-5 Zeolite Channels

1999 ◽  
Vol 64 (1) ◽  
pp. 149-156 ◽  
Author(s):  
Gabriel Čík ◽  
František Šeršeň ◽  
Alena Bumbálová
Keyword(s):  
Reactive Oxygen Species ◽  
Ion Exchange ◽  
Visible Light ◽  
Aqueous Medium ◽  
Exchange Reaction ◽  
Epr Spectroscopy ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Water Reduction ◽  
Ion Exchange Reaction

The formation of reactive oxygen species due to irradiation by a visible light of the polythiophene deposited in ZSM-5 zeolite channels in aqueous medium has been studied. Polymerization of thiophene was carried out in zeolite channels after the ion-exchange reaction of Na+ for Fe3+. By means of EPR spectroscopy, the temporarily generated 1O2 in irradiated aqueous medium was proved. The formation of O2-• was confirmed by the reduction of Fe3+-cytochrome c. Irradiation led to the water reduction to hydrogen.

Ion-biosorption induced core–shell Fe2P@carbon nanoparticles decorated on N, P co-doped carbon materials for the oxygen evolution reaction

2021 ◽  
Author(s):  
Min Jiang ◽  
Wei Fan ◽  
Anquan Zhu ◽  
Pengfei Tan ◽  
Jianping Xie ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Carbon Nanoparticles ◽  
Carbon Materials ◽  
Cost Effective ◽  
Core Shell ◽  
Co Doped

This work employs bacteria as precursors and induces a cost-effective biosorption strategy to obtain Fe2P@carbon nanoparticles decorated on N and P co-doped carbon (Fe2P@CNPs/NPC) materials.

Insight into the enhanced photocatalytic properties of AgBr/Ag4P2O7 composites synthesized via in situ ion exchange reaction

2021 ◽  
Vol 9 (1) ◽  
pp. 104889
Author(s):  
Wyllamanney da S. Pereira ◽  
Fabrício B. Destro ◽  
Cipriano B. Gozzo ◽  
Edson R. Leite ◽  
Júlio C. Sczancoski
Keyword(s):  
Ion Exchange ◽  
Exchange Reaction ◽  
Photocatalytic Properties ◽  
Ion Exchange Reaction ◽  
Insight Into

scholarly journals Possibility of Superconductivity in a Layered Perovskite Niobate, KCa2Nb3O10, Synthesized by an Ion Exchange Reaction

2006 ◽  
Vol 114 (1334) ◽  
pp. 861-865 ◽  
Author(s):  
Sachi TAKEZAWA ◽  
Takashi TERANISHI ◽  
Hironori ISHIKAWA ◽  
Toshiaki TOKUMITSU ◽  
Kenji TODA ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Exchange Reaction ◽  
Layered Perovskite ◽  
Ion Exchange Reaction

Heterostructure of core-shell IrCo@IrCoOx as efficient and stable catalysts for oxygen evolution reaction

2021 ◽  
Author(s):  
Xiaoping Ma ◽  
Lili Deng ◽  
Manting Lu ◽  
Yi He ◽  
Shuai Zou ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Noble Metal ◽  
Oxygen Evolution Reaction ◽  
Proton Exchange Membrane ◽  
Precious Metals ◽  
Life Time ◽  
Proton Exchange ◽  
Core Shell ◽  
Large Current ◽  
Amorphous Metal Oxide

Abstract Although researches on non-noble metal electrocatalysts have been made some progress recently, their performance in proton exchange membrane water electrolyzer (PEMWE) is still incomparable to that of noble-metal-based catalysts. Therefore, it is a more practical way to improve the utilization of precious metals in electrocatalysts for oxygen evolution reaction (OER) in the acidic medium. Herein, nanostructured IrCo@IrCoOx core-shell electrocatalysts composed of IrCo alloy core and IrCoOx shell were synthesized through a simple colloidally synthesis and calcination method. As expected, the hybrid IrCo-200 NPs with petal-like morphology show the best OER activities in acidic electrolytes. They deliver lower overpotential and better electrocatalytic kinetics than pristine IrCo alloy and commercial Ir/C, reaching a low overpotential (j = 10 mA/cm2) of 259 mV (vs. RHE) and a Tafel slope of 59 mV dec−1. The IrCo-200 NPs displayed robust durability with life time of about 55 h in acidic solution under a large current density of 50 mA/cm2. The enhanced electrocatalytic activity may be associated with the unique metal/amorphous metal oxide core-shell heterostructure, allowing the improved charge transferability. Moreover, the *OH-rich amorphous shell functions as the active site for OER and prevents the further dissolution of the metallic core and thus ensures high stability.

Top-down fabrication of Ti doped BiVO4 nanosheets for efficient water oxidation under visible light

2021 ◽  
Author(s):  
Bei Peng ◽  
Yawen Shi ◽  
Xin Zhang ◽  
Peiwen Lv
Keyword(s):  
Solid State ◽  
Ion Exchange ◽  
Visible Light ◽  
Exchange Reaction ◽  
Solid State Reaction ◽  
Water Oxidation ◽  
Photocatalytic Properties ◽  
Top Down ◽  
Ion Exchange Reaction

BiVO4 is one of the fascinating materials with excellent photocatalytic properties. A top-down approach composed of solid state reaction and ion exchange reaction is introduced to fabricate Ti doped BiVO4...

Adjustment engineering in the surface morphology structure and electronic properties of TCNQ-based nanoarrays for oxygen evolution reaction

2019 ◽  
Vol 236 ◽  
pp. 346-349 ◽  
Author(s):  
Jiaxin Wang ◽  
Wenchao Zhang ◽  
Zilong Zheng ◽  
Jingping Liu ◽  
Chunpei Yu ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Electronic Properties ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction
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