Characterization of the defect structure of oxide nanoparticles with the use of deuterium probes

Выходец, В. Б.; Куренных, Т. Е.

doi:10.1039/c9ra05451k

Cited by 6 publications

(4 citation statements)

References 21 publications

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“…In addition, the concentration of oxygen defects near the surface is generally higher than in the bulk. [ 59 ] Therefore, the oxygen vacancy concentration on the surface of the LNCO55‐Ar sample is expected to be greater than 13%. As mentioned before, the LNCO55‐Air sample was inactive to AOR (Figure S4c , Supporting Information) and showed poor HER activity (Figure S14 , Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

An Efficient Symmetric Electrolyzer Based On Bifunctional Perovskite Catalyst for Ammonia Electrolysis

Zhang

Duan

et al. 2021

Advanced Science

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Ammonia is a natural pollutant in wastewater and removal technique such as ammonia electro-oxidation is of paramount importance. The development of highly efficient and low-costing electrocatalysts for the ammonia oxidation reaction (AOR) and hydrogen evolution reaction (HER) associated with ammonia removal is subsequently crucial. In this study, for the first time, the authors demonstrate that a perovskite oxide LaNi 0.5 Cu 0.5 O 3-𝜹 after being annealed in Ar (LNCO55-Ar), is an excellent non-noble bifunctional catalyst towards both AOR and HER, making it suitable as a symmetric ammonia electrolyser (SAE) in alkaline medium. In contrast, the LNCO55 sample fired in air (LNCO55-Air) is inactive towards AOR and shows very poor HER activity. Through combined experimental results and theoretical calculations, it is found that the superior AOR and HER activities are attributed to the increased active sites, the introduction of oxygen vacancies, the synergistic effect of B-site cations and the different active sites in LNCO55-Ar. At 1.23 V, the assembled SAE demonstrates ≈100% removal efficiency in 2210 ppm ammonia solution and >70% in real landfill leachate. This work opens the door for developments towards bifunctional catalysts, and also takes a profound step towards the development of low-costing and simple device configuration for ammonia electrolysers.

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Section: Resultsmentioning

confidence: 99%

An Efficient Symmetric Electrolyzer Based On Bifunctional Perovskite Catalyst for Ammonia Electrolysis

Zhang

Duan

et al. 2021

Advanced Science

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“…2 и 3, нужно иметь в виду, что короткие и даже более длительные отжиги порошков в дейтерии при 400 ºС не приводят к заметному изменению дефектной структуры YSZ10. Этот результат был получен в работе [10]. Это дает основания считать зависимости концентраций дейтерия C D от времени отжига на воздухе на рис.…”

Section: результаты и обсуждениеunclassified

“…Физико-химические и функциональные свойства нанопорошков в значительной мере определяются дефектной структурой наночастиц: концентрацией точечных дефектов, их типом и пространственным распределением [7][8][9]. Для их исследования применяется широкий набор методик, в том числе метод дейтериевых зондов (ДЗ) [10]. В его основе лежит тот факт, что при отжиге нанопорошков в дейтерии образуются кластеры, состоящие из атомов дейтерия и точечных дефектов.…”

Section: Introductionunclassified

Effect of low-temperature annealing in air on the defect structure of oxide nanoparticles

Vykhodets,

Kurennykh

2023

DREAM

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It has been found that low-temperature annealing in air changes the defect structure of YSZ10 oxide nanoparticles synthesized by means of the laser evaporation of a ceramic target. The study is carried out with the use of deuterium probes. At a temperature of 350 ℃, with increasing annealing time, a monotonic decrease in the concentration of oxygen vacancies near the surface of nanoparticles is observed. This dependence is extreme at 200 ℃; at its first stage, the concentration of vacancies in the surface atomic layer of nanoparticles increases with time. An approach is proposed for the synthesis of nanoparticles with severe oxygen deficiency near the surface of oxide

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“…-Possess same size scale as many biological molecules. [2,3,[12][13][14][15] Carbon nanotubes -Possess high thermal conductivity -Possess a remarkable electrical conductivity -Possess a remarkable mechanical property -Possess a large length-to-diameter ratio (aspect ratio) of higher than 1000 -The images of the actual space examination of nanotube have revealed a series of inter-stratum spacing -Single walled nanotube generally comprises of only 10 atoms near the circumference and the thickness of the tube is only one-atom thick [3,[16][17][18] Nanosheets -Exhibits high surface area that makes them advantageous for the fabrication of excellent reinforced polymeric composites -Their surfaces contain a large quantity of active oxygen-containing groups -Possess excellent mechanical and thermal conductivity properties -Possess excellent catalytic activities such as photo-/thermo-catalytic activity -Possess excellent thermal and electrical conductivity [5,6,[19][20][21] Nanofibers -Nanofibers are very small in size, which accords them outstanding physical and chemical properties -Possess huge surface area, high aspect ratio, and superior surface properties, which is responsible for their suitability for other technologies that need a smaller environment for chemical reaction to take place -Possess high pore volume and tight pore size that accords their suitability for an extensive range of filtration applications -Possess extreme adsorption capacity that has the capacity to improve many applications [4,[22][23][24] Meeting the demand and effectually making safe freshwater available is one of the utmost challenges globally. It forms a foremost menace to safe utilization of water, wellbeing, and trade and industry development [25].…”

Section: Nanomaterials Properties Referencesmentioning

confidence: 99%

A Review on Polymer Nanocomposites and Their Effective Applications in Membranes and Adsorbents for Water Treatment and Gas Separation

et al. 2021

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Globally, environmental challenges have been recognised as a matter of concern. Among these challenges are the reduced availability and quality of drinking water, and greenhouse gases that give rise to change in climate by entrapping heat, which result in respirational illness from smog and air pollution. Globally, the rate of demand for the use of freshwater has outgrown the rate of population increase; as the rapid growth in town and cities place a huge pressure on neighbouring water resources. Besides, the rapid growth in anthropogenic activities, such as the generation of energy and its conveyance, release carbon dioxide and other greenhouse gases, warming the planet. Polymer nanocomposite has played a significant role in finding solutions to current environmental problems. It has found interest due to its high potential for the reduction of gas emission, and elimination of pollutants, heavy metals, dyes, and oil in wastewater. The revolution of integrating developed novel nanomaterials such as nanoparticles, carbon nanotubes, nanofibers and activated carbon, in polymers, have instigated revitalizing and favourable inventive nanotechnologies for the treatment of wastewater and gas separation. This review discusses the effective employment of polymer nanocomposites for environmental utilizations. Polymer nanocomposite membranes for wastewater treatment and gas separation were reviewed together with their mechanisms. The use of polymer nanocomposites as an adsorbent for toxic metals ions removal and an adsorbent for dye removal were also discussed, together with the mechanism of the adsorption process. Patents in the utilization of innovative polymeric nanocomposite membranes for environmental utilizations were discussed.

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Characterization of the defect structure of oxide nanoparticles with the use of deuterium probes

Abstract: The method of using deuterium probes was proposed for studying the defect structure of oxide nanoparticles.

Cited by 6 publications

References 21 publications

An Efficient Symmetric Electrolyzer Based On Bifunctional Perovskite Catalyst for Ammonia Electrolysis

An Efficient Symmetric Electrolyzer Based On Bifunctional Perovskite Catalyst for Ammonia Electrolysis

Effect of low-temperature annealing in air on the defect structure of oxide nanoparticles

A Review on Polymer Nanocomposites and Their Effective Applications in Membranes and Adsorbents for Water Treatment and Gas Separation

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