Sc2CO2 and Mn-doped Sc2CO2 as gas sensor materials to NO and CO: A first-principles study

Yang, Danxi; Fan, Xiaoli; Zhao, Dongxiang; An, Yurong; Hu, Yan; Luo, Zhifen

doi:10.1016/j.physe.2019.02.019

Cited by 72 publications

(32 citation statements)

References 52 publications

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“…In addition to Ti 3 C 2 T X , other MXene NSs, especially V 4 C 3 T x and V 2 CT x , have been studied for gas sensing applications. 23,332 The detection limits of V 2 CT x to CH 4 and H 2 were found to be 9 and 1 ppm, respectively. 277 Recently, V 4 C 3 T x was used as a sensor for the selective detection of acetone and exhibited a LOD of B1 ppm because of the difference in adsorption energy.…”

Section: Mxenes For Co 2 Conversionmentioning

confidence: 94%

A strategic review of MXenes as emergent building blocks for future two-dimensional materials: recent progress and perspectives

2022

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Section: Mxenes For Co 2 Conversionmentioning

confidence: 94%

A strategic review of MXenes as emergent building blocks for future two-dimensional materials: recent progress and perspectives

2022

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“…In addition to HER, other catalytic processes of M‐doped M 2 C compounds have been calculated such as CO adsorption, [ 140 ] CO oxidation, [ 135,136 ] oxygen evolution reaction (OER), [ 138,141 ] oxygen reduction reaction (ORR), [ 130,141 ] and nitrogen reduction reaction (NRR). [ 127 ] The M‐doped MXenes are sensitive to small molecules such as NO and CO. As shown in Figure a, the distances between adsorbed CO and Mn‐doped M 2 CO 2 are in the order of Sc 2 CO 2 < Hf 2 CO 2 < Zr 2 CO 2 < Ti 2 CO 2 , demonstrating strong adsorption of CO molecules for Mn‐doped Sc 2 CO 2 .It should be noted that good adsorption is not only a condition for the application of gas sensors since the detection of a gas molecule is dependent on a measurable property variation.…”

Section: Theoretical Calculations Of Elemental Doping/substitutingmentioning

confidence: 99%

“…Therefore, Mn‐doped Sc 2 CO 2 is proved to be a promising material for gas sensors based on measuring the change of resistance. [ 140 ] In order to realize the practical applications, other parameters of gas sensors should be taken into consideration such as response/recovery time, desorption speed, and long‐term cycling stability, that also can be tuned by the compositional engineering. Moreover, the CO oxidation reaction on MXenes can be promoted by elemental doping/substituting.…”

Section: Theoretical Calculations Of Elemental Doping/substitutingmentioning

confidence: 99%

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Hetero‐MXenes: Theory, Synthesis, and Emerging Applications

et al. 2021

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Since their discovery in 2011, MXenes (abbreviation for transition metal carbides, nitrides, and carbonitrides) have emerged as a rising star in the family of 2D materials owing to their unique properties. Although the primary research interest is still focused on pristine MXenes and their composites, much attention has in recent years been paid also to MXenes with diverse compositions. To this end, this work offers a comprehensive overview of the progress on compositional engineering of MXenes in terms of doping and substituting from theoretical predictions to experimental investigations. Synthesis and properties are briefly introduced for pristine MXenes and then reviewed for hetero‐MXenes. Theoretical calculations regarding the doping/substituting at M, X, and T sites in MXenes and the role of vacancies are summarized. After discussing the synthesis of hetero‐MXenes with metal/nonmetal (N, S, P) elements by in situ and ex situ strategies, the focus turns to their emerging applications in various fields such as energy storage, electrocatalysts, and sensors. Finally, challenges and prospects of hetero‐MXenes are addressed. It is anticipated that this review will be beneficial to bridge the gap between predictions and experiments as well as to guide the future design of hetero‐MXenes with high performance.

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“…In order to further explore the performance of CO-SCR denitrification, Shen et al [187] found that the operating temperature window moved towards low temperature after Fe co-doping with Mn-Ce/TiO 2 . Yang et al [193] studied the application of gas sensor in denitrification.Chen et al [194] studied the CO+NO reaction on Pd/Al 2 O 3 and Pd/CeZrO 2 catalysts. Cheng et al [195] prepared Pd/LaFeO 3 nanoparticle catalysts supported on LaFeO 3 by two-step precipitation-deposition method.…”

Section: Co-scrmentioning

confidence: 99%

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

Liu

et al. 2019

Catalysts

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Nitrogen oxides (NO x ) represent one of the main sources of haze and pollution of the atmosphere as well as the causes of photochemical smog and acid rain. Furthermore, it poses a serious threat to human health. With the increasing emission of NO x , it is urgent to control NO x . According to the different mechanisms of NO x removal methods, this paper elaborated on the adsorption method represented by activated carbon adsorption, analyzed the oxidation method represented by Fenton oxidation, discussed the reduction method represented by selective catalytic reduction, and summarized the plasma method represented by plasma-modified catalyst to remove NO x . At the same time, the current research status and existing problems of different NO x removal technologies were revealed and the future development prospects were forecasted.Catalysts 2019, 9, 771 2 of 39 adsorption, oxidation, reduction, and plasma methods. In view of these attentive findings, adsorption method uses recyclable solid adsorbent material to adsorb NO x from flue gas through microporous structure, remarkably, environmentally friendly, no secondary pollution, and energy-saving and -efficient features make it stand out [18][19][20]. The oxidation process is a method that oxidizes NO into NO 2 or N 2 O 3 with high solubility under the action of an oxidant that is then absorbed by water or alkali solution. The process is simple and cost-saving, and is widely used in the wet flue gas denitrification process with relatively low cost and high removal efficiency of NO x ; except that the oxidized NO and SO 2 can be removed simultaneously to produce high value-added products [21][22][23]. The reduction method has the characteristics of high efficiency, cleanliness, and mildness; NO x removal can be realized at low temperature at present [24][25][26]. The plasma method is used to modify the surface of the catalyst, the dispersion of active species can be improved by plasma treatment, and the stability and low temperature activity of catalyst can be improved [27,28].Seldom, if ever, does a comprehensive article to introduce the current situation and treatment methods of removing NO x . In this paper, we tried to renovate, classify, and summarize the significant perspectives and most relevant findings reported in recent research articles and earlier reviews generalizing the mechanism analysis and research progress of NO x removal by adsorption, oxidation, reduction, and plasma methods, which can provide means for promoting the technological progress of pollution prevention, maintaining healthy development of factories continuously, studying the methods of removing NO x deeply, and mastering different technologies of removing NO x , as well as providing guidance for controlling the emission of NO x from motor vehicles such as diesel, gasoline, and so on. In order to improve the environmental quality and save the ecological environment, this paper further provides a convenient, low-cost, efficient, and economic guidance line.

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Sc2CO2 and Mn-doped Sc2CO2 as gas sensor materials to NO and CO: A first-principles study

Cited by 72 publications

References 52 publications

A strategic review of MXenes as emergent building blocks for future two-dimensional materials: recent progress and perspectives

A strategic review of MXenes as emergent building blocks for future two-dimensional materials: recent progress and perspectives

Hetero‐MXenes: Theory, Synthesis, and Emerging Applications

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

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