Three-Dimensionally Ordered Macroporous MnxCe1–xOδ and Pt/Mn0.5Ce0.5Oδ Catalysts: Synthesis and Catalytic Performance for Soot Oxidation

Yu, Xin; Li, Jianmei; Wei, Yuechang; Zhang, Zhao; Liu, Jian; Jin, Baofang; Duan, Aijun; Jiang, Guiyuan

doi:10.1021/ie500666m

Cited by 86 publications

(34 citation statements)

References 55 publications

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“…Recent studies have produced a variety of colloid-based porous Ce-Zr binary oxides and composite structures incorporating metal NPs. 339,343,344 For example, Arandiyam et al fabricated 3D ordered macro/mesoporous Pt/Ce 0.6 Zr 0.3 Y 0.1 O 2 (CZY) catalysts for methane combustion using PMMA as hard template and pluronic (P123) as surfactant (Figure 24 A,B). 348 The excellent catalytic activity of Pt/CZY was ascribed to an increase in surface area due to its unique macro/mesoporous structure as well as its high concentration of adsorbed oxygen, good low-temperature reducibility, and strong catalyst-support interaction due to composition.…”

Section: Factors Influencing Cbpm Catalystsmentioning

confidence: 99%

A colloidoscope of colloid-based porous materials and their uses

et al. 2016

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Nature evolved a variety of hierarchical structures that produce sophisticated functions. Inspired by these natural materials, colloidal self-assembly provides a convenient way to produce structures from simple building blocks with a variety of complex functions beyond those found in nature. In particular, colloid-based porous materials (CBPM) can be made from a wide variety of materials. The internal structure of CBPM also has several key attributes, namely porosity on a sub-micrometer length scale, interconnectivity of these pores, and a controllable degree of order. The combination of structure and composition allow CBPM to attain properties important for modern applications such as photonic inks, colorimetric sensors, self-cleaning surfaces, water purification systems, or batteries. This review summarizes recent developments in the field of CBPM, including principles for their design, fabrication, and applications, with a particular focus on structural features and materials' properties that enable these applications. We begin with a short introduction to the wide variety of patterns that can be generated by colloidal self-assembly and templating processes. We then discuss different applications of such structures, focusing on optics, wetting, sensing, catalysis, and electrodes. Different fields of applications require different properties, yet the modularity of the assembly process of CBPM provides a high degree of tunability and tailorability in composition and structure. We examine the significance of properties such as structure, composition, and degree of order on the materials' functions and use, as well as trends in and future directions for the development of CBPM.

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Section: Factors Influencing Cbpm Catalystsmentioning

confidence: 99%

A colloidoscope of colloid-based porous materials and their uses

et al. 2016

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“…Interestingly, although the sample H 2 reduction peak temperature for FeCe‐SG is slightly higher than the sample FeCe‐MM, it has the largest H 2 reduction peak area, indicating that the sample consumes the most H 2 . Studies have shown that the reason for the poor selectivity of catalyst N 2 is that NH 3 is excessively oxidized at the active site, and excessive NH participates in the catalytic reaction to form a side reaction product N 2 O . However, FeCe‐SG samples consume more H 2 in this temperature range, and have a higher degree of oxidation, and may over oxidize NH 3 to NH.…”

Section: Resultsmentioning

confidence: 99%

Selective catalytic reduction of NO_x with NH₃ over iron‐cerium mixed oxide catalyst prepared by different methods

Tang

Gao

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Nitrogen oxide (NO x ) is one of the important atmospheric pollutants, causing damage to the environment and the human body. Currently, selective catalytic reduction (SCR) technology is the main denitration method, and SCR catalyst is the key to this technology. Iron (Fe)-based catalysts have recently been widely studied because of their low cost and good catalytic effect on medium and low temperature effects. In this article, iron-cerium mixed oxide (FeO x -CeO 2 ) catalysts were prepared by five common preparation methods, and their physicochemical properties and low temperature NH 3 -SCR catalytic activity were studied. RESULTS: The results show that the preparation method has a certain influence on the catalytic performance [activity and nitrogen (N 2 ) selectivity] of the catalyst. The order of activity is microemulsion method (MM) ≈ sol-gel (SG) method > coprecipitation method > hydrothermal synthesis method > solid-phase mixing (SPM) method.CONCLUSION: This result is related to the specific surface area of the catalyst, the microstructure, the valence distribution of the elements, the redox ability and the surface acidic sites. It is worth noting that the activity of the catalyst prepared by the SG method is good, but the selectivity of N 2 is poor, which is related to the oxidizing ability of the catalyst. The catalyst prepared by the MM has moderate oxidizing ability and large specific surface area, provides abundant acidic sites and has excellent catalytic performance.[J Chem Technol Biotechnol 2020; 95: 232-245

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“…50 PM combustion is a typically deep oxidation reaction, the intrinsic redox performance of catalysts plays a major role in PM oxidation. 37 Topsøe 51 proposed a catalytic cycle for the SCR reaction, referring to both acid-base and redox functions. Previous studies by Lietti et al indicated that the NH 3 -SCR catalyst with redox functions dominated the catalytic performance.…”

Section: The Results Of H 2 -Tpr and Nh 3 -Tpdmentioning

confidence: 99%

Simultaneous removal of PM and NO_x over highly efficient 3DOM W/Ce_0.8Zr_0.2O₂ catalysts

et al. 2017

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Three-Dimensionally Ordered Macroporous Mn_xCe_1–xO_δ and Pt/Mn_0.5Ce_0.5O_δ Catalysts: Synthesis and Catalytic Performance for Soot Oxidation

Cited by 86 publications

References 55 publications

A colloidoscope of colloid-based porous materials and their uses

A colloidoscope of colloid-based porous materials and their uses

Selective catalytic reduction of NO_x with NH₃ over iron‐cerium mixed oxide catalyst prepared by different methods

Simultaneous removal of PM and NO_x over highly efficient 3DOM W/Ce_0.8Zr_0.2O₂ catalysts

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Three-Dimensionally Ordered Macroporous MnxCe1–xOδ and Pt/Mn0.5Ce0.5Oδ Catalysts: Synthesis and Catalytic Performance for Soot Oxidation

Cited by 86 publications

References 55 publications

A colloidoscope of colloid-based porous materials and their uses

A colloidoscope of colloid-based porous materials and their uses

Selective catalytic reduction of NOx with NH3 over iron‐cerium mixed oxide catalyst prepared by different methods

Simultaneous removal of PM and NOx over highly efficient 3DOM W/Ce0.8Zr0.2O2 catalysts

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About

Three-Dimensionally Ordered Macroporous Mn_xCe_1–xO_δ and Pt/Mn_0.5Ce_0.5O_δ Catalysts: Synthesis and Catalytic Performance for Soot Oxidation

Selective catalytic reduction of NO_x with NH₃ over iron‐cerium mixed oxide catalyst prepared by different methods

Simultaneous removal of PM and NO_x over highly efficient 3DOM W/Ce_0.8Zr_0.2O₂ catalysts