High-efficient catalysts of core-shell structured Pt@transition metal oxides (TMOs) supported on 3DOM-Al2O3 for soot oxidation: The effect of strong Pt-TMO interaction

Wu, Qiong; Jing, Meizan; Wei, Yuechang; Zhang, Zhao; Zhang, Xindong; Xiong, Jing; Liu, Jian; Song, Wenli; Li, Jianmei

doi:10.1016/j.apcatb.2018.11.094

Cited by 121 publications

(72 citation statements)

References 54 publications

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“…The reason of two indices' increases is probably related to the physicochemical properties of the Pt/Al 2 O 3 catalyst [36,38]. Under N 2 /O 2 atmosphere, a small part of Pt atoms can interact with the anchor sites of five-coordinated Al 3+ ions on high content of Pt loading [39,40]. With the clustering of Pt particles, the active phase of CO is promoted, and the activity of the Pt catalyst increases due to the increased oxygen concentration [20,37,41].…”

Section: Influence Of Different Contents Of Pt On Soot Combustionmentioning

confidence: 99%

Influence of Different Thermal Aging Conditions on Soot Combustion with Catalyst by Thermogravimetric Analysis

et al. 2021

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Diesel particulates are deposited in the diesel particulate filter and removed by the regeneration process. The Printex-U (PU) particles are simulated as the diesel soot to investigate the influence of thermal aging conditions on soot combustion performance with the addition of catalysts. The comprehensive combustion index S, combustion stability index Rw and peak temperature Tp are obtained to evaluate the combustion performance. Compared with the PU/Pt mixtures of different Pt contents (2 g/ft3, 3.5 g/ft3, and 5 g/ft3), the 10 g/ft3 Pt contents improve soot combustion with the outstanding oxygen absorption ability. When the weight ratio of PU/Pt mixture is 1:1, the promoted effect achieves the maximum degree. The S and Rw increase to 8.90 × 10−8 %2min−2°C−3 and 39.11 × 105, respectively, compared with pure PU. After the thermal aging process, the PU/Pt mixture with a 350 °C aging temperature for 10 h promotes the soot combustion the best when compared to pure PU particles. It is not good as the PU/Pt mixture without aging, because the inner properties of soot and Pt/Al2O3 catalyst may have been changed. The S and Rw are 9.07 × 10−8 %2min−2°C−3 and 38.39 × 105, respectively, which are close to the no aging mixture. This work plays a crucial role in understanding the mechanism of the comprehensive effect of soot and catalyst on soot combustion after the thermal aging process.

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Section: Influence Of Different Contents Of Pt On Soot Combustionmentioning

confidence: 99%

Influence of Different Thermal Aging Conditions on Soot Combustion with Catalyst by Thermogravimetric Analysis

et al. 2021

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“…As the result, it is the most commonly used method for fabricating 3DOM materials [18]. Generally, the preparation of 3DOM materials by CCT method includes the following four steps [19,20]: (1) Synthesis of monodisperse colloidal microspheres; (2) Assembly of monodisperse colloidal microspheres into opal-structured CCT by appropriate methods; (3) Filling and solidifying the voids between the microspheres by appropriate precursor; (4) Calcination to form the skeleton and removing the template. In order to fabricate 3DOM materials with mesoporous walls, the surfactant-assisted method is used, in which surfactants are added into the precursor solution.…”

Section: Fabrication Of 3dom Perovskite Materialsmentioning

confidence: 99%

“…Consequently, the composition and physicochemical properties of precursor solutions, such as pH and viscosity, are more important. The precursor should be able to (1) fill the voids between the microspheres sufficiently, (2) convert into the desired materials through appropriate reaction, (3) should not interfere with the skeleton structure during the CCT removal process and (4) solidify before the glass transition temperature (Tg) of the polymer sphere template [35]. Various materials can be used as precursors, including metal alkoxides, inorganic salts, dispersed nano-microcrystalline particles, and other organic compounds.…”

Section: Fabrication Of 3dom Perovskite Materialsmentioning

confidence: 99%

“…In recent years, three-dimensionally ordered macroporous (3DOM) materials, also known as inverse opal materials, have been widely studied by researchers worldwide [1][2][3][4]. The 3DOM materials possess general features of macroporous material, such as large surface area, high porosity, large pore volume and excellent mass transfer ability.…”

Section: Introductionmentioning

confidence: 99%

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Three-dimensionally ordered macroporous perovskite materials for environmental applications

Zhang

Zhao

Liu

et al. 2019

Chinese Journal of Catalysis

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Three-dimensionally ordered macroporous (3DOM) perovskite materials have attracted the interest from researchers worldwide due to their unique macroporous structure, flexible composition, tailorable physicochemical property, high stability and biocompatibility. In particular, they were widely used in environmental field, such as photocatalysis, catalytic combustion, catalytic oxidation and sensors. In this review, the recent progresses in the synthesis of 3DOM perovskite materials and their environmental applications are summarized. The advantages and the promoting mechanisms of 3DOM perovskite materials for different applications are discussed in detail. Subsequently, the challenges and perspectives on the topic are proposed.

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“…In recent years, considering the economy of catalyst cost, a number of rare earth oxides and transition metals have been studied for soot combustion [20,[24][25][26]. MnO x -CeO 2 mixed oxides with Mn and Ce synergistic effects have become one of the low cost and high performance catalysts [27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Preparation of K Modified Three-Dimensionally Ordered Macroporous MnCeOx/Ti0.7Si0.3O2 Catalysts and Their Catalytic Performance for Soot Combustion

Zhang

Peng

et al. 2021

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Soot particles in diesel engine exhaust is one of the main reasons for hazy weather and elimination of them is urgent for environmental protection. At present, it is still a challenge to develop new catalysts with high efficiency and low cost. In this paper, a kind of K modified three-dimensionally ordered macroporous (3DOM) MnCeOx/Ti0.7Si0.3O2 catalysts are designed and synthesized by a sample method. Due to the macroporous structure and synergistic effect of K, Mn, and Ce, the KnMnCeOx/Ti0.7Si0.3O2 (KnMnCeOx/M-TSO) catalysts exhibit good catalytic performance for soot combustion. The catalytic activity of K0.5MnCeOx/M-TSO was the best, and the T10, T50, and T90 are 287, 336, and 367 °C, respectively. After the prepared catalyst was doped with K, the physicochemical properties and catalytic performance changed significantly. In addition, the K0.5MnCeOx/M-TSO catalyst also somewhat exhibits sulfur tolerance owing to it containing Ti. Because of its simple synthesis, high activity, and low cost, the prepared KnMnCeOx/M-TSO catalysts are regarded as a promising candidate for application.

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High-efficient catalysts of core-shell structured Pt@transition metal oxides (TMOs) supported on 3DOM-Al2O3 for soot oxidation: The effect of strong Pt-TMO interaction

Cited by 121 publications

References 54 publications

Influence of Different Thermal Aging Conditions on Soot Combustion with Catalyst by Thermogravimetric Analysis

Influence of Different Thermal Aging Conditions on Soot Combustion with Catalyst by Thermogravimetric Analysis

Three-dimensionally ordered macroporous perovskite materials for environmental applications

Preparation of K Modified Three-Dimensionally Ordered Macroporous MnCeOx/Ti0.7Si0.3O2 Catalysts and Their Catalytic Performance for Soot Combustion

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