Facile synthesis of highly thermal-stable doped alumina with high surface area by low temperature solid-state reaction

Ni, Huan; Guo, Yun; Wang, Li; Guo, Yanglong; Wang, Zhan; Lu, Guanzhong

doi:10.1016/j.powtec.2017.03.038

Cited by 14 publications

(3 citation statements)

References 31 publications

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“…It was noted that the TPD profiles for xP-OMA(800) carriers were similar in shape (Figure 5A), which exhibited a broad NH 3 -desorption peak with a maximum temperature of around 278 °C attributed to the medium-strength acidic sites. 40,41 It was observed that the temperatures of desorption peaks were close in spite of addition of P, indicating that P doping had little influence on the acidic site strength, which may be due to alumina species being mostly amorphous, leading to this delicate difference. According to the desorbed NH 3 amounts (Table S2 in the Supporting Information), P doping affected the amount of surface acidity, which were gradually increased with increasing the P content.…”

Section: Acs Catalysismentioning

confidence: 99%

Catalytic Activity and Stability over Nanorod-Like Ordered Mesoporous Phosphorus-Doped Alumina Supported Palladium Catalysts for Methane Combustion

et al. 2018

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Nanorod-like phosphorus-doped ordered mesoporous γ-alumina (OMA), which has abundant ordered pore channels in the nanorods, was rapidly synthesized through a modified sol–gel strategy without use of any mineral acids. Highly dispersed Pd-based catalysts were synthesized by taking as-obtained phosphorus-doped OMA materials as carriers for methane combustion. The crystallization temperature of γ-Al2O3 was increased by phosphorus doping. The surface acidity properties of γ-Al2O3 were modified upon phosphorus incorporation, which had a significant effect on catalyst activities, and this influence was much more conspicuous for the supports calcined at high temperature. The incorporation of phosphorus adjusted the distribution of palladium active species and the reducibility of catalysts, synergistically affecting the low-temperature catalytic performance. Pd/6P-OMA catalyst demonstrated enhanced low-temperature catalytic properties and stability in the 13-cycle stability and long-term stability tests. During the reaction cycles, the total CH4 conversion temperature for Pd/6P-OMA catalyst was as low as 345 °C, which could be reduced to 321 °C via hydrogen reduction treatment. In comparison with the catalyst without dopant, the Pd/6P-OMA catalyst also exhibited higher hydrothermal stability in the presence of excess water vapor in the feed.

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Section: Acs Catalysismentioning

confidence: 99%

Catalytic Activity and Stability over Nanorod-Like Ordered Mesoporous Phosphorus-Doped Alumina Supported Palladium Catalysts for Methane Combustion

et al. 2018

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“…The latter problem is usually solved by an addition of the binding agents into the initial composition in order to provide its better adhesion and mounting on the cordierite surface. Stabilization of the oxide supports and improvement of their thermal stability can be done by doping with La2O3, ZrO2 and some other oxides [8][9][10]. It should be mentioned here that one of the most important properties for the three-way catalysis is its oxygen storage capacity (OSC).…”

Section: Introductionmentioning

confidence: 99%

New Trends in Automotive Exhaust Gas Purification Materials: Improvement of the Support against Stability of the Active Components

Vedyagin

Stoyanovskii

Kenzhin

et al. 2019

MSF

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Lanthanum and zirconium oxides are well known to be applied as an additive to improve the properties of the commercial alumina. Such modified aluminas are widely used in different catalytic fields including three-way catalysis. In the present research we have paid attention to the possible effects of the doping on the catalytic performance and stability of bimetallic Pd-Rh catalysts. The samples were prepared via an incipient wetness impregnation of the commercial supports, tested in CO oxidation under prompt thermal aging regime and characterized by physicochemical methods.

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“…One of the promising types of nanoscale materials are composites based on aluminum oxide and hydroxide nanosheets, due to their thermal stability, low cost, well-developed porosity, high absorption capacity, controllable surface concentration of acidic and basic centers and low toxicity. [5][6][7] Specically, novel anticancer and antimicrobial agents can be developed by using nanoscale AlOOH as a platform for the attachment of bactericidal metals or metals that affect cellular functions.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of antimicrobial AlOOH–Ag composite nanostructures by water oxidation of bimetallic Al–Ag nanoparticles

et al. 2018

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Facile synthesis of highly thermal-stable doped alumina with high surface area by low temperature solid-state reaction

Cited by 14 publications

References 31 publications

Catalytic Activity and Stability over Nanorod-Like Ordered Mesoporous Phosphorus-Doped Alumina Supported Palladium Catalysts for Methane Combustion

Catalytic Activity and Stability over Nanorod-Like Ordered Mesoporous Phosphorus-Doped Alumina Supported Palladium Catalysts for Methane Combustion

New Trends in Automotive Exhaust Gas Purification Materials: Improvement of the Support against Stability of the Active Components

Synthesis of antimicrobial AlOOH–Ag composite nanostructures by water oxidation of bimetallic Al–Ag nanoparticles

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