Three-dimensionally ordered macroporous Cr2O3−CeO2: High-performance catalysts for the oxidative removal of trichloroethylene

Zhang, Xing; Liu, Yuxi; Deng, Jiguang; Zhao, Xingtian; Zhang, Kunfeng; Yang, Jun; Han, Zhuo; Jiang, Xiyun; Dai, Hongxing

doi:10.1016/j.cattod.2019.01.071

Cited by 43 publications

(11 citation statements)

References 66 publications

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“…After removing H 2 O, the catalyst recovered its activity, which was in accord with the activity in the second stage without H 2 O. The phenomenon is consistent with previous reports, [72] which indicates the water vapor only has a little inhibition for the conversion of CB (from 95 % to 92 %) over Co 3 O 4 ‐A for the first time. However, in the following anti‐moisture test, the catalytic performance can recover completely after the removal of water vapor (from 85 % to 92 %).…”

Section: Resultssupporting

confidence: 90%

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A Facile Method to Synthesize Co₃O₄ Catalyst for Efficient Chlorobenzene Combustion

Chen

et al. 2022

ChemistrySelect

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Preparation methods are essential for the synthesis of materials with diverse structures, which may lead to the different physicochemical properties. The activities of catalysts for volatile organic compounds (VOCs) combustion can be improved by optimizing the preparation methods. In this paper, a novel ammonium bicarbonate pyrolysis method is successfully applied to prepare Co3O4 catalyst (Co3O4‐A), which is not only facile in preparation, but also superior to the Co3O4 catalysts prepared by the hydrothermal, sol‐gel, MOFs pyrolysis and carbonate pyrolysis method in the performance of chlorobenzene catalytic oxidation with 90 % conversion and mineralization temperature at 310 and 325 °C, respectively (1000 ppm CB, Air, WHSV=60,000 mL ⋅ g−1 ⋅ h−1). Furthermore, Co3O4‐A catalyst can maintain high catalytic activity for a long time, and has high tolerance to water vapor, which indicates Co3O4‐A catalyst has a good potential application value in catalytic combustion of chlorobenzene.

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Section: Resultssupporting

confidence: 90%

Section: Chemistryselectsupporting

confidence: 91%

A Facile Method to Synthesize Co₃O₄ Catalyst for Efficient Chlorobenzene Combustion

Chen

et al. 2022

ChemistrySelect

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“…The former marked the formation of large pores in the material, and the latter indicated the presence of mesopores in the CoB 4 O 7 skeleton. 35 The pore sizes were predominantly distributed in the range of 50-200 nm and only a few pore distributions were in the range of 2-10 nm (see Fig. S2(a) †).…”

Section: Catalysis Science and Technology Papermentioning

confidence: 99%

Efficient metal borate catalysts for oxidative dehydrogenation of propane

Qian

Sun

Huang

et al. 2022

Catal. Sci. Technol.

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“…To date, two efficient strategies have been widely applied to improve the stabilization of active phases for the catalytic oxidation of Cl-VOCs, that is, the enhancement of oxidizing ability and the introduction of acid sites to transform chlorine species into Cl 2 or HCl, followed by enhanced chlorine desorption from the catalyst surface. − However, the modulation of these catalysts deteriorates their selectivity toward target products, such as CO 2 and HCl. Generally, their enhanced oxidizing ability is favorable to CO 2 formation but their high redox ability promotes the formation of additional polychlorinated byproducts. , In contrast, the introduction of acid sites, especially Brønsted acid sites, could inhibit the formation of polychlorinated byproducts and improve HCl selectivity but promotes the formation of incomplete oxidative products (such as CO and some hydro-dechlorinated byproducts). , Therefore, a desirable catalyst for the catalytic oxidation of Cl-VOCs should possess outstanding redox ability (to improve CO 2 selectivity and further oxidize the dechlorinated byproducts) and abundant surface acid sites (to inhibit the formation of polychlorinated byproducts and improve HCl selectivity). However, a constrained relationship exists between the redox and acid properties of all the catalysts available for the oxidation of Cl-VOCs, including transition metal oxides, supported noble metals, and solid acids, and hence, the modulation of these attributes remains a significant challenge.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, their enhanced oxidizing ability is favorable to CO their high redox ability promotes the formation of additional polychlorinated byproducts. 16,17 In contrast, the introduction of acid sites, especially Brønsted acid sites, could inhibit the formation of polychlorinated byproducts and improve HCl selectivity but promotes the formation of incomplete oxidative products (such as CO and some hydro-dechlorinated byproducts). 15,18 Therefore, a desirable catalyst for the catalytic oxidation of Cl-VOCs should possess outstanding redox ability (to improve CO 2 selectivity and further oxidize the dechlorinated byproducts) and abundant surface acid sites (to inhibit the formation of polychlorinated byproducts and improve HCl selectivity).…”

Section: Introductionmentioning

confidence: 99%

HCl-Tolerant H_xPO₄/RuO_x–CeO₂ Catalysts for Extremely Efficient Catalytic Elimination of Chlorinated VOCs

Dai

Shen

Deng

et al. 2021

Environ. Sci. Technol.

125

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Bulk metal doping and surface phosphate modification were synergically adopted in a rational design to upgrade the CeO2 catalyst, which is highly active but easily deactivated for the catalytic oxidation of chlorinated volatile organic compounds (Cl-VOCs). The metal doping increased the redox ability and defect sites of CeO2, which mostly promoted catalytic activity and inhibited the formation of dechlorinated byproducts but generated polychlorinated byproducts. The subsequent surface modification of the metal-doped CeO2 catalysts with nonmetallic phosphate completely suppressed the formation of polychlorinated byproducts and, more importantly, enhanced the stability of the surface structure by forming a chainmail layer. A highly active, durable, and selective catalyst of phosphate-functionalized RuO x –CeO2 was the most promising among all the metal-doped (Ru, Pd, Pt, Cr, Mn, Fe, Co, and Cu) CeO2 catalysts investigated owing to the prominent chemical stability of RuO x and its superior versatility in the catalytic oxidation of different kinds of Cl-VOCs and other typical pollutants, including dimethyl sulfide, CO, and C3H8. Moreover, the chemical stability of the catalyst, including its bulk and surface structural stability, was investigated by combining intensive treatment with HCl/H2O or HCl with subsequent ex situ ultraviolet–visible light Raman spectroscopy and confirmed the superior resistance to Cl poisoning of the phosphate-functionalized RuO x –CeO2. This work exemplifies a promising strategy for developing ideal catalysts for the removal of Cl-VOCs and provides a catalyst with the superior catalytic performance in Cl-VOC oxidation to date.

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Three-dimensionally ordered macroporous Cr2O3−CeO2: High-performance catalysts for the oxidative removal of trichloroethylene

Cited by 43 publications

References 66 publications

A Facile Method to Synthesize Co₃O₄ Catalyst for Efficient Chlorobenzene Combustion

A Facile Method to Synthesize Co₃O₄ Catalyst for Efficient Chlorobenzene Combustion

Efficient metal borate catalysts for oxidative dehydrogenation of propane

HCl-Tolerant H_xPO₄/RuO_x–CeO₂ Catalysts for Extremely Efficient Catalytic Elimination of Chlorinated VOCs

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Three-dimensionally ordered macroporous Cr2O3−CeO2: High-performance catalysts for the oxidative removal of trichloroethylene

Cited by 43 publications

References 66 publications

A Facile Method to Synthesize Co3O4 Catalyst for Efficient Chlorobenzene Combustion

A Facile Method to Synthesize Co3O4 Catalyst for Efficient Chlorobenzene Combustion

Efficient metal borate catalysts for oxidative dehydrogenation of propane

HCl-Tolerant HxPO4/RuOx–CeO2 Catalysts for Extremely Efficient Catalytic Elimination of Chlorinated VOCs

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A Facile Method to Synthesize Co₃O₄ Catalyst for Efficient Chlorobenzene Combustion

A Facile Method to Synthesize Co₃O₄ Catalyst for Efficient Chlorobenzene Combustion

HCl-Tolerant H_xPO₄/RuO_x–CeO₂ Catalysts for Extremely Efficient Catalytic Elimination of Chlorinated VOCs