Facet‐Dependent Activity of Co3O4 Catalyst for C3H8 Combustion

Yao, Junxuan; Shi, Hui; Sun, Duixiong; Lu, Haijun; Hou, Bo; Jia, Litao; Xiao, Yong; Li, Debao

doi:10.1002/cctc.201901382

Cited by 42 publications

(13 citation statements)

References 66 publications

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“…Mn can be doped into the (100) surfaces of Co 3 O 4 , but cannot be doped into (111) surfaces. [26][27][28] It can be only excessively accumulated on the (111) surfaces. Due to the Mn doping into the (100) surfaces of the Co 3 O 4 , Mn 3+ partially replaces Co 3+ , resulting in lattice expansion.…”

Section: Resultsmentioning

confidence: 99%

Defect‐Rich Hierarchical Porous Mn‐Doped CoP Hollow Microspheres Accelerate Polysulfide Conversion

Zhou

Wang

et al. 2022

Adv Funct Materials

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Lithium-sulfur batteries (LSBs) with high theoretical specific capacities have been regarded as the development direction of next generation energy storage. However, the shuttle effect of lithium polysulfides (LiPSs) and the retardation of conversion kinetics have hindered their industrial application. Herein, Mn selectively doped CoP hollow microspheres are designed and synthesized to trap LiPSs and enhance Li-S reaction kinetics. Mn is successfully doped into (100) surfaces of Co 3 O 4 via simple hydrothermal reaction, whereas it is only excessively accumulated on (111) surfaces. The unique selective doping of Mn not only provides an accurate and controllable synthesis path, but also makes synthesized target products rich in phosphorus defects after thermal shock. The adsorption, electrochemical, and in situ XRD and Raman tests prove its enhancement in adsorption capacity for LiPSs and inhibition of shuttle effect. Meanwhile, density functional theory calculations confirm that the reduced reaction energy barriers accelerate the reduction kinetics of sulfur redox conversion. Therefore, the optimal electrode displays an outstanding cycling stability with a capacity fading rate of just 0.0207% per cycle over 1000 cycles at 1 C. This study provides a novel design to promote the practical use of LSBs by introducing lattice defects, enlightening further developments of LSBs.

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Section: Resultsmentioning

confidence: 99%

Defect‐Rich Hierarchical Porous Mn‐Doped CoP Hollow Microspheres Accelerate Polysulfide Conversion

Zhou

Wang

et al. 2022

Adv Funct Materials

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“…In a similar study, Co 3 O 4 was prepared through a solid-state method to reach a propane conversion of 50%, at reaction temperatures higher than 210 °C [ 39 ]. In another work, it was demonstrated that the catalytic activity of Co 3 O 4 catalysts was facet-dependent, reaching 90% conversion at 239 °C in the best cases [ 25 ]. The effect of pH in the synthesis of cobalt oxide has been also studied on the catalytic performance in propane total oxidation.…”

Section: Resultsmentioning

confidence: 99%

“…Several studies have investigated transition metal oxide catalysts and demonstrated that oxides of manganese [ 16 , 17 , 18 ] or cobalt are also highly active [ 19 , 20 , 21 , 22 , 23 ]. In fact, Co 3 O 4 presents a catalytic activity for total oxidation of alkanes (the least reactive VOCs) comparable or even greater than those of noble metal- based catalysts [ 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Highly Active Co3O4-Based Catalysts for Total Oxidation of Light C1–C3 Alkanes Prepared by a Simple Soft Chemistry Method: Effect of the Heat-Treatment Temperature and Mixture of Alkanes

et al. 2021

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In the present work, a simple soft chemistry method was employed to prepare cobalt mixed oxide (Co3O4) materials, which have shown remarkably high activity in the heterogeneously catalyzed total oxidation of low reactive VOCs such as the light alkanes propane, ethane, and methane. The optimal heat-treatment temperature of the catalysts was shown to depend on the reactivity of the alkane studied. The catalytic activity of the Co3O4 catalysts was found to be as high as that of the most effective catalysts based on noble metals. The physicochemical properties, from either the bulk (using XRD, TPR, TPD-O2, and TEM) or the surface (using XPS), of the catalysts were investigated to correlate the properties with the catalytic performance in the total oxidation of VOCs. The presence of S1 low-coordinated oxygen species at the near surface of the Co3O4-based catalysts appeared to be linked with the higher reducibility of the catalysts and, consequently, with the higher catalytic activity, not only per mass of catalyst but also per surface area (enhanced areal rate). The co-presence of propane and methane in the feed at low reaction temperatures did not negatively affect the propane reactivity. However, the co-presence of propane and methane in the feed at higher reaction temperatures negatively affected the methane reactivity.

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“…The exposure of different crystal planes on metal oxides will lead to great differences in catalytic activity because different facets usually have dissimilar atomic arrangements, electronic structures, and surface active sites. − Therefore, the investigation of the crystal facets is not only of great significance to the in-depth study of VOCs degradation mechanism but also can reasonably guide the design and synthesis of high-performance catalysts to meet industrial needs.…”

Section: Design Strategies Of Spinel Catalystmentioning

confidence: 99%

Recent Advances of VOCs Catalytic Oxidation over Spinel Oxides: Catalyst Design and Reaction Mechanism

Shan

Wang

et al. 2023

Environ. Sci. Technol.

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Volatile organic compounds (VOCs) harm the environment and human health and have been of wide concern and purified efficiently by catalytic oxidation. Spinel oxides, mainly composed of transition metal elements with low price and extensive sources, have been widely investigated as efficient and stable catalysts for VOCs oxidation due to their adjustable element composition, flexible structure, and high thermal/chemical stability. However, it is necessary to dissect the design of the spinel in a targeted way to satisfy the removal of different types of VOCs. This article systematically summarizes the recent advances regarding the application of spinel oxides for VOCs catalytic oxidation. Specifically, the design strategies of spinel oxides were first introduced to clarify their effect on the structure and properties of the catalyst. Then the reaction mechanism and degradation pathway of different kinds of VOCs on the spinel oxides were in detail summarized, and the characteristic requirements of the spinel oxides for various VOCs purification were analyzed. Furthermore, the practice applications were also discussed. Finally, the prospects were proposed to guide the rational design of spinel-based catalysts for VOCs purification and intensify the understanding of reaction mechanisms.

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Facet‐Dependent Activity of Co₃O₄ Catalyst for C₃H₈ Combustion

Cited by 42 publications

References 66 publications

Defect‐Rich Hierarchical Porous Mn‐Doped CoP Hollow Microspheres Accelerate Polysulfide Conversion

Defect‐Rich Hierarchical Porous Mn‐Doped CoP Hollow Microspheres Accelerate Polysulfide Conversion

Highly Active Co3O4-Based Catalysts for Total Oxidation of Light C1–C3 Alkanes Prepared by a Simple Soft Chemistry Method: Effect of the Heat-Treatment Temperature and Mixture of Alkanes

Recent Advances of VOCs Catalytic Oxidation over Spinel Oxides: Catalyst Design and Reaction Mechanism

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