A facile strategy of enhancing interaction between cerium and manganese oxides for catalytic removal of gaseous organic contaminants

Jin, Chen; Chen, Xi; Yan, Dongxu; Jiang, Mao Fa; Xu, Wenjian; Yu, Hao; Jia, Hongpeng

doi:10.1016/j.apcatb.2019.03.042

Cited by 140 publications

(58 citation statements)

References 61 publications

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“…The combination of MnO x with PAN-ACNF induced synergic effects on the formaldehyde removal performance, which doubly improved the performance of PAN-ACNF in either dry or humid conditions without UV light. The manganese oxides were also interacted with cerium oxide [68] and CoAl mixed oxides [69] for a better catalytic removal of gaseous VOCs.…”

Section: Methodsmentioning

confidence: 99%

A Review on Catalytic Nanomaterials for Volatile Organic Compounds VOC Removal and Their Applications for Healthy Buildings

Shah

2019

Nanomaterials

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In order to improve the indoor air quality, volatile organic compounds (VOCs) can be removed via an efficient approach by using catalysts. This review proposed a comprehensive summary of various nanomaterials for thermal/photo-catalytic removal of VOCs. These representative materials are mainly categorized as carbon-based and metallic oxides materials, and their morphologies, synthesis techniques, and performances have been explained in detail. To improve the indoor and outdoor air quality, the catalytic nanomaterials can be utilized for emerging building applications such as VOC-reduction coatings, paints, air filters, and construction materials. Due to the characteristics of low cost, non-toxic and high chemical stability, metallic oxides such as TiO2 and ZnO have been widely investigated for decades and dominate the application market of VOC-removal catalyst in buildings. Since other catalysts also showed brilliant performance and have been theoretically researched, they can be potential candidates for applications in future healthy buildings. This review will contribute to further knowledge and greater potential applications of promising VOC-reducing catalytic nanomaterials on healthier buildings for a better indoor and outdoor environment well-being.

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Section: Methodsmentioning

confidence: 99%

A Review on Catalytic Nanomaterials for Volatile Organic Compounds VOC Removal and Their Applications for Healthy Buildings

Shah

2019

Nanomaterials

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“…The asymmetrical Co 2p3/2 XPS profiles of all samples can be deconvoluted into two component peaks of Co 3+ (779.5 eV) and Co 2+ (780.8 eV). Generally, the cations of Mn 3+ and Co 2+ are considered to be involved in the formation of lattice oxygen, since the reversible valence transformation of cations (Mn 3+ ⇋ Mn 4+ + e and Co 2+ ⇋ Co 3+ + e) donates some electrons to activate oxygen during the catalytic reaction [42,43]. Based on the peak areas, the relative contents of Mn 3+ /Mn 4+ and Co 3+ /Co 2+ molar ratios are summarized in Table 1.…”

Section: Redox Behavior and Surface Chemical States Analysesmentioning

confidence: 99%

“…From another perspective, the effect of valence change on the physicochemical properties is also explained. Chen et al [43] recently reported that the interfacial effect existing in Ce-Mn composite oxides plays a key role in the modification of their physicochemical properties. The results of XPS indicated that the proportion of Ce 3+ and Mn 4+ cations is noticeably changed by the introduction of an appropriate amount of CeOy.…”

Section: Redox Behavior and Surface Chemical States Analysesmentioning

confidence: 99%

“…Generally, a high number of absorbed oxygen species is beneficial for the oxidation of toluene, and absorbed oxygen species play key roles in the catalytic oxidation process [30,64,65]. In addition, the reversible valence transformation of cations (Mn 3+ ⇋ Mn 4+ + e and Co 2+ ⇋ Co 3+ + e) donates some electrons to activate oxygen during the catalytic reaction [42,43]. Furthermore, the results of in situ DRIFTS demonstrated that the gaseous oxygen could be more easily activated into active adsorbed oxygen species on the surface of α-MnO2@Co3O4 than on that of α-MnO2.…”

Section: In Situ Drifts Analysismentioning

confidence: 99%

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Enhancing catalytic toluene oxidation over MnO2@Co3O4 by constructing a coupled interface

Ren

Fan

et al. 2020

Chinese Journal of Catalysis

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Herein, a bottom-down design is presented to successfully fabricate ZIF-derived Co3O4, grown in situ on a one-dimensional (1D) α-MnO2 material, denoted as α-MnO2@Co3O4. The synergistic effect derived from the coupled interface constructed between α-MnO2 and Co3O4 is responsible for the enhanced catalytic activity. The resultant α-MnO2@Co3O4 catalyst exhibits excellent catalytic activity at a T90% (temperature required to achieve a toluene conversion of 90%) of approximately 229 o C, which is 47 and 28 °C lower than those of the pure α-MnO2 nanowire and Co3O4-b obtained via pyrolysis of ZIF-67, respectively. This activity is attributed to the increase in the number of surface-adsorbed oxygen species, which accelerate the oxygen mobility and enhance the redox pairs of Mn 4+ /Mn 3+ and Co 2+ /Co 3+ . Moreover, the result of in situ diffuse reflectance infrared Fourier transform spectroscopy suggests that the gaseous oxygen could be more easily activated to adsorbed oxygen species on the surface of α-MnO2@Co3O4 than on that of α-MnO2. The catalytic reaction route of toluene oxidation over the α-MnO2@Co3O4 catalyst is as follows: toluene → benzoate species → alkanes containing oxygen functional group → CO2 and H2O. In addition, the α-MnO2@Co3O4 catalyst shows excellent stability and good water resistance for toluene oxidation. Furthermore, the preparation method can be extended to other 1D MnO2 materials. A new strategy for the development of high-performance catalysts of practical significance is provided.

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“…It can be speculated that the excess Cu species cannot fully enter into MnO 2 lattice, and some Cu atoms or clusters could be oxidized on the surface of MnO 2 . Figure 3b [a] Although the elemental analysis accuracy of XPS is limited by certain deviations, [19] the results measured on the same instrument can still distinguish the differences.…”

Section: Surface Compositionmentioning

confidence: 99%

Using the Interaction between Copper and Manganese to Stabilize Copper Single‐atom for CO Oxidation.

Jiang

Chen

Gao

et al. 2021

Chemistry A European J

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The interaction between Cu and Mn has been used to immobilize the Cu single-atom on MnO 2 surface by redoxdriven hydrolysis. Comprehensive structure and property characterizations demonstrate that the existence of an CuÀ Mn interaction on the catalyst surface can effectively restrain the aggregation of Cu single atoms and improve carbon monoxide (CO) oxidation activity. The interaction of forming the CuÀ OÀ Mn entity is beneficial for CO catalytic activity as the migration of reactive oxygen species and the coordination effect of active centers accelerate the reaction. In particular, 3%-Cu 1 /MnO 2 shows an oxygen storage capacity (OSC) value (342.75 μmol/g) more than ten times that of pure MnO 2 (27.79 μmol/g) and has high CO catalytic activity (T 90% = 80°C), it can maintain CO conversion of 95 % after 15 cycles. This work offers a reliable method for synthesizing Cu singleatom catalysts and deepens understanding of the interaction effect between single transition metal atoms and supports that can improve the catalytic activity of CO oxidation.

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A facile strategy of enhancing interaction between cerium and manganese oxides for catalytic removal of gaseous organic contaminants

Cited by 140 publications

References 61 publications

A Review on Catalytic Nanomaterials for Volatile Organic Compounds VOC Removal and Their Applications for Healthy Buildings

A Review on Catalytic Nanomaterials for Volatile Organic Compounds VOC Removal and Their Applications for Healthy Buildings

Enhancing catalytic toluene oxidation over MnO2@Co3O4 by constructing a coupled interface

Using the Interaction between Copper and Manganese to Stabilize Copper Single‐atom for CO Oxidation.

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