Co3O4-based catalysts for propane total oxidation: A state-of-the-art minireview

Zhang, Weidong; Valverde, J.L.; Giroir‐Fendler, A.

doi:10.1016/j.apcatb.2023.122908

Cited by 14 publications

(4 citation statements)

References 109 publications

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“…Figures S5 and S6 give further evidence of the involvement of other elements in both HP-(FeCrCoNiCu) x O y and (FeCrCoNiCu) x O y by XPS spectra, validating the EDS mapping results (Figure d–i). Figure c demonstrates the occurrence of three peaks for both HP-(FeCrCoNiCu) x O y and (FeCrCoNiCu) x O y , which can be categorized as surface-adsorbed oxygen ( O sur ) for 532.8 eV, oxygen vacancies ( O vac ) for 531.4 eV, and lattice oxygen ( O lat ) for 529.8 eV, correspondingly . It is well established that the ratio of O vac and O lat is a key parameter to prove the number of oxygen vacancies contained in the material.…”

Section: Resultsmentioning

confidence: 99%

Defect Engineering of High-Entropy Oxides for Superior Catalytic Oxidation Performance

Zhang,

Deng,

Chen

et al. 2023

ACS Appl. Mater. Interfaces

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High-entropy oxides (HEOs) are crucial in various fields (power storage/conversion, electronic devices, and catalysis) owing to their adjustable structural characteristics, fabulous stability, and massive components. However, the current strategies for synthesizing HEOs suffer from low surface area and limited active sites. Herein, we present a salt-assisted strategy with remarkable universality for the preparation of HEOs with high surface area [e.g., HP-(FeCrCoNiCu) x O y : 59 m 2 /g, HP-(ZnMgNiCuCo) x O y : 49 m 2 /g, and HP-(CrMnFeNiZn) x O y : 11 m 2 /g], where HP means high porosity. Especially, HP-(FeCrCoNiCu) x O y with rich-oxygen vacancies promotes catalytic efficiency for hydrocarbon and alcohol oxidation owing to its hierarchical texture and massive oxygen vacancies. Furthermore, density functional theory is utilized to well illustrate the relationship of the structure and catalytic efficiency within the catalysts. This work offers realistic pathway for the large-scale application of HEOs in catalytic areas.

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Section: Resultsmentioning

confidence: 99%

Defect Engineering of High-Entropy Oxides for Superior Catalytic Oxidation Performance

Zhang,

Deng,

Chen

et al. 2023

ACS Appl. Mater. Interfaces

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“…Researchers have successfully achieved high efficiency in VOCs removal by designing Co 3 O 4 catalysts with diverse shapes, strategically leveraging their abundant active centers, including Co 3 + , adsorbed oxygen, and surface lattice oxygen species. [27] In recent years, various methods for systematically manipulating the dimensional space of materials at the nanoscale have emerged. Zero-dimensional (0D), one-dimensional (1D), twodimensional (2D), and three-dimensional (3D) Co 3 O 4 catalysts have been extensively explored for VOCs elimination.…”

Section: Morphology Controlmentioning

confidence: 99%

Co₃O₄‐Based Catalysts for the Low‐Temperature Catalytic Oxidation of VOCs

Xiao,

Zhao,

et al. 2024

ChemCatChem

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Volatile organic compounds (VOCs) are a significant source of environmental pollution, posing threats to human safety. With growing concerns about environmental degradation, catalytic oxidation technology emerges as a paramount and widely adopted approach for VOCs elimination, renowned for its operational simplicity, energy efficiency, and environmental friendliness. As a representative transition metal catalyst, cobalt‐based catalysts have garnered widespread use in VOCs catalytic oxidation due to their costeffectiveness, versatility, and distinctive physicochemical properties. This paper provides a detailed exposition of the construction strategies and structure‐activity relationship of Co3O4‐based catalysts in VOCs oxidation reaction, encompassing both monometallic Co3O4 and multimetallic cobalt‐based catalysts. Furthermore, it offers a comprehensive summary and discussion of the latest research progress concerning Co3O4‐based catalysts in practical applications. Concluding with a meticulous analysis, the paper addresses the technical challenges inherent in developing Co3O4‐based catalysts for VOCs degradation. Additionally, it proposes research directions aimed at overcoming these challenges, contributing to the ongoing discourse on environmental sustainability.

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“…The efficient catalytic oxidation relies on high activity, good stability, and selectivity of the catalysts. , In addition, the actual working conditions also pay great attention to the water resistance of the VOC oxidation catalyst. , Compared with noble metal oxides, the transition metal oxide Co 3 O 4 has become the focus of many researchers as a result of its low price and excellent catalytic oxidation performance for C–H compounds. , It is well acknowledged that the shape, reducibility, structural defects, and specific surface area of the catalyst affect its catalytic performance. Co 3 O 4 catalysts with diverse shapes, such as sheets, belts, cubes, plates, and rods, have gotten a lot of attention for they expose distinct crystal planes and show different catalytic performances.…”

Section: Introductionmentioning

confidence: 99%

“…7,8 In addition, the actual working conditions also pay great attention to the water resistance of the VOC oxidation catalyst. 9,10 Compared with noble metal oxides, the transition metal oxide Co 3 O 4 has become the focus of many researchers as a result of its low price and excellent catalytic oxidation performance for C−H compounds. 11,12 It is well acknowledged that the shape, reducibility, structural defects, and specific surface area of the catalyst affect its catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Crystal Plane Effect of Co₃O₄ on Styrene Catalytic Oxidation: Insights into the Role of Co³⁺ and Oxygen Mobility at Diverse Temperatures

Chen

Zhang

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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In the oxidation reaction of volatile organic compounds catalyzed by metal oxides, distinguishing the role of active metal sites and oxygen mobility at specific preferentially exposed crystal planes and diverse temperatures is challenging. Herein, Co3O4 catalysts with four different preferentially exposed crystal planes [(220), (222), (311), and (422)] and oxygen vacancy formation energies were synthesized and evaluated in styrene complete oxidation. It is demonstrated that the Co3O4 sheet (Co3O4–I) presents the highest C8H8 catalytic oxidation activity (R 250 °C = 8.26 μmol g–1 s–1 and WHSV = 120,000 mL h–1 g–1). Density functional theory studies reveal that it is difficult for the (311) and (222) crystal planes to form oxygen vacancies, but the (222) crystal plane is the most favorable for C8H8 adsorption regardless of the presence of oxygen vacancies. The combined analysis of temperature-programmed desorption and temperature-programmed surface reaction of C8H8 proves that Co3O4–I possesses the best C8H8 oxidation ability. It is proposed that specific surface area is vital at low temperature (below 250 °C) because it is related to the amount of surface-adsorbed oxygen species and low-temperature reducibility, while the ratio of surface Co3+/Co2+ plays a decisive role at higher temperature because of facile lattice oxygen mobility. In situ diffuse reflectance infrared Fourier spectroscopy and the 18O2 isotope experiment demonstrate that C8H8 oxidation over Co3O4–I, Co3O4–S, Co3O4–C, and Co3O4–F is mainly dominated by the Mars–van Krevelen mechanism. Furthermore, Co3O4–I shows superior thermal stability (57 h) and water resistance (1, 3, and 5 vol % H2O), which has the potential to be conducted in the actual industrial application.

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Co3O4-based catalysts for propane total oxidation: A state-of-the-art minireview

Cited by 14 publications

References 109 publications

Defect Engineering of High-Entropy Oxides for Superior Catalytic Oxidation Performance

Defect Engineering of High-Entropy Oxides for Superior Catalytic Oxidation Performance

Co₃O₄‐Based Catalysts for the Low‐Temperature Catalytic Oxidation of VOCs

Crystal Plane Effect of Co₃O₄ on Styrene Catalytic Oxidation: Insights into the Role of Co³⁺ and Oxygen Mobility at Diverse Temperatures

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Co3O4-based catalysts for propane total oxidation: A state-of-the-art minireview

Cited by 14 publications

References 109 publications

Defect Engineering of High-Entropy Oxides for Superior Catalytic Oxidation Performance

Defect Engineering of High-Entropy Oxides for Superior Catalytic Oxidation Performance

Co3O4‐Based Catalysts for the Low‐Temperature Catalytic Oxidation of VOCs

Crystal Plane Effect of Co3O4 on Styrene Catalytic Oxidation: Insights into the Role of Co3+ and Oxygen Mobility at Diverse Temperatures

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Product

Resources

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Co₃O₄‐Based Catalysts for the Low‐Temperature Catalytic Oxidation of VOCs

Crystal Plane Effect of Co₃O₄ on Styrene Catalytic Oxidation: Insights into the Role of Co³⁺ and Oxygen Mobility at Diverse Temperatures