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

Chen, Yinye; Zhang, Zhen; Wang, Xin; Lin, Yu; Zuo, Juan; Yang, Xinghua; Chen, Songhua; Luo, Yongjin; Qian, Qingrong; Chen, Qinghua

doi:10.1021/acsami.3c04731

Cited by 12 publications

(5 citation statements)

References 49 publications

(71 reference statements)

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“…It is well-known that electron paramagnetic resonance (EPR) is also a typical and important means to verify the presence of oxygen vacancies. Given the occurrence of a strong signal at g = 2.003, the presence of oxygen vacancies within HEO-600 can be confirmed (Figure c) . Therefore, a large number of oxygen defects are present in HEO-600 compared to the weak signal for PR-HEO-600.…”

Section: Resultsmentioning

confidence: 75%

Flowerlike Nanosheet-Based High-Entropy Oxides as Catalysts for Aerobic Oxidation of Benzyl Alcohol

Zhang,

Chen,

et al. 2023

ACS Appl. Nano Mater.

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Aerobic oxidation of benzyl alcohol (BAL) under ambient reaction conditions is a charming goal for the fabrication of high-value oxygenates. However, competent catalysts are presently lacking. Herein, we present a flower-like high entropy oxide (HEO) nanosheet with rich oxygen vacancies for the BAL oxidation by utilizing the high-entropy metal organic framework (HE-MOF) as a precursor. Collective characterizations indicate that the substantial OV and massive pores of HEO facilitate substrate activation, promote mass transfer, and enhance catalytic efficiency. Both experimental results and density functional theory (DFT) simulations clearly illustrate the promoting role of OV in the process for reactant activation, thus significantly contributing to the formation of active oxygen species and driving subsequent oxidation more feasible. This work shines light on structural microenvironmental regulation induced via oxygen-vacancy defect engineering to realize superior selective oxidation catalysis.

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Section: Resultsmentioning

confidence: 75%

Flowerlike Nanosheet-Based High-Entropy Oxides as Catalysts for Aerobic Oxidation of Benzyl Alcohol

Zhang,

Chen,

et al. 2023

ACS Appl. Nano Mater.

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“…Catalytic combustion (oxidation) has been widely regarded as one of the most promising ways to eliminate VOC emissions due to its low cost and high efficiency. , The core of this technology lies in the development of catalysts that convert harmful VOCs into harmless CO 2 and H 2 O, which can exhibit remarkable activity at low temperatures and exceptional thermal stability at high temperatures. , Although noble metal-based ( e.g. , Pt and Pd) catalysts have high catalytic activity for VOC oxidation, − the high cost poses a significant barrier to widespread implementation, which has prompted researchers to focus on developing low-cost transition metal oxide catalysts. − …”

Section: Introductionmentioning

confidence: 99%

Weakening Mn–O Bond Strength in Mn-Based Perovskite Catalysts to Enhance Propane Catalytic Combustion

Wu,

Ruan,

Huang

et al. 2024

Inorg. Chem.

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Exploring highly efficient and robust non-noble metal catalysts for VOC abatement is crucial but challenging. Mn-based perovskites are a class of redox catalysts with good thermal stability, but their activity in the catalytic combustion of light alkanes is insufficient. In this work, we modulated the Mn–O bond strength in a Mn-based perovskite via defect engineering, over which the catalytic activity of propane combustion was significantly enhanced. It demonstrates that the oxygen vacancy concentration and the Mn–O bond strength can be efficiently modulated by finely tuning the Ni content in SmNi x Mn1–x O3 perovskite catalysts (SN x M1–x ), which in turn can enhance the redox ability and generate more active oxygen species. The SN0.10M0.90 catalyst with the lowest Mn–O bond strength exhibits the lowest apparent activation energy, over which the propane conversion rate increases by 3.6 times compared to that on the SmMnO3 perovskite catalyst (SM). In addition, a SN0.10M0.90/cordierite monolithic catalyst can also exhibit a remarkable catalytic performance and deliver excellent long-term durability (1000 h), indicating broad prospects in industrial applications. Moreover, the promotional effect of Ni substitution was further unveiled by density functional theory (DFT) calculations. This work brings a favorable guidance for the exploration of highly efficient perovskite catalysts for light alkane elimination.

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“…Besides electronic effects, multiple Cu–oxide interfaces (Cu–MgAlO x and Cu–CoAlO x ) were designed by Wang et al to regulate the reaction pathway of the furfural hydrogenation via the selective adsorption and activation of the functional groups on interfacial sites . Co 3 O 4 featuring the redox behaviors is deemed as a promising catalyst for various oxidation and hydrogenation reactions. , Furthermore, the enhanced reducibility of Co 3 O 4 as the support of noble metal catalysts, originating from the hydrogen spillover effect, favors the creation of the interface between the noble metal and metallic cobalt . To the best of our knowledge, the study of the metal–support interaction mainly focuses on the effects on the properties and catalytic performance of the metal component.…”

Section: Introductionmentioning

confidence: 99%

Constructing a Pd–Co Interface to Tailor a d-Band Center for Highly Efficient Hydroconversion of Furfural over Cobalt Oxide-Supported Pd Catalysts

Yuan,

Wang,

et al. 2023

ACS Appl. Mater. Interfaces

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Cobalt is an alternative catalyst for furfural hydrogenation but suffers from the strong binding of H and furan ring on the surface, resulting in low catalytic activity and chemoselectivity. Herein, by constructing a Pd−Co interface in cobalt oxidesupported Pd catalysts to tailor the d-band center of Co, the concerted effort of Pd and Co boosts the catalytic performance for the hydroconversion of furfural to cyclopentanone and cyclopentanol. The increased dispersion of Pd on acid etching Co 3 O 4 promotes the reduction of Co 3+ to Co 0 by enhancing hydrogen spillover, favoring the creation of the Pd−Co interface. Both experimental and theoretical calculations demonstrate that the electron transfer from Pd to Co at the interface results in the downshift of the d-band center of Co atoms, accompanied by the destabilization of H and furan ring adsorption on the Co surface, respectively. The former improves the furfural hydrogenation with TOF on Co elevating from 0.20 to 0.62 s −1 , and the latter facilitates the desorption of formed furfuryl alcohol from the Co surface for subsequently hydrogenative rearrangement of the furan ring to cyclopentanone on acid sites. The resultant Pd/Co 3 O 4 -6 catalyst delivers superior activity with a 99% furfural conversion and 85% overall selectivity toward cyclopentanone/cyclopentanol. We anticipate that such a concept of tailoring the d-band center of Co via interface engineering provides novel insight and feasible approach for the design of highly efficient catalysts for furfural hydroconversion and beyond.

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

Cited by 12 publications

References 49 publications

Flowerlike Nanosheet-Based High-Entropy Oxides as Catalysts for Aerobic Oxidation of Benzyl Alcohol

Flowerlike Nanosheet-Based High-Entropy Oxides as Catalysts for Aerobic Oxidation of Benzyl Alcohol

Weakening Mn–O Bond Strength in Mn-Based Perovskite Catalysts to Enhance Propane Catalytic Combustion

Constructing a Pd–Co Interface to Tailor a d-Band Center for Highly Efficient Hydroconversion of Furfural over Cobalt Oxide-Supported Pd Catalysts

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