Catalytic ozonation of toluene over amorphous Cu–Mn bimetallic oxide: Influencing factors, degradation mechanism and pathways

Wang, Guanjie; Ye, Zhiping; Zhao, Liang; Liu, Yang; Ji, Jiayu; Wang, Jiade

doi:10.1016/j.chemosphere.2022.135993

Cited by 20 publications

(8 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6a, the Mn 2p 3/2 spectra could be deconvoluted into three counterparts at the binding energies (BE) of 640.7, 641.7 and 642.8 eV, which was attributable to the Mn 2+ , Mn 3+ and Mn 4+ cations, respectively. 46–48 This phenomenon revealed the coexistence of variable valence states of manganese. However, the crystalline phases of MnO and MnO 2 were undetectable in the XRD patterns of the prepared Mn-based catalysts, which could be due to the surface low content of MnO and the amorphous distribution of MnO 2 .…”

Section: Resultsmentioning

confidence: 92%

“…NJC Paper cations, respectively. [46][47][48] This phenomenon revealed the coexistence of variable valence states of manganese. However, the crystalline phases of MnO and MnO 2 were undetectable in the XRD patterns of the prepared Mn-based catalysts, which could be due to the surface low content of MnO and the amorphous distribution of MnO 2 .…”

Section: Surface Elemental Analysismentioning

confidence: 88%

See 1 more Smart Citation

Mn–Zr composite oxides as efficient catalysts for catalytic oxidation of vinyl chloride

et al. 2023

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 92%

Section: Surface Elemental Analysismentioning

confidence: 88%

Mn–Zr composite oxides as efficient catalysts for catalytic oxidation of vinyl chloride

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Figure 6B shows the in situ DRIFTS spectra over CeO 2 in the presence of O 3 . The characteristic peaks of ozone 46,47 at 1013−1057 cm −1 were gradually decreased with the increase of temperature. When the temperature reached 140 °C, the peaks of O 2 − disappeared, the peaks of O 2 2− slowly rose, and the peak intensity of O 2 − over CeO 2 was much lower than that over Pt NRs/CeO 2 .…”

Section: Surface Property and Oxygen Speciesmentioning

confidence: 97%

Highly Efficient Catalytic Ozonization at Ultralow Temperatures of Multicomponent VOCs over the Pt/CeO₂ Catalysts

Wang,

Liu,

Deng

et al. 2023

ACS EST Eng.

View full text Add to dashboard Cite

Industrial flue gas has a great impact on the atmosphere environment and human health, and its emission temperatures are usually below 180 °C, which needs a new technology that can catalyze the removal of the multicomponent VOCs over high-performance catalysts in the presence of ozone. In this work, we prepared the Pt/CeO2 catalysts with different morphologies of Pt particles and investigated their catalytic performance for the ozonization of mixed VOCs (i.e., toluene and chlorobenzene (CB)). Among all of the as-prepared samples, Pt NRs/CeO2 with nanorod-like Pt particles showed excellent catalytic performance for the ozonization of toluene and CB. The T 50% (the temperature at VOC conversion = 50%) values for toluene and CB ozonization were 40 and 48 °C at a space velocity of 40,000 mL g–1 h–1, respectively. The results of characterization revealed that the reactive oxygen species involved in the VOC ozonization were mainly the O2 – and O2 2– species, surface oxygen vacancies of CeO2 were the active sites for the conversion of ozone to the reactive oxygen species, and the O2 – species was the mainly active oxygen species in the low-temperature VOC oxidation. Furthermore, partial reactive oxygen species reacted with the Pt n+ species to generate more amount of the Pt0 species, and the metallic platinum species was the main active site for the adsorption and activation of toluene and CB. The chemisorbed VOCs at the Pt0 sites reacted with the reactive oxygen species at the interface of Pt and CeO2, resulting in the excellent low-temperature catalytic activity. Compared with the reaction without ozone participation, we find that the participation of ozone can not only decrease the reaction temperature but also reduce the production of toxic byproducts. We are sure that the Pt/CeO2 catalyst is promising in practical application for elimination of the VOCs from industrial flue gas.

show abstract

“…The high price and scarcity of commercial noble metal catalysts (Ag, Rh, Pd, Pt) limit the widespread use of this technology. In this case, the low-cost and abundant transition-metal catalysts (Mn, Co, Fe, Cu , ) are considered promising alternatives for the toluene oxidation catalysts. However, the performance of transition-metal-based catalysts demands further improvement compared with that of noble metal-based catalysts.…”

Section: Introductionmentioning

confidence: 99%

Oxidation of Toluene over Mesoporous MnO₂/CeO₂ Nanosphere Catalysts: Effects of the MnO₂ Precursor and the Type of Support

Cui

Zhang

et al. 2023

Inorg. Chem.

View full text Add to dashboard Cite

Toluene is the most common volatile organic compound (VOC), and the MnO2-based catalyst is one of the excellent nonprecious metal catalysts for toluene oxidation. In this study, the effects of MnO2 precursors and the support types on the oxidation performance of toluene were systematically explored. The results showed that the 15MnO2/MS-CeO2-N catalyst with Mn(NO3)2·4H2O as the precursor and the mesoporous CeO2 nanosphere (MS-CeO2) as the support exhibited the most excellent performance. To reveal the reason behind this phenomenon, the calcination process of the catalyst precursor and the reaction process of toluene oxidation were investigated by in situ DRIFTS. It was found that the MnO2 precursor and the type of catalyst support could have a large effect on the reaction pathway and the produced intermediates. Therefore, the roles of the MnO2 precursor and the type of support should be key considerations when developing the high-performance MnO2-based toluene oxidation catalyst.

show abstract

Catalytic ozonation of toluene over amorphous Cu–Mn bimetallic oxide: Influencing factors, degradation mechanism and pathways

Cited by 20 publications

References 36 publications

Mn–Zr composite oxides as efficient catalysts for catalytic oxidation of vinyl chloride

Mn–Zr composite oxides as efficient catalysts for catalytic oxidation of vinyl chloride

Highly Efficient Catalytic Ozonization at Ultralow Temperatures of Multicomponent VOCs over the Pt/CeO₂ Catalysts

Oxidation of Toluene over Mesoporous MnO₂/CeO₂ Nanosphere Catalysts: Effects of the MnO₂ Precursor and the Type of Support

Contact Info

Product

Resources

About

Catalytic ozonation of toluene over amorphous Cu–Mn bimetallic oxide: Influencing factors, degradation mechanism and pathways

Cited by 20 publications

References 36 publications

Mn–Zr composite oxides as efficient catalysts for catalytic oxidation of vinyl chloride

Mn–Zr composite oxides as efficient catalysts for catalytic oxidation of vinyl chloride

Highly Efficient Catalytic Ozonization at Ultralow Temperatures of Multicomponent VOCs over the Pt/CeO2 Catalysts

Oxidation of Toluene over Mesoporous MnO2/CeO2 Nanosphere Catalysts: Effects of the MnO2 Precursor and the Type of Support

Contact Info

Product

Resources

About

Highly Efficient Catalytic Ozonization at Ultralow Temperatures of Multicomponent VOCs over the Pt/CeO₂ Catalysts

Oxidation of Toluene over Mesoporous MnO₂/CeO₂ Nanosphere Catalysts: Effects of the MnO₂ Precursor and the Type of Support