CoZSM-11 catalysts for N2O decomposition: Effect of preparation methods and nature of active sites

Xie, Pengfei; Luo, Yanqi; Ma, Zhen; Wang, Liying; Huang, Chengyun; Yue, Yinghong; Hua, Weiming; Gao, Zi

doi:10.1016/j.apcatb.2015.01.027

Cited by 38 publications

(19 citation statements)

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“…They were converted into Na-type and then Na + was substituted with Cu 2+ via ion exchange (see the Experimental Method). 45,46 A Cu/Al ratio of ~0.5 was targeted for full exchange (Table 1). 46 In the following discussion, the Cuexchanged zeolites are denoted as Cu-ZSM5-x, where x represents the Si/Al element ratio, e.g., Cu-ZSM5-11.5 for Cu-ZSM5 with Si/Al ~ 11.5.…”

Section: Resultsmentioning

confidence: 99%

“…45,46 A Cu/Al ratio of ~0.5 was targeted for full exchange (Table 1). 46 In the following discussion, the Cuexchanged zeolites are denoted as Cu-ZSM5-x, where x represents the Si/Al element ratio, e.g., Cu-ZSM5-11.5 for Cu-ZSM5 with Si/Al ~ 11.5. Brunauer-Emmett-Teller (BET) measurements show that the five types of Cu-ZSM5 have rather consistent specific surface areas in the range of 370−400 m 2 g −1 ( Table 1, also see Figure S2 for the N2 adsorption and desorption isotherms).…”

Section: Resultsmentioning

confidence: 99%

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Bridging adsorption analytics and catalytic kinetics for metal-exchanged zeolites

Xie

Aranovich

et al. 2021

Nat Catal

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Metal-exchanged zeolites have been widely used in industrial catalysis and separation, but fundamental understanding of their structure-property relationships has remained challenging, largely due to the lack of quantitative information concerning the atomic structures and reactionrelevant adsorption properties of the embedded metal active sites. We report on the use of lowtemperature chemisorption to titrate Cu-exchanged ZSM5. Quantitative descriptors of the atomic structures and adsorption properties of Cu-ZSM5 are established by combining atomistic simulation, DFT calculations, operando molecular spectroscopy, chemisorption and titration measurements. These descriptors are then applied to interpret the catalytic performance of Cu-ZSM5 for NO decomposition. Linear correlations are established to bridge the low-temperature adsorption analytics and high-temperature reaction kinetics, which are demonstrated to be generally applicable for understanding the structure-property relationships of metal exchanged zeolites and foregrounded for guiding the development of advanced catalytic materials.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Bridging adsorption analytics and catalytic kinetics for metal-exchanged zeolites

Xie

Aranovich

et al. 2021

Nat Catal

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“…For instance, Kustova et al [71] found that Cu-ZSM-11 outperforms Cu-ZSM-5 in NO decomposition. We found that Cu-ZSM-11 and Co-ZSM-11 are more active in N 2 O decomposition than Cu-ZSM-5 and Co-ZSM-5, respectively, due to enhanced reducibility of active species and better accessibility of active sites in Cu-ZSM-11 and Co-ZSM-11 [72,73].…”

Section: Introductionmentioning

confidence: 90%

“…We previously reported the synthesis of Cu-ZSM-11 and Co-ZSM-11 via WIE [72,73]. The Cu content of Cu-ZSM-11 (Si/Al = 15) is 2.06 wt.%, and the Cu/Al molar ratio is 0.52, consistent with the theoretical value of 0.5 (one Cu 2+ compensates for Here we adopted a similar experimental condition (2 g Na-ZSM-11, 150 mL 0.01 M Fe(NO 3 ) 3 solution, ion exchange three times) to prepare Fe-ZSM-11.…”

Section: Complexity Of Catalyst Preparation: a Comparison With Cu-zsmmentioning

confidence: 99%

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Catalytic decomposition of N2O over Fe-ZSM-11 catalysts prepared by different methods: Nature of active Fe species

Xie

Luo

Ma³

et al. 2015

Journal of Catalysis

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Catalytic Decomposition of N₂O over Co–Ti Oxide Catalysts: Interaction between Co and Ti Oxide

Zhang

Sui

et al. 2016

ChemCatChem

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A series of CoxTi catalysts with different Co/Ti molar ratios (x=0.2, 0.4, 0.6, and 0.8) were prepared by the sol‐gel method and used for N2O decomposition. The catalysts were characterized by XRD, X‐ray photoelectron spectroscopy (XPS), TEM, temperature‐programmed reduction with H2, temperature‐programmed desorption of O2, diffuse reflectance UV/Vis, Raman spectra, and N2 adsorption–desorption measurements. The results indicate that the CoxTi catalysts possess high Brunauer–Emmett–Teller (BET) surface area, more surface Co3+, and even better structural stability than Co3O4 as a result of the strong interactions between Co and Ti oxide. Deactivation occurred over time for the Co3O4 catalyst, however, Co0.6Ti maintains nearly 100 % N2O conversion for at least 30 h. Moreover, the Co0.6Ti catalyst showed much stronger resistance against 1.5 vol. % O2, 2.4 vol. % H2O, or 1.6 vol. % NO in the feed compared with the Co3O4 catalyst. The excellent activity of the Co0.6Ti catalyst can be attributed to the higher amount of surface Co3+ derived from the interaction of the Co and Ti oxide in the CoxTi catalysts.

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CoZSM-11 catalysts for N2O decomposition: Effect of preparation methods and nature of active sites

Cited by 38 publications

References 84 publications

Bridging adsorption analytics and catalytic kinetics for metal-exchanged zeolites

Bridging adsorption analytics and catalytic kinetics for metal-exchanged zeolites

Catalytic decomposition of N2O over Fe-ZSM-11 catalysts prepared by different methods: Nature of active Fe species

Catalytic Decomposition of N₂O over Co–Ti Oxide Catalysts: Interaction between Co and Ti Oxide

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CoZSM-11 catalysts for N2O decomposition: Effect of preparation methods and nature of active sites

Cited by 38 publications

References 84 publications

Bridging adsorption analytics and catalytic kinetics for metal-exchanged zeolites

Bridging adsorption analytics and catalytic kinetics for metal-exchanged zeolites

Catalytic decomposition of N2O over Fe-ZSM-11 catalysts prepared by different methods: Nature of active Fe species

Catalytic Decomposition of N2O over Co–Ti Oxide Catalysts: Interaction between Co and Ti Oxide

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Catalytic Decomposition of N₂O over Co–Ti Oxide Catalysts: Interaction between Co and Ti Oxide