Controlled reaction depth by metal (M=Fe, Ni, Mn and Ti) doped ceria in selective oxidation of ethane with carbon dioxide

Li, Linyi; Tan, Renjun; Luo, Shi-Zhong; Jiang, Chengfa; Jing, Fangli

doi:10.1016/j.apcata.2022.118565

Cited by 14 publications

(7 citation statements)

References 63 publications

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“…The corresponding results were displayed in Figure 3c and d, and the peaks were fitted by Gaussian‐Lorentz curves. The complex Ce 3d peak was decomposed into 10 peaks, in which Ce 3+ was resolved into 4 peaks and Ce 4+ was divided into 6 peaks [32,33] . Moreover, the ratio of Ce 3+ /(Ce 3+ +Ce 4+ ) over the reduced 10CeCu (H 2 – 300 °C) was greater than that of the corresponding fresh samples which showed 23.9 % for fresh samples and 43.6 % for reduced.…”

Section: Resultsmentioning

confidence: 92%

“…The complex Ce 3d peak was decomposed into 10 peaks, in which Ce 3 + was resolved into 4 peaks and Ce 4 + was divided into 6 peaks. [32,33] Moreover, the ratio of Ce 3 + /(Ce 3 + + Ce 4 + ) over the reduced 10CeCu (H 2 -300 °C) was greater than that of the corresponding fresh samples which showed 23.9 % for fresh samples and 43.6 % for reduced. This proved that CeO 2 produced a large number of oxygen vacancies in the reductive atmosphere, which might be conducive to water activation.…”

Section: Formation Of the Inverse Active Interfacementioning

confidence: 90%

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Dynamic Structural Evolution of CeO₂ in CuO−CeO₂ Catalyst Revealed by In Situ Spectroscopy

Wu,

Wang,

Wang

et al. 2023

ChemCatChem

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The oxides and active metals at the interface synergistically activate reactants and thus promote the reaction, but the interface structure often changes dynamically during the reaction. In the conventional supported catalysts, the metals at the interface have been extensively studied, while the structural evolution of oxides is often overlooked. In this work, we design the CeO2‐CuO inverse catalysts to reveal the dynamic structure evolution of CeO2 in the CeO2‐CuO system during the water gas shift (WGS) reaction by in situ Raman, in situ XRD, quasi in situ XPS, and near ambient pressure XPS (NAP‐XPS). We find that CeO2 is partially concealed in the CuO phase in the un‐pretreated catalyst and gradually exposed to the surface, forming an inverse CeOx/Cu structure during the reducing process. This structure exhibits a high catalytic activity in the WGS reaction and remains durable under the reductive conditions. When the inverse CeOx/Cu structure is exposed to the non‐redox conditions, the reconfiguration of the reduced oxide is observed which is caused by the oxygen migration of CeO2. This work explores the structure evolution of CeO2 in CeO2‐CuO inverse catalyst under different conditions and provides a reference for monitoring the dynamic changes of oxide structure.

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Section: Resultsmentioning

confidence: 92%

Section: Formation Of the Inverse Active Interfacementioning

confidence: 90%

Dynamic Structural Evolution of CeO₂ in CuO−CeO₂ Catalyst Revealed by In Situ Spectroscopy

Wu,

Wang,

Wang

et al. 2023

ChemCatChem

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“…39 The peaks at 853.9 and 855.5 eV corresponded to Ni 2+ and Ni 3+ , respectively. 40 The valence state ratios of each catalyst are listed in Table S1 †. The ratio of Mn 4+ /(Mn 4+ + Mn 3+ + Mn 2+ ) in Mn–CeO 2 was 32%, higher than that (26.2%) of Mn 2 O 3 .…”

Section: Resultsmentioning

confidence: 99%

Revealing the intrinsic nature of Ni-, Mn-, and Y-doped CeO₂ catalysts with positive, additive, and negative effects on CO oxidation using operando DRIFTS-MS

Fang,

Sun,

et al. 2023

Dalton Trans.

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“…CeO 2 nanorods were prepared by hydrothermal method 33,34 . In a typical synthesis, 8 mL of NaOH (6 M) aqueous solution was dropped into 88 mL of Ce(NO 3 ) 3 ·6H 2 O (0.1 M) aqueous solution.…”

Section: Methodsmentioning

confidence: 99%

“…CeO 2 nanorods were prepared by hydrothermal method. 33,34 In a typical synthesis, 8 mL of NaOH (6 M) aqueous solution was dropped into 88 mL of Ce(NO 3 ) 3 Á6H 2 O (0.1 M) aqueous solution. After stirring for 15 seconds, the solution was transferred to a Teflonlined stainless-steel autoclave and heated at 90 C for 48 hours.…”

Section: Preparation Of Ceo 2 Nanorodsmentioning

confidence: 99%

Promoted catalytic vapor phase transfer hydrogenation of levulinic acid to γ‐valerolactone by coordinated size effect and acid property of bimetallic Ni/ CeO ₂ catalyst

Liu

Liang

Jing

et al. 2022

Intl J of Energy Research

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Summary A series of Ni/CeO2 catalysts with different Ni loadings was prepared by the impregnation method, and characterized by XRD, N2 adsorption/desorption isotherms, H2‐TPR, H2‐TPD, NH3‐TPD, Pyridine probed FT‐IR, TEM, XPS, EPR, and TG to study the crystalline phase, porosity, redox, dispersion of metal species, acid property, chemical state of surface and coke. The addition of Ni decreased efficiently the apparent activation energy by more than 14%. The correlation analysis revealed that the loading of NiO had profound influences on particle size and acidity which need to be well coordinated to get good catalytic performance. In the hydrogenation of levulinic acid using formic acid as the hydrogen source, the 5Ni/CeO2 catalyst with moderate Ni particle size of 6.9 nm and appropriate acidic strength distribution (Strong/Weak = ca. 2.8) demonstrated superior catalytic performance with a levulinic acid conversion of 73% and a γ‐valerolactone selectivity of 90%. The 5Ni/CeO2 among the bimetallic catalysts showed the best coke resistance (0.32 gC/gcat.) despite the fact that coke deposition was still inevitable during the reaction.

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Controlled reaction depth by metal (M=Fe, Ni, Mn and Ti) doped ceria in selective oxidation of ethane with carbon dioxide

Cited by 14 publications

References 63 publications

Dynamic Structural Evolution of CeO₂ in CuO−CeO₂ Catalyst Revealed by In Situ Spectroscopy

Dynamic Structural Evolution of CeO₂ in CuO−CeO₂ Catalyst Revealed by In Situ Spectroscopy

Revealing the intrinsic nature of Ni-, Mn-, and Y-doped CeO₂ catalysts with positive, additive, and negative effects on CO oxidation using operando DRIFTS-MS

Promoted catalytic vapor phase transfer hydrogenation of levulinic acid to γ‐valerolactone by coordinated size effect and acid property of bimetallic Ni/ CeO ₂ catalyst

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Controlled reaction depth by metal (M=Fe, Ni, Mn and Ti) doped ceria in selective oxidation of ethane with carbon dioxide

Cited by 14 publications

References 63 publications

Dynamic Structural Evolution of CeO2 in CuO−CeO2 Catalyst Revealed by In Situ Spectroscopy

Dynamic Structural Evolution of CeO2 in CuO−CeO2 Catalyst Revealed by In Situ Spectroscopy

Revealing the intrinsic nature of Ni-, Mn-, and Y-doped CeO2 catalysts with positive, additive, and negative effects on CO oxidation using operando DRIFTS-MS

Promoted catalytic vapor phase transfer hydrogenation of levulinic acid to γ‐valerolactone by coordinated size effect and acid property of bimetallic Ni/ CeO 2 catalyst

Contact Info

Product

Resources

About

Dynamic Structural Evolution of CeO₂ in CuO−CeO₂ Catalyst Revealed by In Situ Spectroscopy

Dynamic Structural Evolution of CeO₂ in CuO−CeO₂ Catalyst Revealed by In Situ Spectroscopy

Revealing the intrinsic nature of Ni-, Mn-, and Y-doped CeO₂ catalysts with positive, additive, and negative effects on CO oxidation using operando DRIFTS-MS

Promoted catalytic vapor phase transfer hydrogenation of levulinic acid to γ‐valerolactone by coordinated size effect and acid property of bimetallic Ni/ CeO ₂ catalyst