Aerosol-phase synthesis of bimetallic NiCu oxide-decorated CeO2 nanoparticle cluster for catalytic methane combustion

Du, Chuan-Bin; Law, Zhi Xuan; Huang, Ren-You; Tsai, De‐Hao

doi:10.1016/j.apt.2022.103649

Cited by 7 publications

(4 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The d c,Ni and d c , CeO 2 values of the samples after methane decomposition are summarized in Table S1. Comparing d c,Ni values before and after activity tests, the results indicated that Ni crystallites sintered after the catalysis of methane decomposition, and this sintering effect was found to be effectively suppressed when using alumina as the support material ( d c,Ni = 13.0–15.3 nm) in comparison to the samples using ceria as the support material ( d c,Ni = 20.2–30.4 nm). ,,− …”

Section: Resultsmentioning

confidence: 96%

Combined Methane Cracking for H₂ Production with CO₂ Utilization for Catalyst Regeneration Using Dual Functional Nanostructured Particles

Zeng,

Law,

Tsai

2024

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

A two-stage chemical looping approach is demonstrated for sustainable hydrogen production through methane decomposition (CH 4 → C + 2H 2 ) combined with cyclic catalyst regeneration via the reverse Boudouard reaction (C + CO 2 → 2CO). A Nibased spherical nanoparticle cluster, fabricated using a continuous aerosol-based synthetic approach, is developed for effective cyclic catalysis of the above two chemical reactions. A sufficiently high CO 2 conversion rate for catalyst regeneration (in terms of TOF CO 2 , 36.09 h −1 ) and a stably high yield of hydrogen (in terms of STY H 2 , 5.19 mmol g cat −1 min −1 ) are achievable using the 10Ni−1Ce/5Al sample. The outstanding performance of 10Ni−1Ce/ 5Al is attributed to the incorporation of CeO 2 as a promoter, which possesses a high redox ability that enhances catalytic activity.Additionally, the synergistic effect between nickel and ceria on the two-stage chemical looping is of crucial importance, where CeO 2 promotes CO 2 capture and Ni catalyzes CO 2 dissociation at the Ni−CeO 2 interface. CeO 2 -incorporated samples generating whisker carbon after methane pyrolysis demonstrate better activity for cyclic catalyst regeneration. The novelty of the work stands on developing a high-performance dual functional nanostructured catalyst using an aerosol-based synthetic route. This approach creates a massive amount of active interface, by which the two-stage reactions can be promoted under a remarkably low temperature (e.g., 600 °C). The proposed dual functional catalyst material and catalytic pathway demonstrate significant advances for effective hydrogen production combined with cyclic catalyst regeneration via CO 2 utilization, offering an eco-friendly pathway for industrial applications.

show abstract

Section: Resultsmentioning

confidence: 96%

Combined Methane Cracking for H₂ Production with CO₂ Utilization for Catalyst Regeneration Using Dual Functional Nanostructured Particles

Zeng,

Law,

Tsai

2024

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…As a consequence, many different synthesis processes have been developed to increase control and tuning of these parameters, either on pure CeO 2 powders or in combination with dopant elements. The proposed methods often rely on solution-based routes, high-temperature treatments, hydrothermal steps for the preparation of cube- and rod-like nanostructures, and, more recently, spray flame pyrolysis for uniform dispersion of CeO 2 crystallites. , The application of ball-milling has also been explored, yet mostly in relation with homogeneous distribution of CeO 2 -based powders for subsequent ceramic sintering processes rather than catalytic applications, − but the environmental advantages allowed by a solvent-free milling method have been favoring its application. , In addition, the milling processes have also been demonstrated on a larger scale , compared to other preparation methods, such as hydrothermal or combustion based. The mechanochemical synthesis has indeed attracted increasing attention in the latest years for the synthesis of advanced nanomaterials, usually aimed at the preparation of alloys − or at materials phase-tuning , in high energy milling conditions.…”

Section: Introductionmentioning

confidence: 99%

“…The proposed methods often rely on solution-based routes, 10 high-temperature treatments, 27 hydrothermal steps for the preparation of cube- and rod-like nanostructures, 9 and, more recently, spray flame pyrolysis for uniform dispersion of CeO 2 crystallites. 28 , 29 The application of ball-milling has also been explored, yet mostly in relation with homogeneous distribution of CeO 2 -based powders for subsequent ceramic sintering processes rather than catalytic applications, 30 − 33 but the environmental advantages allowed by a solvent-free milling method have been favoring its application. 34 , 35 In addition, the milling processes have also been demonstrated on a larger scale 36 , 37 compared to other preparation methods, such as hydrothermal or combustion based.…”

Section: Introductionmentioning

confidence: 99%

Tuning Chemical and Morphological Properties of Ceria Nanopowders by Mechanochemistry

Danielis,

Felli,

Zampol

et al. 2024

ACS Omega

View full text Add to dashboard Cite

Cerium oxide powders are widely used and are of fundamental importance in catalytic pollution control and energy production due to the unique chemical properties of CeO 2 . Processing steps involved in catalyst preparation, such as hightemperature calcination or mechanical milling processes, can alter the morphological and chemical properties of ceria, heavily affecting its final properties. Here, we focus on the tuning of CeO 2 nanopowder properties by mild-and high-energy milling processes, as the mechanochemical synthesis is gaining increasing attention as a green synthesis method for catalyst production. The textural and redox properties were analyzed by an array of techniques to follow the aggregation and comminution mechanisms induced by mechanical stresses, which are more prominent under high-energy conditions but strongly depend on the starting properties of the ceria powders. Simultaneously, the evolution of surface defects and chemical properties was followed by Raman spectroscopy and H 2 reduction tests, ultimately revealing a trade-off effect between structural and redox properties induced by the mechanochemical action. The mild-energy process appears to induce the largest enhancement in surface properties while maintaining bulk properties of the starting materials, hence confirming its effectiveness for its exploitation in catalysis.

show abstract

“…In some studies, CeO 2 nanoparticles were used as an additive to biodiesel fuel to increase the completeness of fuel combustion and reduce harmful combustion products [ 8 , 9 ]. In another study, a hybrid catalyst was created based on spherical NiCuO x bimetallic oxide nanoparticles decorated with a cluster of cerium nanoparticles (NiCuO x @CeO 2 ) [ 10 ]. This catalyst showed excellent results in the catalytic combustion of methane.…”

Section: Introductionmentioning

confidence: 99%

Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites

et al. 2023

View full text Add to dashboard Cite

In this work, CeO2 nanoparticles, as well as CeO2 nanocomposites with plasmonic silver nanoparticles, were synthesized using a simple sol-gel process. The concentration of silver in the composites varied from 0.031–0.25 wt%. Cerium hydroxide dried gel was calcined at temperatures from 125 to 800 °C to obtain CeO2. It was shown that, at an annealing temperature of 650 °C, single-phase CeO2 nanopowders with an average particle size in the range of 10–20 nm can be obtained. The study of acid-base properties showed that with an increase in the calcination temperature from 500 to 650 °C, the concentration of active centers with pKa 9.4 and 6.4 sharply increases. An analysis of the acid-base properties of CeO2-Ag nanocomposites showed that with an increase in the silver concentration, the concentration of centers with pKa 4.1 decreases, and the number of active centers with pKa 7.4 increases. In a model experiment on dye photodegradation, it was shown that the resulting CeO2 and CeO2-Ag nanopowders have photocatalytic activity. CeO2-Ag nanocomposites, regardless of the silver concentration, demonstrated better photocatalytic activity than pure nanosized CeO2.

show abstract

Aerosol-phase synthesis of bimetallic NiCu oxide-decorated CeO2 nanoparticle cluster for catalytic methane combustion

Cited by 7 publications

References 42 publications

Combined Methane Cracking for H₂ Production with CO₂ Utilization for Catalyst Regeneration Using Dual Functional Nanostructured Particles

Combined Methane Cracking for H₂ Production with CO₂ Utilization for Catalyst Regeneration Using Dual Functional Nanostructured Particles

Tuning Chemical and Morphological Properties of Ceria Nanopowders by Mechanochemistry

Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites

Contact Info

Product

Resources

About

Aerosol-phase synthesis of bimetallic NiCu oxide-decorated CeO2 nanoparticle cluster for catalytic methane combustion

Cited by 7 publications

References 42 publications

Combined Methane Cracking for H2 Production with CO2 Utilization for Catalyst Regeneration Using Dual Functional Nanostructured Particles

Combined Methane Cracking for H2 Production with CO2 Utilization for Catalyst Regeneration Using Dual Functional Nanostructured Particles

Tuning Chemical and Morphological Properties of Ceria Nanopowders by Mechanochemistry

Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites

Contact Info

Product

Resources

About

Combined Methane Cracking for H₂ Production with CO₂ Utilization for Catalyst Regeneration Using Dual Functional Nanostructured Particles

Combined Methane Cracking for H₂ Production with CO₂ Utilization for Catalyst Regeneration Using Dual Functional Nanostructured Particles