Thermal-stable Pd@mesoporous silica core-shell nanocatalysts for dry reforming of methane with good coke-resistant performance

Yue, Lei; Li, Jiamao; Chen, Chao; Fu, Xiaolong; Gong, Yu; Xiulong, Xia; Hou, Jingwei; Xiao, Chengjian; Chen, Xiaojun; Zhao, Linjie; Ran, Guangming; Wang, Heyi

doi:10.1016/j.fuel.2018.01.052

Cited by 70 publications

(19 citation statements)

References 29 publications

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“…Noble metals have also been used in such core-shell structures for DRM. Yue et al 54 encapsulated Pd nanocubes with exposed [100] planes in mesoporous SiO 2 spheres. The core-shell Pd nanocube@m-SiO 2 catalyst showed higher activity and stability than the conventional supported catalyst by preventing agglomeration of Pd nanoparticles, maintaining higher surface area and mesoporous structure.…”

Section: Core-shell Catalysts For Thermocatalytic Co 2 Conversionmentioning

confidence: 99%

Core–shell structured catalysts for thermocatalytic, photocatalytic, and electrocatalytic conversion of CO₂

et al. 2020

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Section: Core-shell Catalysts For Thermocatalytic Co 2 Conversionmentioning

confidence: 99%

Core–shell structured catalysts for thermocatalytic, photocatalytic, and electrocatalytic conversion of CO₂

et al. 2020

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“…Yue et al. designed cubic Pd@SiO 2 core shell catalysts via sol‐gel method for DRM reaction . The catalysts showed stable and active performance due to the high sintering resistance.…”

Section: Applications Of Core/yolk Shell Catalysts For Hydrocarbon Rementioning

confidence: 99%

Sintering and Coke Resistant Core/Yolk Shell Catalyst for Hydrocarbon Reforming

Wang

Kawi

2018

ChemCatChem

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Syngas/hydrogen production via hydrocarbon reforming reactions is crucial. Whereas, they need high reaction temperature to obtain economically feasible hydrocarbon conversions, which renders the active and cheap transition metal based catalysts easy to be sintered, leading to the high carbon deposition rate and gradual degradation of catalytic performance. Therefore, developing sintering and carbon resistant catalysts becomes one of the most important issues for these reforming reactions to be industrially applied. Designing catalysts with core/yolk shell structure turns out to be one of the most effective strategies to solve this issue. Herein, recent progress which has been made in the synthesis method for core/yolk shell catalysts with different shell materials such as SiO2, zeolite, CeO2 and Al2O3 is summarized. Additionally, specific applications of these core/yolk catalysts for various hydrocarbon reforming reactions such as dry reforming, steam reforming and methane oxidation are reviewed with the emphasis on revealing the reasons leading to their outstanding catalytic performance. Lastly, possible research directions in core/yolk shell catalysts are proposed.

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“…Regarding the DRM catalyst, Nickel-based catalysts are mostly selected for the DRM process due to high activity and low price 5 – 10 . However, the main challenge to put DRM into practical use is the deactivation due to coking of the catalysts used in the process 11 – 15 . Alternative choices other than nickel: the noble metals, e.g., rhodium (Rh), ruthenium (Ru), and palladium (Pd), providing higher DRM activity and better stability are promising candidates; they are too expensive, making the process impractical 16 , 17 .…”

Section: Introductionmentioning

confidence: 99%

Experimental and computational investigation on underlying factors promoting high coke resistance in NiCo bimetallic catalysts during dry reforming of methane

Saelee

Lerdpongsiripaisarn

Rittiruam

et al. 2021

Sci Rep

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Global warming remains one of the greatest challenges. One of the most prominent solutions is to close the carbon cycle by utilizing the greenhouse gas: CO2, and CH4, as a feedstock via the dry reforming of methane (DRM). This work provided an insight into how the NiCo bimetallic catalyst can perform with high stability against coking during DRM compared to the Ni and Co monometallic catalysts, in which the experimental and computational techniques based on density functional theory were performed. It was found that the high stability against coking found on the NiCo surface can be summarized into two key factors: (1) the role of Co weakening the bond between a Ni active site and coke (2) significantly high surface coke diffusion rate on NiCo. Moreover, the calculation of the surface fraction weighted rate of coke diffusion which modeled the real NiCo particle into four regions: Ni-dominant, Co-dominant, NiCo-dominant, and the mixed region consisting a comparable amount of the former there regions, have shown that the synthesis of a NiCo particle should be dominated with NiCo region while keeping the Ni-dominant, and Co-dominant regions to be as low as possible to facilitate coke diffusion and removal. Thus, to effectively utilize the coke-resistant property of NiCo catalyst for DRM, one should together combine its high coke diffusion rate with coke removal mechanisms such as oxidation or hydrogenation, especially at the final diffusion site, to ensure that there will not be enough coke at the final site that will cause back-diffusion.

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Thermal-stable Pd@mesoporous silica core-shell nanocatalysts for dry reforming of methane with good coke-resistant performance

Cited by 70 publications

References 29 publications

Core–shell structured catalysts for thermocatalytic, photocatalytic, and electrocatalytic conversion of CO₂

Core–shell structured catalysts for thermocatalytic, photocatalytic, and electrocatalytic conversion of CO₂

Sintering and Coke Resistant Core/Yolk Shell Catalyst for Hydrocarbon Reforming

Experimental and computational investigation on underlying factors promoting high coke resistance in NiCo bimetallic catalysts during dry reforming of methane

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Thermal-stable Pd@mesoporous silica core-shell nanocatalysts for dry reforming of methane with good coke-resistant performance

Cited by 70 publications

References 29 publications

Core–shell structured catalysts for thermocatalytic, photocatalytic, and electrocatalytic conversion of CO2

Core–shell structured catalysts for thermocatalytic, photocatalytic, and electrocatalytic conversion of CO2

Sintering and Coke Resistant Core/Yolk Shell Catalyst for Hydrocarbon Reforming

Experimental and computational investigation on underlying factors promoting high coke resistance in NiCo bimetallic catalysts during dry reforming of methane

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Product

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Core–shell structured catalysts for thermocatalytic, photocatalytic, and electrocatalytic conversion of CO₂

Core–shell structured catalysts for thermocatalytic, photocatalytic, and electrocatalytic conversion of CO₂