Synergistic Pt-CeO2 interface boosting low temperature dry reforming of methane

Shen, Dongyang; Li, Zhe; Shan, Jie; Yu, Guowang; Wang, Xiaoyan; Zhang, Yuhua; Liu, Chengchao; Lyu, Shuai; Li, Jinlin; Li, Lin

doi:10.1016/j.apcatb.2022.121809

Cited by 82 publications

(47 citation statements)

References 81 publications

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“…Such results pertain to several supports, including zeolites, CeO 2 , and TiO 2, and to multiple catalytic reactions, including oxidations, hydrogenation of 3-nitrostyrene, and photocatalytic hydrogen evolution. [7,70] Several researchers [13][14][15][16][18][19][20] have reported high methane reforming activity for catalysts containing atomically dispersed metals, including nickel, platinum, and ruthenium, but in some of these investigations, [13,14,16] a H 2 reduction pretreatment of the atomically dispersed catalysts gave catalysts containing a fraction (sometimes small) of metal clusters that could have been the catalytic species. The characterizations of used catalysts in other reports [15,19,20] leave open the possibility that metal aggregation occurred during catalysis.…”

Section: Discussionmentioning

confidence: 99%

“…[7,70] Several researchers [13][14][15][16][18][19][20] have reported high methane reforming activity for catalysts containing atomically dispersed metals, including nickel, platinum, and ruthenium, but in some of these investigations, [13,14,16] a H 2 reduction pretreatment of the atomically dispersed catalysts gave catalysts containing a fraction (sometimes small) of metal clusters that could have been the catalytic species. The characterizations of used catalysts in other reports [15,19,20] leave open the possibility that metal aggregation occurred during catalysis. Thus, our results suggest that efforts to synthesize atomically dispersed metals that are stable and do not agglomerate even under reducing environments [71] may sometimes be counterproductive.…”

Section: Discussionmentioning

confidence: 99%

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Genesis of Active Pt/CeO₂ Catalyst for Dry Reforming of Methane by Reduction and Aggregation of Isolated Platinum Atoms into Clusters

Das

Anjum

Lim

et al. 2023

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Atomically dispersed metal catalysts offer the advantages of efficient metal utilization and high selectivities for reactions of technological importance. Such catalysts have been suggested to be strong candidates for dry reforming of methane (DRM), offering prospects of high selectivity for synthesis gas without coke formation, which requires ensembles of metal sites and is a challenge to overcome in DRM catalysis. However, investigations of the structures of isolated metal sites on metal oxide supports under DRM conditions are lacking, and the catalytically active sites remain undetermined. Data characterizing the DRM reaction‐driven structural evolution of a cerium oxide‐supported catalyst, initially incorporating atomically dispersed platinum, and the corresponding changes in catalyst performance are reported. X‐ray absorption and infrared spectra show that the reduction and agglomeration of isolated cationic platinum atoms to form small platinum clusters/nanoparticles are necessary for DRM activity. Density functional theory calculations of the energy barriers for methane dissociation on atomically dispersed platinum and on platinum clusters support these observations. The results emphasize the need for in‐operando experiments to assess the active sites in such catalysts. The inferences about the catalytically active species are suggested to pertain to a broad class of catalytic conversions involving the rate‐limiting dissociation of light alkanes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Genesis of Active Pt/CeO₂ Catalyst for Dry Reforming of Methane by Reduction and Aggregation of Isolated Platinum Atoms into Clusters

Das

Anjum

Lim

et al. 2023

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“…Recently, Shen et al synthesized a Pt/CeO 2 catalyst with Pt atomically dispersed on a CeO 2 nanorod, and this SAC exhibited DRM reactivity at a relatively low operating temperature (350°C). [ 125 ] As a support material with a high density of defects on its surface, CeO 2 helped to stabilize the Pt atoms and build the metal‐support interface between Pt and Ce. The Pt–CeO 2 interface enhanced the activation of CH 4 and dissociation of CO 2 contributing to relatively great DRM reactivity at low temperatures.…”

Section: Catalyst Design From Active Metalmentioning

confidence: 99%

“…(A) High-angle annular dark field transmission electron microscope (HAADF-STEM) images of SAC and (B) catalytic activity of Pt/CeO 2 SAC at different operational temperatures. Reproduced with permission from Shen et al [125] Copyright 2022 Elsevier B.V. [131] Copyright 2019 American Chemical Society.…”

Section: Size Effect Of Active Metalsmentioning

confidence: 99%

A review on catalyst development for conventional thermal dry reforming of methane at low temperature

Zhou

Mahinpey

2023

Can J Chem Eng

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Carbon dioxide (CO 2 ) utilization and conversion, as one of the main parts of carbon capture, utilization, and storage (CCUS), is not only considered an important way to mitigate global warming but also an attractive industrial route to produce valuable fuels and chemical feedstocks. Catalytic dry reforming of methane (DRM) is a promising technology for carbon dioxide utilization and conversion as it can produce syngas, carbon monoxide (CO), and hydrogen (H 2 ) for widespread industrial production processes. In most studies of the DRM reaction, a relatively high operational temperature (i.e., >700 C) has been applied since the reactivity limitation of widely used Ni-based catalysts at low temperatures and the extremely endothermic property of the DRM reaction. However, high cost and high requirement of thermal stability for catalysts have become a severe problem impeding the further commercialization of DRM technology. Decreasing the operational temperature (i.e., <700 C) is considered a promising way for further application of the DRM route to convert CO 2 and produce syngas. However, traditional Ni-based catalysts suffered from unsatisfied reactivity and severe coke formation, leading to quick deactivation at low temperatures. Developing a catalyst with excellent catalytic activity, coke resistance, and improved thermal stability is necessary for low-temperature DRM reactions. In recent years, with significant development in materials, catalyst design, and computational simulation, some synthesized catalysts have achieved considerable improvement in catalytic performance in low-temperature DRM. Hence, a review of recent development on low-temperature DRM catalysts is provided here to further guide and profoundly understand catalyst design for low-temperature DRM.

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“…Efforts have been exerted to develop novel catalysts that can increase CO 2 and CH 4 activities at low temperatures. Nickel is the most prevalent metal-based catalyst because of its abundancy and low cost, making it suitable for industrial catalytic processes; however, Ni is rapidly deactivated because of high carbon formation from side reactions, either methane cracking or CO disproportionation [ 105 , 106 ] Noble metals, such as Pd [ 106 ], Ru, and Pt [ 107 , 108 , 109 , 110 ], are suggested to replace Ni because they are highly resistant to carbon formation. However, their expensiveness restricts their promising properties in the larger market.…”

Section: Co 2 Conversion Processes and Productsmentioning

confidence: 99%

Recent Application of Core-Shell Nanostructured Catalysts for CO2 Thermocatalytic Conversion Processes

et al. 2022

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Carbon-intensive industries must deem carbon capture, utilization, and storage initiatives to mitigate rising CO2 concentration by 2050. A 45% national reduction in CO2 emissions has been projected by government to realize net zero carbon in 2030. CO2 utilization is the prominent solution to curb not only CO2 but other greenhouse gases, such as methane, on a large scale. For decades, thermocatalytic CO2 conversions into clean fuels and specialty chemicals through catalytic CO2 hydrogenation and CO2 reforming using green hydrogen and pure methane sources have been under scrutiny. However, these processes are still immature for industrial applications because of their thermodynamic and kinetic limitations caused by rapid catalyst deactivation due to fouling, sintering, and poisoning under harsh conditions. Therefore, a key research focus on thermocatalytic CO2 conversion is to develop high-performance and selective catalysts even at low temperatures while suppressing side reactions. Conventional catalysts suffer from a lack of precise structural control, which is detrimental toward selectivity, activity, and stability. Core-shell is a recently emerged nanomaterial that offers confinement effect to preserve multiple functionalities from sintering in CO2 conversions. Substantial progress has been achieved to implement core-shell in direct or indirect thermocatalytic CO2 reactions, such as methanation, methanol synthesis, Fischer–Tropsch synthesis, and dry reforming methane. However, cost-effective and simple synthesis methods and feasible mechanisms on core-shell catalysts remain to be developed. This review provides insights into recent works on core-shell catalysts for thermocatalytic CO2 conversion into syngas and fuels

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Synergistic Pt-CeO2 interface boosting low temperature dry reforming of methane

Cited by 82 publications

References 81 publications

Genesis of Active Pt/CeO₂ Catalyst for Dry Reforming of Methane by Reduction and Aggregation of Isolated Platinum Atoms into Clusters

Genesis of Active Pt/CeO₂ Catalyst for Dry Reforming of Methane by Reduction and Aggregation of Isolated Platinum Atoms into Clusters

A review on catalyst development for conventional thermal dry reforming of methane at low temperature

Recent Application of Core-Shell Nanostructured Catalysts for CO2 Thermocatalytic Conversion Processes

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Synergistic Pt-CeO2 interface boosting low temperature dry reforming of methane

Cited by 82 publications

References 81 publications

Genesis of Active Pt/CeO2 Catalyst for Dry Reforming of Methane by Reduction and Aggregation of Isolated Platinum Atoms into Clusters

Genesis of Active Pt/CeO2 Catalyst for Dry Reforming of Methane by Reduction and Aggregation of Isolated Platinum Atoms into Clusters

A review on catalyst development for conventional thermal dry reforming of methane at low temperature

Recent Application of Core-Shell Nanostructured Catalysts for CO2 Thermocatalytic Conversion Processes

Contact Info

Product

Resources

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Genesis of Active Pt/CeO₂ Catalyst for Dry Reforming of Methane by Reduction and Aggregation of Isolated Platinum Atoms into Clusters

Genesis of Active Pt/CeO₂ Catalyst for Dry Reforming of Methane by Reduction and Aggregation of Isolated Platinum Atoms into Clusters