Dry reforming of methane on bimetallic Pt–Ni@CeO<sub>2</sub>catalyst: a<i>in situ</i>DRIFTS-MS mechanistic study

Chen, Huanhao; Chansai, Sarayute; Xu, Shaojun; Xu, Shanshan; Mu, Yibing; Hardacre, Christopher; Fan, Xiaolei

doi:10.1039/d1cy00382h

Cited by 37 publications

(25 citation statements)

References 39 publications

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“…Many reports have assigned the peaks of carbonaceous species. The assignment of carbonaceous species used for this study and their values in the literature are shown in ESI † 5,11,48–73 . We assigned peaks in the range of 1800–2100 cm −1 to carbonyl species adsorbed onto Pt, but they are not shown in the table.…”

Section: Resultsmentioning

confidence: 99%

“…The assignment of carbonaceous species used for this study and their values in the literature are shown in ESI. † 5,11, We assigned peaks in the range of 1800-2100 cm À1 to carbonyl species adsorbed onto Pt, but they are not shown in the table. In this measurement, we applied the EF to the catalyst in the CO 2 ow and compared the spectra before and aer the application of EF.…”

Section: Effects Of Ef On Co 2 Adsorptionmentioning

confidence: 99%

“…CO 2 dissociates on the active metal via carbonyl species [3][4][5][6] and supports oxides using oxygen vacancies via intermediates such as carbonate and formate. [7][8][9][10] Chen et al 11 reported that CO was formed via carbonate, which is adsorbed species of CO 2 using CeO 2 lattice oxygen defects, in DRM using Pt-Ni supported CeO 2 . Bobadilla et al 12 revealed that the reaction proceeds via formate species as the key intermediate in RWGS (reverse water gas shi) of Pt-loaded CeO 2 .…”

Section: Introductionmentioning

confidence: 99%

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Elucidation of the reaction mechanism on dry reforming of methane in an electric field by in situ DRIFTs

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Section: Resultsmentioning

confidence: 99%

Section: Effects Of Ef On Co 2 Adsorptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Elucidation of the reaction mechanism on dry reforming of methane in an electric field by in situ DRIFTs

et al. 2022

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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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“…Pt-based alloys and intermetallic compounds have been intensively studied because of their potential applications in magnetics 1 , electronics 2 , and particularly in catalysis 3,4,5,6,7 . Although effective, Pt is one of the most expensive catalysts.…”

Section: Toc Introductionmentioning

confidence: 99%

Synthesis and Characterization of Stable Cu-Pt Nanoparticles under Reductive and Oxidative Conditions

Foucher

Yang

Rosen

et al. 2023

Preprint

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We report a synthesis method for highly monodisperse Cu-Pt alloy nanospheres. Small and large Cu-Pt particles with a Cu:Pt ratio of 1:1 can be obtained through colloidal synthesis at 300 °C. The fresh particles have a Pt-rich surface and a Cu-rich core and can be converted into an intermetallic phase after annealing at 800 °C under H2. First, we demonstrated the stability of fresh particles under redox conditions at 400 °C, as the Pt-rich surface prevents substantial oxidation of Cu. Then, a combination of in situ scanning transmission electron microscopy, in situ X-ray absorption spectroscopy, and CO oxidation measurements of the intermetallic CuPt phase before and after redox treatments at 800 °C showed promising activity and stability for CO oxidation. Full oxidation of Cu was prevented after exposure to O2 at 800 °C. The activity and structure of the particles was only slightly changed after exposure to O2 at 800 °C and were recovered after re-reduction at 800 °C. Additionally, the intermetallic CuPt phase showed enhanced catalytic properties compared to the fresh particles with a Pt-rich surface or pure Pt particles of the same size. Thus, the incorporation of Pt with Cu does not lead to a rapid deactivation and degradation of the material, as seen with other bimetallic systems. This work provides a synthesis route to control the design of Cu-Pt nanostructures and underlines the promising properties of these alloys (intermetallic and non-intermetallic) for heterogeneous catalysis.

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Dry reforming of methane on bimetallic Pt–Ni@CeO₂catalyst: ain situDRIFTS-MS mechanistic study

Abstract: Bimetallic Pt-Ni catalysts can promote catalytic dry reforming of methane (DRM) with the improved activity and deactivtaion resistance compared to the relevant monometallic catalysts. Further development of the Pt-Ni catalyst...

Cited by 37 publications

References 39 publications

Elucidation of the reaction mechanism on dry reforming of methane in an electric field by in situ DRIFTs

Elucidation of the reaction mechanism on dry reforming of methane in an electric field by in situ DRIFTs

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

Synthesis and Characterization of Stable Cu-Pt Nanoparticles under Reductive and Oxidative Conditions

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Dry reforming of methane on bimetallic Pt–Ni@CeO2catalyst: ain situDRIFTS-MS mechanistic study

Abstract: Bimetallic Pt-Ni catalysts can promote catalytic dry reforming of methane (DRM) with the improved activity and deactivtaion resistance compared to the relevant monometallic catalysts. Further development of the Pt-Ni catalyst...

Cited by 37 publications

References 39 publications

Elucidation of the reaction mechanism on dry reforming of methane in an electric field by in situ DRIFTs

Elucidation of the reaction mechanism on dry reforming of methane in an electric field by in situ DRIFTs

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

Synthesis and Characterization of Stable Cu-Pt Nanoparticles under Reductive and Oxidative Conditions

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Dry reforming of methane on bimetallic Pt–Ni@CeO₂catalyst: ain situDRIFTS-MS mechanistic study