Confinement of subnanometric PdCo bimetallic oxide clusters in zeolites for methane complete oxidation

Tang, Xuan; Lou, Yang; Zhao, Ruipeng; Tang, Bingjing; Guo, Wenyi; Guo, Yanglong; Wang, Zhan; Jia, Yanyan; Wang, Li; Dai, Sheng; Guo, Yun

doi:10.1016/j.cej.2021.129398

Cited by 47 publications

(21 citation statements)

References 37 publications

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“…66 Apart from bi-noble-metallic catalysts, some other types of bimetallic catalysts were also investigated. Tang et al 67 discovered that Pd-Co@MFI bimetallic catalyst exhibited superior activity compared to Pd@MFI catalyst. The addition of Co to Pd@MFI catalyst could enhance the electronic density of Pd species via transferring the electron from cobalt to palladium, resulting in facilitation of the PdO-Pd redox cycle.…”

Section: Mixed Mechanismmentioning

confidence: 99%

Catalytic Combustion of Methane: From Mechanism and Materials Properties to Catalytic Performance

et al. 2022

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Catalytic combustion of methane is a promising way of eliminating fugitive methane emissions to meet the rising requirement of the wide application of natural gas vehicles. The performance of catalysts for methane combustion has been found to be significantly affected by the variety of lattice defects, oxygen vacancies, and metal−support interactions which are connected with the category, morphology, and crystal type of both active components and supports. Choices of additives and preparation methods also play important roles in the catalytic combustion of methane. In this Review, we highlight the recent progress in the development and understanding of catalytic combustion of methane. Distinct mechanisms regarding catalytic combustion of methane, including the Langmuir−Hinshelwood mechanism, the Eley−Rideal mechanism, and the Mars−van Krevelen mechanism, are first discussed. The effects of active components, supports, additives, and preparation methods on the properties of catalysts for methane combustion are then analyzed. From a practical point of view, the effects of the components of exhaust gas, which include carbon dioxide, water, sulfur compounds, and nitrogencontaining compounds, are also discussed. Finally, we provide a summary regarding the current situation and future prospects for the catalytic combustion of methane.

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Section: Mixed Mechanismmentioning

confidence: 99%

Catalytic Combustion of Methane: From Mechanism and Materials Properties to Catalytic Performance

et al. 2022

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“…The high reaction barrier of C-H bond generally requires a lot of energy consumption during the reaction but the photogenerated electrons and holes can efficiently facilitate the activation of methane C-H bonds and form intermediates (like methyl radicals), which can efficiently decrease the energy input during the reforming process and provide a new way for low-temperature methane conversion. [41][42][43]45,121,[191][192][193][194][195] By using hydrogen peroxide as oxidants, the FeO x / TiO 2 catalyst enables to realize the conversion of methane to methanol with a high selectivity under ambient environment with the help of Xe lamp. 196 The synthesized 0.33 wt% FeO x /TiO 2 catalyst shows that both FeOOH and Fe 2 O 3 act as the active sites for methane oxidation to methanol, which also improves the electron-hole separation.…”

Section: Photocatalytic Methane Direct Conversionmentioning

confidence: 99%

Research progress on methane conversion coupling photocatalysis and thermocatalysis

et al. 2021

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Conversion of methane into value-added chemicals is of significance for methane utilization and industrial demand of primary chemical products. The barrier associated with the nonpolar structure of methane and the high bond energy C-H bond (4.57 eV) makes it difficult to realize methane conversion and activation under mild conditions. The photothermal synergetic strategy by combining photon energy and thermo energy provides an advanced philosophy to achieve efficient methane conversion. In this review, we overview the current pioneering studies of photothermal methane indirect conversion and present the methane direct conversion by the way of photocatalysis and thermocatalysis to provide a fundamental understanding of methane activation. Finally, we end this review with a discussion on the remaining challenges and perspectives of methane direct conversion over single-atom catalysts via photothermal synergetic strategy.

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Section: Thermocatalytic Activation Of Methanementioning

confidence: 99%

Current Progress on Methods and Technologies for Catalytic Methane Activation at Low Temperatures

et al. 2022

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Methane (CH 4 ) is an attractive energy source and important greenhouse gas. Therefore, from the economic and environmental point of view, scientists are working hard to activate and convert CH 4 into various products or less harmful gas at low-temperature. Although the inert nature of C-H bonds requires high dissociation energy at high temperatures, the efforts of researchers have demonstrated the feasibility of catalysts to activate CH 4 at low temperatures. In this review, the efficient catalysts designed to reduce the CH 4 oxidation temperature and improve conversion efficiencies are described. First, noble metals and transition metal-based catalysts are summarized for activating CH 4 in temperatures ranging from 50 to 500 °C. After that, the partial oxidation of CH 4 at relatively low temperatures, including thermocatalysis in the liquid phase, photocatalysis, electrocatalysis, and nonthermal plasma technologies, is briefly discussed. Finally, the challenges and perspectives are presented to provide a systematic guideline for designing and synthesizing the highly efficient catalysts in the complete/partial oxidation of CH 4 at low temperatures.

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Confinement of subnanometric PdCo bimetallic oxide clusters in zeolites for methane complete oxidation

Cited by 47 publications

References 37 publications

Catalytic Combustion of Methane: From Mechanism and Materials Properties to Catalytic Performance

Catalytic Combustion of Methane: From Mechanism and Materials Properties to Catalytic Performance

Research progress on methane conversion coupling photocatalysis and thermocatalysis

Current Progress on Methods and Technologies for Catalytic Methane Activation at Low Temperatures

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