Impact of Pd:Pt ratio of Pd/Pt bimetallic catalyst on CH4 oxidation

Park, Jiseok; Kim, Dongjoon; Byun, Sang Woo; Shin, Hyeonwoo; Ju, Yanggeun; Min, Hae-Hyun; Kim, Young Jin; Heo, Iljeong; Hazlett, Melanie J.; Kim, Minkyu; Kang, Sung Bong

doi:10.1016/j.apcatb.2022.121623

Cited by 36 publications

(11 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The adverse peak at 63 °C is due to H 2 release from Pd−H. 36 Because the Pd x+ reduction peak is usually observed below 50 °C according to the literature, 37 the peak at 295 °C is attributed to the reduction of lattice oxygen. In comparison to the H 2 -TPR profile of pure ZrO 2 , lattice oxygen in ZrO 2 is activated as a result of metal−support interactions.…”

Section: Resultsmentioning

confidence: 99%

Novel Insights on the Metal–Support Interactions of Pd/ZrO₂ Catalysts on CH₄ Oxidation

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

With the environmental harm of unburnt CH4 in natural gas vehicle exhaust, oxidizing CH4 to CO2 over catalysts at low temperatures becomes an exigent issue. Supported Pd catalysts possess higher CH4 activity than other noble metal catalysts. A series of Pd/ZrO2 catalysts were synthesized to research the potential relationship among Pd particle morphology, electron transfer, CH4 oxidation mechanism, and catalytic activity. Characterizations show that the ratio of PdO x facets to edge/corner sites on four catalysts increases in the order of PZ85 ≈ PZ40 < PZ55 < PZ70 because of the difference in content of surface −OH groups, and this order turns out to be the same as that of electron transfer intensity, revealing the degree of metal–support interactions. This kind of metal–support interaction in PZ70 can be helpful to accelerate CH4 combustion via promoting the break of the C–H bond and dissociation of CO3* according to density functional theory studies. T 90 of the PZ70 catalyst with optimum catalytic activity reaches 331 °C.

show abstract

Section: Resultsmentioning

confidence: 99%

Novel Insights on the Metal–Support Interactions of Pd/ZrO₂ Catalysts on CH₄ Oxidation

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…124 Park et al explored the energetics of key steps in the methane oxidation reaction under steady-state conditions, examining the adsorption of methane and oxygen, as well as the effects of C−H bond breaking and adsorbed H 2 O, using DFT calculations. 125 Meanwhile, Tang et al demonstrated distinctive trends in C−H bond activation at the Cu 1 −O 4 site. 122 They found that the C−H bond of CH 4 is more easily activated than that of CH 3 OH, leading to the highly selective production of C 1 oxygenated compounds, particularly methanol.…”

Section: Study On the Formation Of Surface Reactivementioning

confidence: 99%

“…Another investigation by Li et al employed a microkinetic model that accounted for surface coverage effects to illustrate the catalytic mechanism and identify the rate-determining step . Park et al explored the energetics of key steps in the methane oxidation reaction under steady-state conditions, examining the adsorption of methane and oxygen, as well as the effects of C–H bond breaking and adsorbed H 2 O, using DFT calculations . Meanwhile, Tang et al demonstrated distinctive trends in C–H bond activation at the Cu 1 –O 4 site .…”

Section: Application Of Dft Calculation In Environmental Catalysis Fo...mentioning

confidence: 99%

Recent Progress on Density Functional Theory Calculations for Catalytic Control of Air Pollution

Ma,

Xiong,

Zhang

et al. 2023

ACS EST Eng.

View full text Add to dashboard Cite

With the urgent demand for environmental protection and sustainable development, the field of environmental catalysis has received increasing attention. The further development of environmental catalysis is limited by the understanding of reaction processes at the atomic and molecular levels. It has become a research tendency to apply theoretical calculations to assist research in the field of air pollution control. Density functional theory (DFT) calculations have been utilized to research the surface structural characteristics of catalysts, explore the mechanisms of catalytic reactions, and design suitable catalysts for environmental catalysis applications. This Review provides an overview of the basic approach of DFT calculations. Specific applications of DFT in environmental catalysis, focusing on oxide catalysts, are extensively explored, including CO oxidation, volatile organic compound (VOC) oxidation, NO x reduction, soot oxidation, and other reactions. Finally, we point out the challenges associated with DFT and potential future prospects in the battle to control air pollution. This Review paves the way for the further design of efficient and stable catalytic materials.

show abstract

“…Several attempts had been made to enhance the water resistance, including modification of catalyst components and structures, addition of water adsorbent, and so on. Various bimetallic catalysts exhibited higher stability than Pd catalysts in the presence of water vapor and showed stability after a long process of mild aging treatment. ,,,− Some special structures showed superior water-resistant ability, including Pd-NiCo 2 O 4 catalyst with Pd inserted into the NiCo 2 O 4 lattice, Pt-Pd/CeO 2 bimetallic catalyst prepared by ball-milling with mushroom-like structure of Pt-Pd phase in the aged catalyst, and Pd catalysts encapsuled in a core–shell structure. , Addition of extra water adsorbent was also a method to enhance water resistance. Huang et al discovered that the dilution of Pd/CeO 2 with CaO caused a 5-fold increase in activity compared to Pd/CeO 2 catalysts, and the enhancement could last for over 10 h on stream.…”

Section: Atmospherementioning

confidence: 99%

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

et al. 2022

View full text Add to dashboard Cite

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.

show abstract

Impact of Pd:Pt ratio of Pd/Pt bimetallic catalyst on CH4 oxidation

Cited by 36 publications

References 44 publications

Novel Insights on the Metal–Support Interactions of Pd/ZrO₂ Catalysts on CH₄ Oxidation

Novel Insights on the Metal–Support Interactions of Pd/ZrO₂ Catalysts on CH₄ Oxidation

Recent Progress on Density Functional Theory Calculations for Catalytic Control of Air Pollution

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

Contact Info

Product

Resources

About

Impact of Pd:Pt ratio of Pd/Pt bimetallic catalyst on CH4 oxidation

Cited by 36 publications

References 44 publications

Novel Insights on the Metal–Support Interactions of Pd/ZrO2 Catalysts on CH4 Oxidation

Novel Insights on the Metal–Support Interactions of Pd/ZrO2 Catalysts on CH4 Oxidation

Recent Progress on Density Functional Theory Calculations for Catalytic Control of Air Pollution

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

Contact Info

Product

Resources

About

Novel Insights on the Metal–Support Interactions of Pd/ZrO₂ Catalysts on CH₄ Oxidation

Novel Insights on the Metal–Support Interactions of Pd/ZrO₂ Catalysts on CH₄ Oxidation