Understanding the nature of Pt-Rh synergy for three-way conversion catalysis

Li, Yuejin; Low, Kain Lu; Sundermann, Andreas; Zhu, Hai‐Liang; Betancourt, Luís; Kang, Chansoon; Johnson, Shantel; Xie, Shaohua

doi:10.1016/j.apcatb.2023.122821

Cited by 3 publications

(4 citation statements)

References 28 publications

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“…For bimetallic or polymetallic catalytic materials, figuring out how to make them into alloys is certainly an interesting route, but due to the difficulty of their synthesis and room temperature thermodynamic instability, many studies have been carried out from phase-separated metallic materials in which Pt, Rh and Pd are immiscible with each other. [65][66][67][68][69] Li and his co-workers investigated the synergistic effect of PtRh-loaded alumina with different Pt: Rh ratios in threeway catalysts. The catalysts were prepared by impregnating different contents of Pt and Rh on alumina and then calcined at 550°C for 2h subsequently (Figure 8a).…”

Section: Phase Separation Metallic Actives Centermentioning

confidence: 99%

“…The catalysts were prepared by impregnating different contents of Pt and Rh on alumina and then calcined at 550°C for 2h subsequently (Figure 8a). [66] Among them, the 2Pt0.5Rh material contained three forms of Rh presence on the aged surface: small Rh nanoparticles on island-shaped Pt particles, Rh nanoparticles on supports, and Rh singleatoms on supports. They found that a synergistic effect could only be achieved if Pt and Rh were in contact with each other.…”

Section: Phase Separation Metallic Actives Centermentioning

confidence: 99%

mentioning

confidence: 99%

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Recent progress of Rh‐based three‐way catalysts

Jiang,

Wang,

Liu

et al. 2024

Smart Molecules

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Three‐way catalysts are widely used to control criterion pollutant emissions from the increasing gasoline engines. With the stringent requirements of automotive pollutant emission standards in various countries, Rh has become an irreplaceable component of three‐way catalysts due to its superior NOx elimination, high N2 selectivity, and simultaneous elimination of CO and hydrocarbons. In this review, we systematically review the recent development of Rh‐based three‐way catalysts in terms of potential supports and effective active center construction strategies. We further summarize the key role of Rh metal in the three‐way catalytic mechanism and reaction kinetics. Finally, we conclude the current challenges and future opportunities facing Rh‐based catalysts. It is believed that based on the deep understanding of Rh‐based three‐way catalysts, the design of Rh‐based catalysts with good low‐temperature catalytic performance and low cost is expected to be realized in the future.

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Section: Phase Separation Metallic Actives Centermentioning

confidence: 99%

Section: Phase Separation Metallic Actives Centermentioning

confidence: 99%

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Recent progress of Rh‐based three‐way catalysts

Jiang,

Wang,

Liu

et al. 2024

Smart Molecules

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“…Reducing pollutants remains a critical, ongoing challenge in activities producing harmful substances. In the realm of mobile applications, three-way catalysts (TWCs) have played a pivotal role in curbing pollutant emissions from gasoline-powered vehicles. − While platinum group metal (PGM) nanoparticles have been widely used in TWCs, their adoption has been restricted due to their high cost and limited availability. Hence, the pursuit of alternative catalytic materials, leveraging cost-effective and abundant transition metals, has garnered significant interest. − Investigations into various metals’ efficacy, including Cu, − Ni, − and Co − have been conducted.…”

Section: Introductionmentioning

confidence: 99%

Selective Formation of Cu Active Sites with Different Coordination States on Pseudospinel CuAl₂O₄ and Their NO Reduction Catalysis

Okuda,

Furuyama,

Sakai

et al. 2024

ACS Omega

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In the spinel framework, copper (Cu) in two distinct coordination states exhibits catalytic activity for NO reduction through different mechanisms. However, detailed exploration of their respective catalytic properties, such as the redox behavior of Cu and substrate molecule adsorption, has been challenging due to difficulties in their separate formation. In this study, we present the controlled formation of pseudospinel CuAl 2 O 4 , containing exclusively tetrahedrally or octahedrally coordinated Cu, achieved by manipulating aging temperature and O 2 concentration. Through these materials, we observed that in the CO−NO reaction, the step primarily determining the rate differs: NO reduction dominates with octahedrally coordinated Cu, whereas carbon monoxide (CO) oxidation is prominent with tetrahedrally coordinated Cu. The lower coordination number of Cu significantly benefits NO reduction but negatively impacts the CO−NO reaction, albeit positively influencing NO reduction in three-way catalytic reactions.

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Efficient photo-thermal catalytic CO2 methanation and dynamic structural evolution over Ru/Mg-CeO2 single-atom catalyst

Zhang,

Li,

Sun

et al. 2024

Journal of Catalysis

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Understanding the nature of Pt-Rh synergy for three-way conversion catalysis

Cited by 3 publications

References 28 publications

Recent progress of Rh‐based three‐way catalysts

Recent progress of Rh‐based three‐way catalysts

Selective Formation of Cu Active Sites with Different Coordination States on Pseudospinel CuAl₂O₄ and Their NO Reduction Catalysis

Efficient photo-thermal catalytic CO2 methanation and dynamic structural evolution over Ru/Mg-CeO2 single-atom catalyst

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Understanding the nature of Pt-Rh synergy for three-way conversion catalysis

Cited by 3 publications

References 28 publications

Recent progress of Rh‐based three‐way catalysts

Recent progress of Rh‐based three‐way catalysts

Selective Formation of Cu Active Sites with Different Coordination States on Pseudospinel CuAl2O4 and Their NO Reduction Catalysis

Efficient photo-thermal catalytic CO2 methanation and dynamic structural evolution over Ru/Mg-CeO2 single-atom catalyst

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Product

Resources

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Selective Formation of Cu Active Sites with Different Coordination States on Pseudospinel CuAl₂O₄ and Their NO Reduction Catalysis