Transition metal and Pr co-doping induced oxygen vacancy in Pd/CeO2 catalyst boosts low-temperature CO oxidation

Deng, Yanbo; Fu, Lian; Song, Wook; Ouyang, Like; Yuan, Shaojun

doi:10.1016/j.seppur.2023.123247

Cited by 15 publications

(4 citation statements)

References 66 publications

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“…DFT studies confirmed the presence of isolated Pd species (Pd 1 O) in the Pd/CeO 2 –NC catalyst as well. The codoping of Fe and Pr resulted in improved properties of Pd/CeO 2 –NR catalyst for CO oxidation . The obtained T 99 values for CO oxidation are 190 and 165 °C under dry and wet conditions over a single-doped Pd/Pr-CeO 2 catalyst, respectively.…”

Section: Metal or Metal Oxide Nanoparticles Supported On Shape-contro...mentioning

confidence: 90%

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Review of Shape-Controlled CeO₂ Nanocatalysts for Purification of Auto-Exhaust Pollutants

Putla,

Kamali,

Swapna

et al. 2024

ACS Appl. Nano Mater.

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CeO2 (cerium dioxide or ceria) is a versatile material for industrial catalysis because of its reversible Ce4+/Ce3+ redox pair and tunable oxygen vacancies. Purification of air pollutants released from vehicles and stationary chemical industries is one of the imperative catalytic applications of CeO2. In this regard, significant efforts have been made to improve the properties of CeO2 by precisely controlling its’ particle shape. This fascinating shape-controlled strategy can stabilize the surface-enriched crystal facets with excellent redox properties, abundant surface oxygen vacancies, enhanced active-site accessibility, and high catalytic activities. The synergistic effect of doping and deposition of transition metals in improving the structure–activity properties of shape-controlled ceria is also unraveled for air pollution control. Thus, this review aims to summarize and elucidate the advances in the field of catalytic air pollution control using shape-controlled ceria-based nanomaterials. The adverse effects of four types of air pollutants, namely carbon monoxide, soot particulates, nitrogen oxides, and volatile organic compounds, while emphasizing the drawbacks and challenges associated with the current technologies were briefly provided. The role of various doped metals (Zr, Ti, Mn, Co, Fe, Ni, etc.) and deposited metals (Au, Pt, Pd, Ru, Ag, Cu, Mn, etc.) associated with the well-defined morphologies (rods, cubes, tubes, polyhedra, spheres, fibers, etc.) of ceria for air pollution control was meticulously discussed. We hope that this timely important review can provide promising strategies for the rational design of advanced ceria-based catalysts not only for air pollution control but also for important energy-related applications.

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Section: Metal or Metal Oxide Nanoparticles Supported On Shape-contro...mentioning

confidence: 90%

Section: Metal or Metal Oxide Nanoparticles Supported On Shape-contro...mentioning

confidence: 99%

Review of Shape-Controlled CeO₂ Nanocatalysts for Purification of Auto-Exhaust Pollutants

Putla,

Kamali,

Swapna

et al. 2024

ACS Appl. Nano Mater.

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“…CO can also cause extreme damage to the human health because CO has a high affinity for hemoglobin, which is well known to cause poisoning at high concentrations. Furthermore, CO acts as a precursor to ground-level ozone, leading to the potential for severe respiratory irritation [ 3 , 4 , 5 ]. Therefore, the removal of CO has received a lot of public attention.…”

Section: Introductionmentioning

confidence: 99%

“…Considering these advantages, the catalytic oxidation of CO is considered a promising route to eliminate CO [ 9 , 10 ]. Regarding CO oxidation, its catalyst systems can be roughly divided into noble metal catalysts (such as Au [ 11 ], Pd [ 3 ], Pt [ 12 ], Rh [ 13 ], Ag [ 14 ], etc.) and non-noble metal catalysts (such as ZrO 2 [ 15 ], MnO 2 [ 16 ], CeO 2 [ 17 ], Co 3 O 4 [ 18 ], CuO [ 7 ], etc.).…”

Section: Introductionmentioning

confidence: 99%

Constructing Efficient CuO-Based CO Oxidation Catalysts with Large Specific Surface Area Mesoporous CeO2 Nanosphere Support

Zhang,

Zhao,

Yang

et al. 2024

Nanomaterials

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CeO2 is an outstanding support commonly used for the CuO-based CO oxidation catalysts due to its excellent redox property and oxygen storage–release property. However, the inherently small specific surface area of CeO2 support restricts the further enhancement of its catalytic performance. In this work, the novel mesoporous CeO2 nanosphere with a large specific surface area (~190.4 m2/g) was facilely synthesized by the improved hydrothermal method. The large specific surface area of mesoporous CeO2 nanosphere could be successfully maintained even at high temperatures up to 500 °C, exhibiting excellent thermal stability. Then, a series of CuO-based CO oxidation catalysts were prepared with the mesoporous CeO2 nanosphere as the support. The large surface area of the mesoporous CeO2 nanosphere support could greatly promote the dispersion of CuO active sites. The effects of the CuO loading amount, the calcination temperature, mesostructure, and redox property on the performances of CO oxidation were systematically investigated. It was found that high Cu+ concentration and lattice oxygen content in mesoporous CuO/CeO2 nanosphere catalysts greatly contributed to enhancing the performances of CO oxidation. Therefore, the present mesoporous CeO2 nanosphere with its large specific surface area was considered a promising support for advanced CO oxidation and even other industrial catalysts.

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Exploring the Impact of Oxygen Vacancies in Co/Pr‐CeO₂ Catalysts on H₂ Production via the Water‐Gas Shift Reaction

Saini,

Koley,

Damma

et al. 2024

Chemistry An Asian Journal

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In this study, we utilized various Pr‐doped CeO2 catalysts (Pr=5, 10, 20, and 30 wt.%) as a support medium for the dispersion of cobalt (Co) nanoparticles, aiming to investigate the impact of oxygen vacancies on the water‐gas shift (WGS) reaction. Different characterization techniques were employed to understand the insights into the structure‐activity relationship governing the performance of Pr doped ceria supported Co catalysts towards WGS reaction. Our findings reveal that Co/Pr‐CeO2 catalysts at optimum Pr loading (10 wt.%) exhibit a superior CO conversion (88%) facilitated by the presence of more oxygen vacancies induced by Pr doping into the CeO2 lattice, as opposed to the performance of the pure Co/CeO2 catalytic system. It was also found that the highest activity was obtained at increased intrinsic oxygen vacancies and strong synergy between Co and Pr/CeO2 support, fostering more favorable CO activation at the interfacial sites, thus accounting for the observed enhanced activity.

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Transition metal and Pr co-doping induced oxygen vacancy in Pd/CeO2 catalyst boosts low-temperature CO oxidation

Cited by 15 publications

References 66 publications

Review of Shape-Controlled CeO₂ Nanocatalysts for Purification of Auto-Exhaust Pollutants

Review of Shape-Controlled CeO₂ Nanocatalysts for Purification of Auto-Exhaust Pollutants

Constructing Efficient CuO-Based CO Oxidation Catalysts with Large Specific Surface Area Mesoporous CeO2 Nanosphere Support

Exploring the Impact of Oxygen Vacancies in Co/Pr‐CeO₂ Catalysts on H₂ Production via the Water‐Gas Shift Reaction

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Transition metal and Pr co-doping induced oxygen vacancy in Pd/CeO2 catalyst boosts low-temperature CO oxidation

Cited by 15 publications

References 66 publications

Review of Shape-Controlled CeO2 Nanocatalysts for Purification of Auto-Exhaust Pollutants

Review of Shape-Controlled CeO2 Nanocatalysts for Purification of Auto-Exhaust Pollutants

Constructing Efficient CuO-Based CO Oxidation Catalysts with Large Specific Surface Area Mesoporous CeO2 Nanosphere Support

Exploring the Impact of Oxygen Vacancies in Co/Pr‐CeO2 Catalysts on H2 Production via the Water‐Gas Shift Reaction

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Review of Shape-Controlled CeO₂ Nanocatalysts for Purification of Auto-Exhaust Pollutants

Review of Shape-Controlled CeO₂ Nanocatalysts for Purification of Auto-Exhaust Pollutants

Exploring the Impact of Oxygen Vacancies in Co/Pr‐CeO₂ Catalysts on H₂ Production via the Water‐Gas Shift Reaction