Ultrafine Pd species anchored on porous CeO2 nanobundles as a highly efficient catalyst for methane oxidation

Lei Li; Sutian Xue; Meijie Wei; Hui Yao; Yong Dai; Zhaoyang Fei

doi:10.1016/j.apsusc.2022.153909

Ultrafine Pd species anchored on porous CeO₂ nanobundles as a highly efficient catalyst for methane oxidation

Lei Li, Sutian Xue, Meijie Wei, Hui Yao, Yong Dai, Zhaoyang Fei

College of Chemical Engineering

Yancheng Institute of Technology

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

The design and development of efficient catalyst is very important for the removal of air pollutants through catalytic oxidation technology. Here, the Pd/CeO₂ catalysts were synthesized via in-situ thermal pyrolysis of Pd²⁺ doped Ce-MOF. The prepared Pd/CeO₂-NB catalyst exhibits nanobundles structure and highly dispersed Pd species, which shows superior performance in CO oxidation and CH₄ combustion at low temperature (<400 °C). The Raman, XPS, TPR and CO-IR reveal that the Pd/CeO₂-NB sample has a certain surface concentration of Pd⁰ species, and the formed Pd/PdO species boost the generation of oxygen vacancies, facilitating the dissociation of gas oxygen and the diffusion of lattice oxygen. Besides, possible reaction mechanism is also clarified by in-situ DRIFTS spectra, and main surface intermediate species (carbonate and carbon oxygenates) were confirmed. This study paves a way for the design of MOFs-based catalytic materials.

Original language	English
Article number	153909
Journal	Applied Surface Science
Volume	599
DOIs	https://doi.org/10.1016/j.apsusc.2022.153909
State	Published - 15 Oct 2022

Keywords

Catalytic oxidation
Ce-MOFs
Cerium
Pd species
Valence state

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title = "Ultrafine Pd species anchored on porous CeO2 nanobundles as a highly efficient catalyst for methane oxidation",

abstract = "The design and development of efficient catalyst is very important for the removal of air pollutants through catalytic oxidation technology. Here, the Pd/CeO2 catalysts were synthesized via in-situ thermal pyrolysis of Pd2+ doped Ce-MOF. The prepared Pd/CeO2-NB catalyst exhibits nanobundles structure and highly dispersed Pd species, which shows superior performance in CO oxidation and CH4 combustion at low temperature (<400 °C). The Raman, XPS, TPR and CO-IR reveal that the Pd/CeO2-NB sample has a certain surface concentration of Pd0 species, and the formed Pd/PdO species boost the generation of oxygen vacancies, facilitating the dissociation of gas oxygen and the diffusion of lattice oxygen. Besides, possible reaction mechanism is also clarified by in-situ DRIFTS spectra, and main surface intermediate species (carbonate and carbon oxygenates) were confirmed. This study paves a way for the design of MOFs-based catalytic materials.",

keywords = "Catalytic oxidation, Ce-MOFs, Cerium, Pd species, Valence state",

author = "Lei Li and Sutian Xue and Meijie Wei and Hui Yao and Yong Dai and Zhaoyang Fei",

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year = "2022",

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doi = "10.1016/j.apsusc.2022.153909",

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T1 - Ultrafine Pd species anchored on porous CeO2 nanobundles as a highly efficient catalyst for methane oxidation

AU - Li, Lei

AU - Xue, Sutian

AU - Wei, Meijie

AU - Yao, Hui

AU - Dai, Yong

AU - Fei, Zhaoyang

PY - 2022/10/15

Y1 - 2022/10/15

N2 - The design and development of efficient catalyst is very important for the removal of air pollutants through catalytic oxidation technology. Here, the Pd/CeO2 catalysts were synthesized via in-situ thermal pyrolysis of Pd2+ doped Ce-MOF. The prepared Pd/CeO2-NB catalyst exhibits nanobundles structure and highly dispersed Pd species, which shows superior performance in CO oxidation and CH4 combustion at low temperature (<400 °C). The Raman, XPS, TPR and CO-IR reveal that the Pd/CeO2-NB sample has a certain surface concentration of Pd0 species, and the formed Pd/PdO species boost the generation of oxygen vacancies, facilitating the dissociation of gas oxygen and the diffusion of lattice oxygen. Besides, possible reaction mechanism is also clarified by in-situ DRIFTS spectra, and main surface intermediate species (carbonate and carbon oxygenates) were confirmed. This study paves a way for the design of MOFs-based catalytic materials.

AB - The design and development of efficient catalyst is very important for the removal of air pollutants through catalytic oxidation technology. Here, the Pd/CeO2 catalysts were synthesized via in-situ thermal pyrolysis of Pd2+ doped Ce-MOF. The prepared Pd/CeO2-NB catalyst exhibits nanobundles structure and highly dispersed Pd species, which shows superior performance in CO oxidation and CH4 combustion at low temperature (<400 °C). The Raman, XPS, TPR and CO-IR reveal that the Pd/CeO2-NB sample has a certain surface concentration of Pd0 species, and the formed Pd/PdO species boost the generation of oxygen vacancies, facilitating the dissociation of gas oxygen and the diffusion of lattice oxygen. Besides, possible reaction mechanism is also clarified by in-situ DRIFTS spectra, and main surface intermediate species (carbonate and carbon oxygenates) were confirmed. This study paves a way for the design of MOFs-based catalytic materials.

KW - Catalytic oxidation

KW - Ce-MOFs

KW - Cerium

KW - Pd species

KW - Valence state

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DO - 10.1016/j.apsusc.2022.153909

M3 - 文章

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SN - 0169-4332

VL - 599

JO - Applied Surface Science

JF - Applied Surface Science

M1 - 153909

ER -

Ultrafine Pd species anchored on porous CeO₂ nanobundles as a highly efficient catalyst for methane oxidation

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Keywords

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