Studies of nickel/samarium-doped ceria for catalytic partial oxidation of methane and effect of oxygen vacancy

Andrew C. Chien; Nicole J. Ye; Chao Wei Huang; I. Hsiang Tseng

doi:10.3390/catal11060731

Studies of nickel/samarium-doped ceria for catalytic partial oxidation of methane and effect of oxygen vacancy

Andrew C. Chien, Nicole J. Ye, Chao Wei Huang, I. Hsiang Tseng

Department of Engineering Science

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

11 Citations (Scopus)

Abstract

We investigated the performance of nickel/samarium-doped ceria (Ni/SDC) nanocatalysts on the catalytic partial oxidation of methane (CPOM). Studies of temperature-programmed surface reaction and reduction reveal that catalytic activity is determined by a synergistic effect produced by Ni metals and metal-support interaction. Catalytic activity was more dependent on the Ni content below 600^◦C, while there is not much difference for all catalysts at high temperatures. The catalyst exhibiting high activities toward syngas production (i.e., a CH₄ conversion >90% at 700^◦C) requires a medium Ni-SDC interaction with an Sm/Ce ratio of about 1/9 to 2/8. This is accounted for by optimum oxygen vacancies and adequate ion diffusivity in the SDCs which, as reported, also display the highest ion conductivity for fuel cell applications.

Original language	English
Article number	731
Journal	Catalysts
Volume	11
Issue number	6
DOIs	https://doi.org/10.3390/catal11060731
Publication status	Published - 2021 Jun

All Science Journal Classification (ASJC) codes

Catalysis
Physical and Theoretical Chemistry

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10.3390/catal11060731

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title = "Studies of nickel/samarium-doped ceria for catalytic partial oxidation of methane and effect of oxygen vacancy",

abstract = "We investigated the performance of nickel/samarium-doped ceria (Ni/SDC) nanocatalysts on the catalytic partial oxidation of methane (CPOM). Studies of temperature-programmed surface reaction and reduction reveal that catalytic activity is determined by a synergistic effect produced by Ni metals and metal-support interaction. Catalytic activity was more dependent on the Ni content below 600◦C, while there is not much difference for all catalysts at high temperatures. The catalyst exhibiting high activities toward syngas production (i.e., a CH4 conversion >90% at 700◦C) requires a medium Ni-SDC interaction with an Sm/Ce ratio of about 1/9 to 2/8. This is accounted for by optimum oxygen vacancies and adequate ion diffusivity in the SDCs which, as reported, also display the highest ion conductivity for fuel cell applications.",

author = "Chien, {Andrew C.} and Ye, {Nicole J.} and Huang, {Chao Wei} and Tseng, {I. Hsiang}",

note = "Funding Information: Acknowledgments: The authors would like to acknowledge the administrative support from Feng Chia University. Funding Information: Funding: This research was funded by Ministry of Science and Technology in Taiwan under contract MOST 109-2221-E-035-021-MY3 and MOST 109-2622-E-035-019. Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2021",

month = jun,

doi = "10.3390/catal11060731",

language = "English",

volume = "11",

journal = "Catalysts",

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AU - Chien, Andrew C.

AU - Ye, Nicole J.

AU - Huang, Chao Wei

AU - Tseng, I. Hsiang

N1 - Funding Information: Acknowledgments: The authors would like to acknowledge the administrative support from Feng Chia University. Funding Information: Funding: This research was funded by Ministry of Science and Technology in Taiwan under contract MOST 109-2221-E-035-021-MY3 and MOST 109-2622-E-035-019. Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021/6

Y1 - 2021/6

N2 - We investigated the performance of nickel/samarium-doped ceria (Ni/SDC) nanocatalysts on the catalytic partial oxidation of methane (CPOM). Studies of temperature-programmed surface reaction and reduction reveal that catalytic activity is determined by a synergistic effect produced by Ni metals and metal-support interaction. Catalytic activity was more dependent on the Ni content below 600◦C, while there is not much difference for all catalysts at high temperatures. The catalyst exhibiting high activities toward syngas production (i.e., a CH4 conversion >90% at 700◦C) requires a medium Ni-SDC interaction with an Sm/Ce ratio of about 1/9 to 2/8. This is accounted for by optimum oxygen vacancies and adequate ion diffusivity in the SDCs which, as reported, also display the highest ion conductivity for fuel cell applications.

AB - We investigated the performance of nickel/samarium-doped ceria (Ni/SDC) nanocatalysts on the catalytic partial oxidation of methane (CPOM). Studies of temperature-programmed surface reaction and reduction reveal that catalytic activity is determined by a synergistic effect produced by Ni metals and metal-support interaction. Catalytic activity was more dependent on the Ni content below 600◦C, while there is not much difference for all catalysts at high temperatures. The catalyst exhibiting high activities toward syngas production (i.e., a CH4 conversion >90% at 700◦C) requires a medium Ni-SDC interaction with an Sm/Ce ratio of about 1/9 to 2/8. This is accounted for by optimum oxygen vacancies and adequate ion diffusivity in the SDCs which, as reported, also display the highest ion conductivity for fuel cell applications.

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Studies of nickel/samarium-doped ceria for catalytic partial oxidation of methane and effect of oxygen vacancy

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