A Study of Support Effects for CH                         4                          and CO Oxidation over Pd Catalysts on ALD-Modified Al                         2                         O                         3

Xinyu Mao; Alexandre Foucher; Eric A. Stach; Raymond J. Gorte

doi:10.1007/s10562-019-02699-6

A Study of Support Effects for CH ₄ and CO Oxidation over Pd Catalysts on ALD-Modified Al ₂ O ₃

Xinyu Mao, Alexandre Foucher, Eric A. Stach, Raymond J. Gorte

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

28 Scopus citations

Abstract

Interactions between a metal and its oxide support can influence CO and CH ₄ oxidation, but promotion by the support can be difficult to study because oxides can have different surface structures and surface areas. To focus on the chemical aspects of support promotion for CO and CH ₄ oxidation, this study investigated the effect of support composition on Pd catalysts by preparing uniform films of NiO, Co ₃ O ₄ , Fe ₂ O ₃ , MnO ₂ , CeO ₂ , and ZrO ₂ on γ-Al ₂ O ₃ using Atomic Layer Deposition (ALD). The structure of the films was characterized by XRD and STEM, and catalysts with ~ 1-wt% Pd were examined for CO and CH ₄ oxidation. CeO ₂ /γ-Al ₂ O ₃ was unique among the supports in greatly stabilizing the Pd dispersion to 1173 K. Rates for CO oxidation were enhanced by the presence of CeO ₂ , Fe ₂ O ₃ , and MnO ₂ , while the other oxides had no promotional effect. For CH ₄ oxidation, only NiO and Co ₃ O ₄ were modest promoters, while the other reducible oxides even showed a negative effect on rates. Possible reasons for the differences between CH ₄ and CO oxidation activities are discussed. Graphical Abstract: [Figure not available: see fulltext.].

Original language	English
Pages (from-to)	905-915
Number of pages	11
Journal	Catalysis Letters
Volume	149
Issue number	4
DOIs	https://doi.org/10.1007/s10562-019-02699-6
State	Published - Apr 15 2019
Externally published	Yes

Funding

Acknowledgements This work was funded by the Department of Energy, Office of Basic Energy Sciences, Chemical Sciences, Geosciences and Biosciences Division, Grant No. DE-FG02-13ER16380. The STEM work was carried out in part at the Singh Center for Nanotechnology, part of the National Nanotechnology Coordinated Infrastructure Program, which is supported by the National Science Foundation Grant NNCI-1542153. This work was funded by the Department of Energy, Office of Basic Energy Sciences, Chemical Sciences, Geosciences and Biosciences Division, Grant No. DE-FG02-13ER16380. The STEM work was carried out in part at the Singh Center for Nanotechnology, part of the National Nanotechnology Coordinated Infrastructure Program, which is supported by the National Science Foundation Grant NNCI-1542153.

Funders	Funder number
Office of Basic Energy Sciences
National Science Foundation	NNCI-1542153
U.S. Department of Energy
Chemical Sciences, Geosciences, and Biosciences Division	DE-FG02-13ER16380

Keywords

Atomic Layer Deposition
CO oxidation
Methane oxidation
Palladium
Support effects

Access to Document

10.1007/s10562-019-02699-6

Cite this

Mao, X., Foucher, A., Stach, E. A., & Gorte, R. J. (2019). A Study of Support Effects for CH ₄ and CO Oxidation over Pd Catalysts on ALD-Modified Al ₂ O ₃ Catalysis Letters, 149(4), 905-915. https://doi.org/10.1007/s10562-019-02699-6

Mao, Xinyu ; Foucher, Alexandre ; Stach, Eric A. et al. / A Study of Support Effects for CH ₄ and CO Oxidation over Pd Catalysts on ALD-Modified Al ₂ O ₃ In: Catalysis Letters. 2019 ; Vol. 149, No. 4. pp. 905-915.

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abstract = " Interactions between a metal and its oxide support can influence CO and CH 4 oxidation, but promotion by the support can be difficult to study because oxides can have different surface structures and surface areas. To focus on the chemical aspects of support promotion for CO and CH 4 oxidation, this study investigated the effect of support composition on Pd catalysts by preparing uniform films of NiO, Co 3 O 4 , Fe 2 O 3 , MnO 2 , CeO 2 , and ZrO 2 on γ-Al 2 O 3 using Atomic Layer Deposition (ALD). The structure of the films was characterized by XRD and STEM, and catalysts with ~ 1-wt% Pd were examined for CO and CH 4 oxidation. CeO 2 /γ-Al 2 O 3 was unique among the supports in greatly stabilizing the Pd dispersion to 1173 K. Rates for CO oxidation were enhanced by the presence of CeO 2 , Fe 2 O 3 , and MnO 2 , while the other oxides had no promotional effect. For CH 4 oxidation, only NiO and Co 3 O 4 were modest promoters, while the other reducible oxides even showed a negative effect on rates. Possible reasons for the differences between CH 4 and CO oxidation activities are discussed. Graphical Abstract: [Figure not available: see fulltext.].",

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Mao, X, Foucher, A, Stach, EA & Gorte, RJ 2019, ' A Study of Support Effects for CH ₄ and CO Oxidation over Pd Catalysts on ALD-Modified Al ₂ O ₃ ', Catalysis Letters, vol. 149, no. 4, pp. 905-915. https://doi.org/10.1007/s10562-019-02699-6

A Study of Support Effects for CH ₄ and CO Oxidation over Pd Catalysts on ALD-Modified Al ₂ O ₃ . / Mao, Xinyu; Foucher, Alexandre; Stach, Eric A. et al.
In: Catalysis Letters, Vol. 149, No. 4, 15.04.2019, p. 905-915.

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

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Mao X, Foucher A, Stach EA, Gorte RJ. A Study of Support Effects for CH ₄ and CO Oxidation over Pd Catalysts on ALD-Modified Al ₂ O ₃ Catalysis Letters. 2019 Apr 15;149(4):905-915. doi: 10.1007/s10562-019-02699-6