Ordered Mesoporous Co                         3                         O                         4                         −Al                         2                         O                         3                          Binary Metal Oxides for CO Hydrogenation to Hydrocarbons: Synergy Effects of Phosphorus Modifier for an Enhanced Catalytic Activity and Stability

Yong Min Park; Dong Hyun Lee; Yun Jo Lee; Hyun Seog Roh; Chan Hwa Chung; Jong Wook Bae

doi:10.1002/cctc.201802087

Ordered Mesoporous Co ₃ O ₄ −Al ₂ O ₃ Binary Metal Oxides for CO Hydrogenation to Hydrocarbons: Synergy Effects of Phosphorus Modifier for an Enhanced Catalytic Activity and Stability

Yong Min Park, Dong Hyun Lee, Yun Jo Lee, Hyun Seog Roh, Chan Hwa Chung, Jong Wook Bae

Division of Environmental Engineering

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

12 Citations (Scopus)

Abstract

The synergy effects of phosphorus modifier on highly ordered mesoporous binary metal oxides of Co ₃ O ₄ −Al ₂ O ₃ (m-CoAl), prepared by nanocasting method using a hard template of KIT-6, were observed by an enhanced catalytic and structural stability of the m-CoAl during CO hydrogenation to hydrocarbons. The enhanced structural stability of the ordered mesoporous structures on the phosphorous-modified m-CoAl at an optimal amount of phosphorous modifier below 0.3 wt%P (P(3)/m-CoAl) was attributed to the partial formation of thermally stable metal phosphates under a reductive Fischer-Tropsch synthesis (FTS) reaction condition. The positive effects of the phosphorous modifier were originated from the partially formed SiO ₂ -like AlPO ₄ phases on the outer surfaces of the m-CoAl, as well as from partially formed irreducible and thermally stable spinel-type cobalt aluminates (CoAl ₂ O ₄ ). The hydrophobic SiO ₂ -like tridymite AlPO ₄ surfaces on the ordered matrices of the P/m-CoAl also effectively prevented the heavy wax (or coke precursors) depositions. The structural instability of the P/m-CoAl was observed at a higher phosphorous content above 0.5wt%P by preferentially forming the largely segregated mixed metal oxides such as Co ₃ O ₄ −CoAl ₂ O ₄ −Co ₃ (PO ₄ ) ₂ through the phase transformations of the surface excess AlPO ₄ .

Original language	English
Pages (from-to)	1707-1721
Number of pages	15
Journal	ChemCatChem
Volume	11
Issue number	6
DOIs	https://doi.org/10.1002/cctc.201802087
Publication status	Published - 2019 Mar 20

Bibliographical note

Funding Information:
The authors would like to sincerely acknowledge the financial support from the National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2018 M3D3A1A01018009 and 2017R1D1A1B03028214).

Publisher Copyright:
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

All Science Journal Classification (ASJC) codes

Catalysis
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry

Access to Document

10.1002/cctc.201802087

Cite this

Park, Y. M., Lee, D. H., Lee, Y. J., Roh, H. S., Chung, C. H., & Wook Bae, J. (2019). Ordered Mesoporous Co ₃ O ₄ −Al ₂ O ₃ Binary Metal Oxides for CO Hydrogenation to Hydrocarbons: Synergy Effects of Phosphorus Modifier for an Enhanced Catalytic Activity and Stability. ChemCatChem, 11(6), 1707-1721. https://doi.org/10.1002/cctc.201802087

Park, Yong Min ; Lee, Dong Hyun ; Lee, Yun Jo et al. / Ordered Mesoporous Co ₃ O ₄ −Al ₂ O ₃ Binary Metal Oxides for CO Hydrogenation to Hydrocarbons : Synergy Effects of Phosphorus Modifier for an Enhanced Catalytic Activity and Stability. In: ChemCatChem. 2019 ; Vol. 11, No. 6. pp. 1707-1721.

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title = "Ordered Mesoporous Co 3 O 4 −Al 2 O 3 Binary Metal Oxides for CO Hydrogenation to Hydrocarbons: Synergy Effects of Phosphorus Modifier for an Enhanced Catalytic Activity and Stability",

abstract = " The synergy effects of phosphorus modifier on highly ordered mesoporous binary metal oxides of Co 3 O 4 −Al 2 O 3 (m-CoAl), prepared by nanocasting method using a hard template of KIT-6, were observed by an enhanced catalytic and structural stability of the m-CoAl during CO hydrogenation to hydrocarbons. The enhanced structural stability of the ordered mesoporous structures on the phosphorous-modified m-CoAl at an optimal amount of phosphorous modifier below 0.3 wt%P (P(3)/m-CoAl) was attributed to the partial formation of thermally stable metal phosphates under a reductive Fischer-Tropsch synthesis (FTS) reaction condition. The positive effects of the phosphorous modifier were originated from the partially formed SiO 2 -like AlPO 4 phases on the outer surfaces of the m-CoAl, as well as from partially formed irreducible and thermally stable spinel-type cobalt aluminates (CoAl 2 O 4 ). The hydrophobic SiO 2 -like tridymite AlPO 4 surfaces on the ordered matrices of the P/m-CoAl also effectively prevented the heavy wax (or coke precursors) depositions. The structural instability of the P/m-CoAl was observed at a higher phosphorous content above 0.5wt%P by preferentially forming the largely segregated mixed metal oxides such as Co 3 O 4 −CoAl 2 O 4 −Co 3 (PO 4 ) 2 through the phase transformations of the surface excess AlPO 4 .",

author = "Park, {Yong Min} and Lee, {Dong Hyun} and Lee, {Yun Jo} and Roh, {Hyun Seog} and Chung, {Chan Hwa} and {Wook Bae}, Jong",

note = "Funding Information: The authors would like to sincerely acknowledge the financial support from the National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2018 M3D3A1A01018009 and 2017R1D1A1B03028214). Publisher Copyright: {\textcopyright} 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",

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Park, YM, Lee, DH, Lee, YJ, Roh, HS, Chung, CH & Wook Bae, J 2019, 'Ordered Mesoporous Co ₃ O ₄ −Al ₂ O ₃ Binary Metal Oxides for CO Hydrogenation to Hydrocarbons: Synergy Effects of Phosphorus Modifier for an Enhanced Catalytic Activity and Stability', ChemCatChem, vol. 11, no. 6, pp. 1707-1721. https://doi.org/10.1002/cctc.201802087

Ordered Mesoporous Co ₃ O ₄ −Al ₂ O ₃ Binary Metal Oxides for CO Hydrogenation to Hydrocarbons: Synergy Effects of Phosphorus Modifier for an Enhanced Catalytic Activity and Stability. / Park, Yong Min; Lee, Dong Hyun; Lee, Yun Jo et al.
In: ChemCatChem, Vol. 11, No. 6, 20.03.2019, p. 1707-1721.

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

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AU - Park, Yong Min

AU - Lee, Dong Hyun

AU - Lee, Yun Jo

AU - Roh, Hyun Seog

AU - Chung, Chan Hwa

AU - Wook Bae, Jong

N1 - Funding Information: The authors would like to sincerely acknowledge the financial support from the National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2018 M3D3A1A01018009 and 2017R1D1A1B03028214). Publisher Copyright: © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

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N2 - The synergy effects of phosphorus modifier on highly ordered mesoporous binary metal oxides of Co 3 O 4 −Al 2 O 3 (m-CoAl), prepared by nanocasting method using a hard template of KIT-6, were observed by an enhanced catalytic and structural stability of the m-CoAl during CO hydrogenation to hydrocarbons. The enhanced structural stability of the ordered mesoporous structures on the phosphorous-modified m-CoAl at an optimal amount of phosphorous modifier below 0.3 wt%P (P(3)/m-CoAl) was attributed to the partial formation of thermally stable metal phosphates under a reductive Fischer-Tropsch synthesis (FTS) reaction condition. The positive effects of the phosphorous modifier were originated from the partially formed SiO 2 -like AlPO 4 phases on the outer surfaces of the m-CoAl, as well as from partially formed irreducible and thermally stable spinel-type cobalt aluminates (CoAl 2 O 4 ). The hydrophobic SiO 2 -like tridymite AlPO 4 surfaces on the ordered matrices of the P/m-CoAl also effectively prevented the heavy wax (or coke precursors) depositions. The structural instability of the P/m-CoAl was observed at a higher phosphorous content above 0.5wt%P by preferentially forming the largely segregated mixed metal oxides such as Co 3 O 4 −CoAl 2 O 4 −Co 3 (PO 4 ) 2 through the phase transformations of the surface excess AlPO 4 .

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Park YM, Lee DH, Lee YJ, Roh HS, Chung CH, Wook Bae J. Ordered Mesoporous Co ₃ O ₄ −Al ₂ O ₃ Binary Metal Oxides for CO Hydrogenation to Hydrocarbons: Synergy Effects of Phosphorus Modifier for an Enhanced Catalytic Activity and Stability. ChemCatChem. 2019 Mar 20;11(6):1707-1721. doi: 10.1002/cctc.201802087