TY - JOUR
T1 - Enhancement of solid base activity for porous boron nitride catalysts by controlling active structure using post treatment
AU - Takagaki, Atsushi
AU - Nakamura, Shohei
AU - Watanabe, Motonori
AU - Kim, Yoonyoung
AU - Song, Jun Tae
AU - Jimura, Keiko
AU - Yamada, Kanta
AU - Yoshida, Masaaki
AU - Hayashi, Shigenobu
AU - Ishihara, Tatsumi
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Scientific Research (B) (No. 18H01785 ) from JSPS, Japan. A part of this work was performed at the KEK-IMSS-PF ( 2017G529 and 2019G674 ). It was supported by the AIST Nanocharacterization Facility (ANCF) platform as a program of the “Nanotechnology Platform” of the MEXT, Japan, Grant Number JPMXP09A18AT0056 .
Funding Information:
This work was supported by a Grant-in-Aid for Scientific Research (B) (No. 18H01785) from JSPS, Japan. A part of this work was performed at the KEK-IMSS-PF (2017G529 and 2019G674). It was supported by the AIST Nanocharacterization Facility (ANCF) platform as a program of the ?Nanotechnology Platform? of the MEXT, Japan, Grant Number JPMXP09A18AT0056.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/11/25
Y1 - 2020/11/25
N2 - Porous boron nitride (BN) was synthesized using a pyrolysis method in conjunction with varying NH3 flow rates, followed by washing as a post-treatment. The performance of this material as a solid base catalyst was assessed. It was found that the post-treatment rather than the synthesis conditions significantly improved the activity of the BN during the nitroaldol reaction. The BN catalyst obtained after washing gave a ten times higher product yield. Both an increase in the surface areas of the material and the emergence of micropores after washing were observed. 11B solid-state nuclear magnetic resonance spectroscopy demonstrated that boron oxide species were present in the BN after synthesis but were removed by the washing process. B K-edge X-ray absorption fine structure analyses indicated the formation of oxygen-substituted trigonal boron sites on the BN surface. Fourier transform infrared spectroscopy showed that amino groups on the samples functioned as moderately strong basic sites.
AB - Porous boron nitride (BN) was synthesized using a pyrolysis method in conjunction with varying NH3 flow rates, followed by washing as a post-treatment. The performance of this material as a solid base catalyst was assessed. It was found that the post-treatment rather than the synthesis conditions significantly improved the activity of the BN during the nitroaldol reaction. The BN catalyst obtained after washing gave a ten times higher product yield. Both an increase in the surface areas of the material and the emergence of micropores after washing were observed. 11B solid-state nuclear magnetic resonance spectroscopy demonstrated that boron oxide species were present in the BN after synthesis but were removed by the washing process. B K-edge X-ray absorption fine structure analyses indicated the formation of oxygen-substituted trigonal boron sites on the BN surface. Fourier transform infrared spectroscopy showed that amino groups on the samples functioned as moderately strong basic sites.
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U2 - 10.1016/j.apcata.2020.117843
DO - 10.1016/j.apcata.2020.117843
M3 - Article
AN - SCOPUS:85091739187
SN - 0926-860X
VL - 608
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
M1 - 117843
ER -