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Tandem Condensation‐Hydrogenation to Produce Alkylated Nitriles Using Bifunctional Catalysts: Platinum Nanoparticles Supported on MOF‐Derived Carbon
Author(s) -
Huang Ao,
Nie Renfeng,
Zhang Biying,
Pei Yuchen,
Chen Minda,
Behera Ranjan,
Yu Jiaqi,
Luan Xuechen,
Hunter Nicholas T.,
Ke Ming,
Huang Wenyu
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201901930
Subject(s) - knoevenagel condensation , bifunctional , nitrile , malononitrile , catalysis , chemistry , alkylation , aldehyde , pyrolysis , bifunctional catalyst , cascade reaction , tandem , organic chemistry , materials science , composite material
Tandem catalysis, which allows multiple steps of a reaction to take place without the need for separation and purification, is highly desired for the design of efficient and environmentally‐friendly chemical processes. Herein, the pyrolysis of UiO‐66‐NH 2 , an amino‐functionalized metal‐organic framework, produces nitrogen‐rich carbon‐ZrO 2 composite (CN‐ZrO 2 ). This composite is rich in basic sites and effectively catalyzes the Knoevenagel condensation reaction. After loading Pt nanoparticles onto this composite support, a tandem catalyst (Pt/CN‐ZrO 2 ) is produced to be capable of the one‐step Knoevenagel condensation‐hydrogenation reaction to produce an alpha‐alkylated nitrile. The tandem catalyst exhibits >99 % aldehyde conversion and >99 % selectivity toward alpha‐alkylated nitrile under 1 MPa H 2 at 80 °C. This catalyst could be reused for five times in the presence of malononitrile without significant deactivation and is versatile for one‐step condensation‐hydrogenation of various aldehydes. The good performance of Pt/CN‐ZrO 2 could be ascribed to the synergistic interaction between Pt and CN‐ZrO 2 composite supports that lead to the appropriate hydrogenation activity of supported Pt nanoparticles.