Premium
Selective Hydrogenation of Cinnamaldehyde to Cinnamal Alcohol over Platinum/Graphene Catalysts
Author(s) -
Ji Xiwang,
Niu Xiaoyu,
Li Bo,
Han Qing,
Yuan Fulong,
Zaera Francisco,
Zhu Yujun,
Fu Honggang
Publication year - 2014
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.201402573
Subject(s) - cinnamaldehyde , graphene , catalysis , x ray photoelectron spectroscopy , cinnamyl alcohol , selectivity , platinum , raman spectroscopy , materials science , platinum nanoparticles , nanoparticle , inorganic chemistry , nuclear chemistry , chemistry , chemical engineering , nanotechnology , organic chemistry , physics , optics , engineering
Catalysts made of Pt nanoparticles dispersed on graphene ( X wt %Pt/G, X =2.0, 3.5, and 5.0) were prepared and characterized by XRD, Raman spectroscopy, BET surface area measurements, TEM, and X‐ray photoelectron spectroscopy (XPS), and a 3.5 wt % Pt supported on Vulcan Carbon catalyst (3.5 wt %Pt/VC) was included as a reference. Although the mean Pt nanoparticle size is approximately 4.4 nm for all X wt %Pt/G and 3.5 wt %Pt/VC catalysts, cinnamal alcohol was produced with high selectivity only with the graphene‐supported catalysts: 92 % conversion and 88 % selectivity toward cinnamal alcohol were obtained with 3.5 wt %Pt/G. This catalyst also showed good stability in recycling tests. The good selectivity observed with the graphene‐based catalysts is attributed to the higher fraction of reduced surface Pt 0 atoms seen on the surface of the Pt nanoparticles (determined by XPS). This interpretation is consistent with DFT calculations. Additional π–π interactions between cinnamaldehyde and graphene may also play a role in the selective hydrogenation of cinnamaldehyde.