TY - JOUR
T1 - Selective hydrogenation of citral over supported Pt catalysts
T2 - insight into support effects
AU - Wang, Xiaofeng
AU - Hu, Weiming
AU - Deng, Baolin
AU - Liang, Xinhua
N1 - Publisher Copyright:
© 2017, Springer Science+Business Media Dordrecht.
PY - 2017/4/1
Y1 - 2017/4/1
N2 - Highly dispersed platinum (Pt) nanoparticles (NPs) were deposited on various substrates by atomic layer deposition (ALD) in a fluidized bed reactor at 300 °C. The substrates included multi-walled carbon nanotubes (MWCNTs), silica gel (SiO2), commercial γ-Al2O3, and ALD-prepared porous Al2O3 particles (ALD-Al2O3). The results of TEM analysis showed that ~1.3 nm Pt NPs were highly dispersed on all different supports. All catalysts were used for the reaction of selective hydrogenation of citral to unsaturated alcohols (UA), geraniol, and nerol. Both the structure and acidity of supports affected the activity and selectivity of Pt catalysts. Pt/SiO2 showed the highest activity due to the strong acidity of SiO2 and the conversion of citral reached 82% after 12 h with a selectivity of 58% of UA. Pt/MWCNTs showed the highest selectivity of UA, which reached 65% with a conversion of 38% due to its unique structure and electronic effect. The cycling experiments indicated that Pt/MWCNTs and Pt/ALD-Al2O3 catalysts were more stable than Pt/SiO2, as a result of the different interactions between the Pt NPs and the supports.
AB - Highly dispersed platinum (Pt) nanoparticles (NPs) were deposited on various substrates by atomic layer deposition (ALD) in a fluidized bed reactor at 300 °C. The substrates included multi-walled carbon nanotubes (MWCNTs), silica gel (SiO2), commercial γ-Al2O3, and ALD-prepared porous Al2O3 particles (ALD-Al2O3). The results of TEM analysis showed that ~1.3 nm Pt NPs were highly dispersed on all different supports. All catalysts were used for the reaction of selective hydrogenation of citral to unsaturated alcohols (UA), geraniol, and nerol. Both the structure and acidity of supports affected the activity and selectivity of Pt catalysts. Pt/SiO2 showed the highest activity due to the strong acidity of SiO2 and the conversion of citral reached 82% after 12 h with a selectivity of 58% of UA. Pt/MWCNTs showed the highest selectivity of UA, which reached 65% with a conversion of 38% due to its unique structure and electronic effect. The cycling experiments indicated that Pt/MWCNTs and Pt/ALD-Al2O3 catalysts were more stable than Pt/SiO2, as a result of the different interactions between the Pt NPs and the supports.
KW - Atomic layer deposition (ALD)
KW - Citral hydrogenation
KW - Nanostructured catalysts
KW - Platinum (Pt)
KW - Stability
KW - Supports
KW - Unsaturated alcohols (UA)
UR - https://www.scopus.com/pages/publications/85018507749
U2 - 10.1007/s11051-017-3845-3
DO - 10.1007/s11051-017-3845-3
M3 - Article
AN - SCOPUS:85018507749
SN - 1388-0764
VL - 19
JO - Journal of Nanoparticle Research
JF - Journal of Nanoparticle Research
IS - 4
M1 - 153
ER -