TY - JOUR
T1 - Independent control of metal cluster and ceramic particle characteristics during one-step synthesis of Pt/TiO2
AU - Schulz, H.
AU - Madler, L.
AU - Strobel, R.
AU - Jossen, R.
AU - Pratsinis, S.E.
AU - Johannessen, Tue
PY - 2005
Y1 - 2005
N2 - Rapid quenching during flame spray synthesis of Pt/TiO2 (0-10 Wt% Pt) is demonstrated as a versatile method for independent control of support (TiO2) and noble metal (Pt)cluster characteristics. Titania grain size, morphology, crystal phase structure, and crystal size were analyzed by nitrogen adsorption, electron microscopy and x-ray diffraction, respectively, while Pt-dispersion and size were determined by CO-pulse chemisorption. The influence of quench cooling on the flame temperature was analyzed by Fourier transform infrared spectroscopy. Increasing the quench flow rate reduced the Pt diameter asymptotically. Optimal quenching with respect to maximum Pt-dispersion (similar to 60%) resulted in average Pt diameters of 1.7 to 2.3 nm for Pt-contents of 1-10 wt%, respectively.
AB - Rapid quenching during flame spray synthesis of Pt/TiO2 (0-10 Wt% Pt) is demonstrated as a versatile method for independent control of support (TiO2) and noble metal (Pt)cluster characteristics. Titania grain size, morphology, crystal phase structure, and crystal size were analyzed by nitrogen adsorption, electron microscopy and x-ray diffraction, respectively, while Pt-dispersion and size were determined by CO-pulse chemisorption. The influence of quench cooling on the flame temperature was analyzed by Fourier transform infrared spectroscopy. Increasing the quench flow rate reduced the Pt diameter asymptotically. Optimal quenching with respect to maximum Pt-dispersion (similar to 60%) resulted in average Pt diameters of 1.7 to 2.3 nm for Pt-contents of 1-10 wt%, respectively.
U2 - 10.1557/JMR.2005.0319
DO - 10.1557/JMR.2005.0319
M3 - Journal article
SN - 0884-2914
VL - 20
SP - 2568
EP - 2577
JO - Journal of Materials Research
JF - Journal of Materials Research
IS - 9
ER -