TY - JOUR
T1 - High Thermal Stability of La2O3- and CeO2-Stabilized Tetragonal ZrO2
AU - Wang, Shichao
AU - Xie, Hong
AU - Lin, Yuyuan
AU - Poeppelmeier, Kenneth R.
AU - Li, Tao
AU - Winans, Randall E.
AU - Cui, Yanran
AU - Ribeiro, Fabio H.
AU - Canlas, Christian P.
AU - Elam, Jeffrey W.
AU - Zhang, Hongbo
AU - Marshall, Christopher L.
PY - 2016/3/7
Y1 - 2016/3/7
N2 - Catalyst support materials of tetragonal ZrO2, stabilized by either La2O3 (La2O3-ZrO2) or CeO2 (CeO2-ZrO2), were synthesized under hydrothermal conditions at 200°C with NH4OH or tetramethylammonium hydroxide as the mineralizer. From in situ synchrotron powder X-ray diffraction and small-angle X-ray scattering measurements, the calcined La2O3-ZrO2 and CeO2-ZrO2 supports were nonporous nanocrystallites that exhibited rectangular shapes with a thermal stability of up to 1000°C in air. These supports had an average size of 10 nm and a surface area of 59-97 m2/g. The catalysts Pt/La2O3-ZrO2 and Pt/CeO2-ZrO2 were prepared by using atomic layer deposition with varying Pt loadings from 6.3 to 12.4 wt %. Monodispersed Pt nanoparticles of 3 nm were obtained for these catalysts. The incorporation of La2O3 and CeO2 into the t-ZrO2 structure did not affect the nature of the active sites for the Pt/ZrO2 catalysts for the water-gas shift reaction.
AB - Catalyst support materials of tetragonal ZrO2, stabilized by either La2O3 (La2O3-ZrO2) or CeO2 (CeO2-ZrO2), were synthesized under hydrothermal conditions at 200°C with NH4OH or tetramethylammonium hydroxide as the mineralizer. From in situ synchrotron powder X-ray diffraction and small-angle X-ray scattering measurements, the calcined La2O3-ZrO2 and CeO2-ZrO2 supports were nonporous nanocrystallites that exhibited rectangular shapes with a thermal stability of up to 1000°C in air. These supports had an average size of 10 nm and a surface area of 59-97 m2/g. The catalysts Pt/La2O3-ZrO2 and Pt/CeO2-ZrO2 were prepared by using atomic layer deposition with varying Pt loadings from 6.3 to 12.4 wt %. Monodispersed Pt nanoparticles of 3 nm were obtained for these catalysts. The incorporation of La2O3 and CeO2 into the t-ZrO2 structure did not affect the nature of the active sites for the Pt/ZrO2 catalysts for the water-gas shift reaction.
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U2 - 10.1021/acs.inorgchem.5b02810
DO - 10.1021/acs.inorgchem.5b02810
M3 - Article
AN - SCOPUS:84960354851
VL - 55
SP - 2413
EP - 2420
JO - Inorganic Chemistry
JF - Inorganic Chemistry
SN - 0020-1669
IS - 5
ER -