TY - JOUR
T1 - CrOx/nano-Ce0.60Zr0.35Y0.05O2 catalysts that are highly selective for the oxidative dehydrogenation of isobutane to isobutene
AU - Wang, Guozhi
AU - Dai, Hongxing
AU - Zhang, Lei
AU - Deng, Jiguang
AU - Liu, Caixin
AU - He, Hong
AU - Au, Chak Tong
N1 - Funding Information:
The work was supported by the NSF of China (Grant Nos. 20973017 and 20473006 ), the PHR200907105 of the Beijing Municipal Commission of Education, and the SRF for ROCS (State Education Ministry of China). CTA thanks the Hong Kong Baptist University for financial support.
PY - 2010/3
Y1 - 2010/3
N2 - Fluorite-type nanosized Ce0.60Zr0.35Y0.05O2 (nano-CZY) solid solution catalysts that are relatively uniform in
particle size (4–5 nm) and y CrOx/nano-CZY (y is the weight percentage of Cr2O3 ranging from 2 to 10 wt%) catalysts were prepared by the ethylene
glycol-assisted CTAB-templated co-precipitation and incipient wetness
impregnation methods, respectively. The materials were characterized by a
number of analytical techniques and their catalytic performance was evaluated
for the oxidative dehydrogenation of isobutane. The y CrOx/nano-CZY catalysts show excellent activities, with the y = 8 wt% one performing the best (ca. 93% isobutene
selectivity and ca. 10% isobutene yield at 540 °C and 30,000 mL/(gcat h)). We conclude that the good reducibility of the
highly dispersed CrOx domains and the promotion of O2 adsorption at oxygen vacancies of nano-CZY (for enhanced oxidation of the reduced catalyst) are
responsible for the excellent performance of the 8 wt% CrOx/nano-CZY catalyst.
AB - Fluorite-type nanosized Ce0.60Zr0.35Y0.05O2 (nano-CZY) solid solution catalysts that are relatively uniform in
particle size (4–5 nm) and y CrOx/nano-CZY (y is the weight percentage of Cr2O3 ranging from 2 to 10 wt%) catalysts were prepared by the ethylene
glycol-assisted CTAB-templated co-precipitation and incipient wetness
impregnation methods, respectively. The materials were characterized by a
number of analytical techniques and their catalytic performance was evaluated
for the oxidative dehydrogenation of isobutane. The y CrOx/nano-CZY catalysts show excellent activities, with the y = 8 wt% one performing the best (ca. 93% isobutene
selectivity and ca. 10% isobutene yield at 540 °C and 30,000 mL/(gcat h)). We conclude that the good reducibility of the
highly dispersed CrOx domains and the promotion of O2 adsorption at oxygen vacancies of nano-CZY (for enhanced oxidation of the reduced catalyst) are
responsible for the excellent performance of the 8 wt% CrOx/nano-CZY catalyst.
KW - Ceria-zirconia-yttria solid solution
KW - Isobutane oxidative dehydrogenation
KW - Nanoparticle
KW - Supported chromia catalyst
UR - http://www.scopus.com/inward/record.url?scp=76049087430&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2010.01.005
DO - 10.1016/j.apcata.2010.01.005
M3 - Journal article
AN - SCOPUS:76049087430
SN - 0926-860X
VL - 375
SP - 272
EP - 278
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
IS - 2
ER -