CrOx/nano-Ce0.60Zr0.35Y0.05O2 catalysts that are highly selective for the oxidative dehydrogenation of isobutane to isobutene

Guozhi Wang; Hongxing Dai; Lei Zhang; Jiguang Deng; Caixin Liu; Hong He; Chak Tong Au

doi:10.1016/j.apcata.2010.01.005

CrO_x/nano-Ce_0.60Zr_0.35Y_0.05O₂ catalysts that are highly selective for the oxidative dehydrogenation of isobutane to isobutene

Guozhi Wang, Hongxing Dai^*, Lei Zhang, Jiguang Deng, Caixin Liu, Hong He, Chak Tong Au

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

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Abstract

Fluorite-type nanosized Ce_0.60Zr_0.35Y_0.05O₂ (nano-CZY) solid solution catalysts that are relatively uniform in particle size (4–5 nm) and y CrO_x/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 CrO_x/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/(g_cat h)). We conclude that the good reducibility of the highly dispersed CrO_x 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% CrO_x/nano-CZY catalyst.

Original language	English
Pages (from-to)	272-278
Number of pages	7
Journal	Applied Catalysis A: General
Volume	375
Issue number	2
Early online date	11 Jan 2010
DOIs	https://doi.org/10.1016/j.apcata.2010.01.005
Publication status	Published - Mar 2010

User-Defined Keywords

Ceria-zirconia-yttria solid solution
Isobutane oxidative dehydrogenation
Nanoparticle
Supported chromia catalyst

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10.1016/j.apcata.2010.01.005

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@article{c2c77ac393b34a33a2885dab58205d09,

title = "CrOx/nano-Ce0.60Zr0.35Y0.05O2 catalysts that are highly selective for the oxidative dehydrogenation of isobutane to isobutene",

abstract = "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.",

keywords = "Ceria-zirconia-yttria solid solution, Isobutane oxidative dehydrogenation, Nanoparticle, Supported chromia catalyst",

author = "Guozhi Wang and Hongxing Dai and Lei Zhang and Jiguang Deng and Caixin Liu and Hong He and Au, {Chak Tong}",

note = "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.",

year = "2010",

month = mar,

doi = "10.1016/j.apcata.2010.01.005",

language = "English",

volume = "375",

pages = "272--278",

journal = "Applied Catalysis A: General",

issn = "0926-860X",

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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

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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 -

CrO_x/nano-Ce_0.60Zr_0.35Y_0.05O₂ catalysts that are highly selective for the oxidative dehydrogenation of isobutane to isobutene

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