TY - JOUR
T1 - A comparative study of bulk and 3DOM-structured Co3O 4, Eu0.6Sr0.4FeO3, and Co 3O4/Eu0.6Sr0.4FeO3
T2 - Preparation, characterization, and catalytic activities for toluene combustion
AU - Ji, Kemeng
AU - Dai, Hongxing
AU - Deng, Jiguang
AU - Li, Xinwei
AU - Wang, Yuan
AU - Gao, Baozu
AU - Bai, Guangmei
AU - Au, Chak Tong
N1 - Funding Information:
The work was supported by the NSF of China ( 20973017 and 21077007 ), the NSF of Beijing Municipality ( 2102008 ), the Discipline and Postgraduate Education ( 005000541212014 ), the Creative Research Foundation of Beijing University of Technology ( 00500054R4003 and 005000543111501 ), the National High-Tech Research and Development (863) Key Program of Ministry of Science and Technology of China ( 2009AA063201 ), and the Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality ( PHR201007105 and PHR201107104 ). CTAU thanks the Hong Kong Baptist University for financial support ( FRG2/09-10/023 ). We also thank Mrs. Jianping He (State Key Laboratory of Advanced Metals & Materials, University of Science and Technology Beijing) for doing the SEM analysis.
PY - 2012/12/7
Y1 - 2012/12/7
N2 - Three-dimensionally ordered macroporous (3DOM) and bulk Co 3O4, Eu0.6Sr0.4FeO3 (ESFO), and 3 wt% Co3O4/Eu0.6Sr 0.4FeO3 (3Co3O4/ESFO) were fabricated using the PMMA-templating (3DOM-Co3O4 and 3DOM-ESFO), citric acid-assisted hydrothermal (Co3O4-bulk and ESFO-bulk), and incipient wetness impregnation (3Co3O 4/3DOM-ESFO and 3Co3O4/ESFO-bulk) methods, respectively. Physicochemical properties of these materials were characterized by means of various techniques, and their catalytic activities were evaluated for toluene combustion. Compared to the nonporous Co3O4 and ESFO samples, the 3DOM-Co3O4, 3DOM-ESFO, and 3Co 3O4/3DOM-ESFO samples exhibited higher oxygen adspecies concentrations and better low-temperature reducibility. The 3Co 3O4/3DOM-ESFO sample showed the best catalytic activity for toluene combustion, giving the T50% and T90% of 251 and 269 °C at 20,000 mL/(g h), respectively. The apparent activation energies of these samples were in the range of 72-88 kJ/mol. We believe that the higher oxygen adspecies concentration, better low-temperature reducibility, and synergistic action between Co3O4 and 3DOM-structured ESFO were responsible for the excellent catalytic performance of 3Co 3O4/3DOM-ESFO.
AB - Three-dimensionally ordered macroporous (3DOM) and bulk Co 3O4, Eu0.6Sr0.4FeO3 (ESFO), and 3 wt% Co3O4/Eu0.6Sr 0.4FeO3 (3Co3O4/ESFO) were fabricated using the PMMA-templating (3DOM-Co3O4 and 3DOM-ESFO), citric acid-assisted hydrothermal (Co3O4-bulk and ESFO-bulk), and incipient wetness impregnation (3Co3O 4/3DOM-ESFO and 3Co3O4/ESFO-bulk) methods, respectively. Physicochemical properties of these materials were characterized by means of various techniques, and their catalytic activities were evaluated for toluene combustion. Compared to the nonporous Co3O4 and ESFO samples, the 3DOM-Co3O4, 3DOM-ESFO, and 3Co 3O4/3DOM-ESFO samples exhibited higher oxygen adspecies concentrations and better low-temperature reducibility. The 3Co 3O4/3DOM-ESFO sample showed the best catalytic activity for toluene combustion, giving the T50% and T90% of 251 and 269 °C at 20,000 mL/(g h), respectively. The apparent activation energies of these samples were in the range of 72-88 kJ/mol. We believe that the higher oxygen adspecies concentration, better low-temperature reducibility, and synergistic action between Co3O4 and 3DOM-structured ESFO were responsible for the excellent catalytic performance of 3Co 3O4/3DOM-ESFO.
KW - Supported cobalt oxide catalyst
KW - Synergistic action
KW - Three-dimensionally ordered macroporous perovskite-type oxide
KW - Toluene combustion
UR - http://www.scopus.com/inward/record.url?scp=84870403522&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2012.09.004
DO - 10.1016/j.apcata.2012.09.004
M3 - Journal article
AN - SCOPUS:84870403522
SN - 0926-860X
VL - 447-448
SP - 41
EP - 48
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
ER -