TY - JOUR
T1 - Porous Co3O4 nanowires and nanorods
T2 - Highly active catalysts for the combustion of toluene
AU - Bai, Guangmei
AU - Dai, Hongxing
AU - Deng, Jiguang
AU - Liu, Yuxi
AU - Wang, Fang
AU - Zhao, Zhenxuan
AU - Qiu, Wenge
AU - Au, Chak Tong
N1 - Funding Information:
The work described above was supported by the NSF of Beijing Municipality (Grant No. 2102008 ), the NSF of China (Grant Nos. 20973017 and 21077007 ), the Discipline and Postgraduate Education (Grant No. 005000541212014 ), the Creative Research Foundation of Beijing University Technology (Grant Nos. 00500054R4003 and 005000543111501 ), and the Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality (Grant Nos. 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 and Materials, University of Science & Technology Beijing) for doing the SEM analysis.
PY - 2013/1/15
Y1 - 2013/1/15
N2 - Porous Co3O4 nanowires and nanorods (Co 3O4-HT, Co3O4-HT-PEG, Co 3O4-HT-CTAB, and Co3O4-ME-CTAB, respectively) have been fabricated via the hydrothermal or microemulsion route in the absence and presence of polyethylene glycol (PEG) or cetyltrimethylammonium bromide (CTAB), respectively. Physicochemical properties of the materials were characterized by means of numerous techniques, and their catalytic activities for toluene combustion were evaluated. It is shown that Co3O4-HT-PEG and Co3O4-HT-CTAB displayed a porous nanowire-like morphology, whereas Co3O 4-ME-CTAB exhibited a porous nanorod-like shape. The porous Co 3O4 samples (surface area = 47-52 m2/g) possessed much higher surface oxygen adspecies concentrations and much better low-temperature reducibility than the nonporous counterpart. The Co 3O4-HT-CTAB sample showed the highest catalytic performance (T50% = 195 and T90% = 215 °C at a space velocity of 20,000 mL/(g h)). It is concluded that the excellent catalytic performance of Co3O4-HT-CTAB was associated with its higher surface area and surface oxygen species concentration, and better low-temperature reducibility.
AB - Porous Co3O4 nanowires and nanorods (Co 3O4-HT, Co3O4-HT-PEG, Co 3O4-HT-CTAB, and Co3O4-ME-CTAB, respectively) have been fabricated via the hydrothermal or microemulsion route in the absence and presence of polyethylene glycol (PEG) or cetyltrimethylammonium bromide (CTAB), respectively. Physicochemical properties of the materials were characterized by means of numerous techniques, and their catalytic activities for toluene combustion were evaluated. It is shown that Co3O4-HT-PEG and Co3O4-HT-CTAB displayed a porous nanowire-like morphology, whereas Co3O 4-ME-CTAB exhibited a porous nanorod-like shape. The porous Co 3O4 samples (surface area = 47-52 m2/g) possessed much higher surface oxygen adspecies concentrations and much better low-temperature reducibility than the nonporous counterpart. The Co 3O4-HT-CTAB sample showed the highest catalytic performance (T50% = 195 and T90% = 215 °C at a space velocity of 20,000 mL/(g h)). It is concluded that the excellent catalytic performance of Co3O4-HT-CTAB was associated with its higher surface area and surface oxygen species concentration, and better low-temperature reducibility.
KW - Hydrothermal synthesis method
KW - Microemulsion synthesis method
KW - One-dimensional material
KW - Porous CoO
KW - Toluene combustion
UR - http://www.scopus.com/inward/record.url?scp=84872340503&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2012.09.054
DO - 10.1016/j.apcata.2012.09.054
M3 - Journal article
AN - SCOPUS:84872340503
SN - 0926-860X
VL - 450
SP - 42
EP - 49
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
ER -