期刊
CHEMSUSCHEM
卷 12, 期 5, 页码 1084-1090出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201802501
关键词
catalysis; CO oxidation; composite nanotubes; Co3O4-CeO2; hollow mesoporous structure
资金
- National Key R&D Program of China [2017YFC0210901, 2017YFC0210906]
- National Natural Science Foundation of China [51573122, 21722607, 21776190]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [17KJA430014, 17KJA150009]
- Science and Technology Program for Social Development of Jiangsu [BE2015637]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
Catalytic performance is heavily dependent on how the structures of nanomaterials are designed. Co3O4-CeO2 composite nanotubes with open ends and mesoporous structures were fabricated through a facile and environmentally friendly reaction. The mesoporous Co3O4 nanotubes were synthesized by the calcination of cobalt-aspartic acid (Co-Asp) nanowires and coated with a CeO2 shell. The composite nanotubes were characterized by SEM, TEM, XRD, and X-ray photoelectron spectroscopy. The composite materials comprise a combination of Co3O4 nanotubes and CeO2 nanoparticles with a hollow and mesoporous bimetallic oxide structure. The large BET surface area led to a higher degree of accessible active sites compared with other Co3O4-CeO2 composite nanomaterials with other structures. The resulting Co3O4-CeO2-26.3 wt % composite nanotubes, with a CeO2 content of approximately 26.3 wt %, achieved 100 % CO conversion at 145 degrees C. Additionally, the synergistic effect between the two metal oxides comprising the Co3O4-CeO2 composite nanotubes was demonstrated by the enhanced catalytic activity compared with pure Co3O4 nanotubes and CeO2 nanoparticles.
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