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Three-dimensionally ordered macroporous (3DOM) MnCo2O4-supported Co3O4 and AuPd (xAuPdz/yCo3O4/ 3DOM MnCo2O4; x = 0.56-1.98 wt%, z = 1.9-2.1, and y = 4.80-24.36 wt%) catalysts were prepared using polymethyl methacrylate (PMMA) microsphere-templating, incipient wetness impregnation, and polyvinyl alcohol (PVA)-protected reduction methods. Physicochemical properties of the materials were characterized by means of numerous techniques, and their catalytic activities were evaluated for methane combustion. It is found that the xAuPdz/yCo3O4/3DOM MnCo2O4 samples with a surface area of 26.5-53.1 m2/g possessed a highquality 3DOM architecture, in which the AuPd nanoparticles (NPs) with a size of 4.6-5.8 nm were highly dispersed on the surface of the macropore framework. Among all of the samples, 1.98AuPd2.1/18.20Co3O4/ 3DOM MnCo2O4 exhibited the highest catalytic activity: the T10%, T50%, and T90% (temperatures required for achieving methane conversions of 10, 50, and 90 %, respectively) were 262, 340, and 408 degrees C at a space velocity of 40,000 mL/(g h). Partial deactivation of the 1.98AuPd2.1/18.20Co3O4/3DOM MnCo2O4 sample due to introduction of water vapor or carbon dioxide was reversible. It is concluded that the good catalytic performance of 1.98AuPd2.1/18.20Co3O4/3DOM MnCo2O4 was associated with its high adsorbed oxygen species concentration, good low-temperature reducibility, and strong interaction between Co3O4 or AuPd2.1 NPs and 3DOM MnCo2O4.
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CATALYSIS TODAY
ISSN: 0920-5861
Year: 2021
Volume: 376
Page: 134-143
5 . 3 0 0
JCR@2022
ESI Discipline: CHEMISTRY;
ESI HC Threshold:96
JCR Journal Grade:1
Cited Count:
WoS CC Cited Count: 15
SCOPUS Cited Count: 16
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 4