10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
Abstract View
A Facile Aerosol-based Synthesis of Cu-Ce-O Hybrid Nanoparticles for Synergistic Catalysis of Methane Combustion
DE-HAO TSAI, National Tsing Hua University
Abstract Number: 299 Working Group: Materials Synthesis
Abstract The synergistic effect of Cu-Ce-O hybrid nanostructure has shown the promise for catalytic methane combustion. Here, we aim to develop an aerosol-based two-stage thermal treatment method to (1) synthesize the Cu-Ce-O hybrid nanoparticle (NP) with a tunable oxidation state directly in gas phase, and (2) provide a mechanistic understanding of surface reduction of the Cu-Ce-O hybrid NP for catalysis of methane combustion. After evaporation-induced self-assembly followed by a thermal decomposition (i.e., 1st stage) to form metal oxide NP at the 1st stage thermal treatment, a temperature-programmed, aerosol-based hydrogen reduction process was employed for direct tuning the oxidation state of the NP in the gas phase (the 2nd stage thermal treatment). Differential mobility analysis, x-ray diffractomery, x-ray photoelectron spectroscopy, and scanning electron microscopy were employed complementarily for characterization of particle size, morphology, crystallinity, elemental composition, and oxidation state of the NPs. The results show a successfully catalysis on methane combustion over various initial oxidation states of Cu through the hybridization with ceria . The results show a high activity with a low light-off temperature, a high light-off stability and operation stability toward catalytic methane combustion. The prototype method is especially useful to fabricate a variety of nanocatalysts with different oxidation states of active metals by design for the study of methane-based energy and environmental applications.