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The Preparation and Catalytic Performance of Nanoporous CuO/CeO<sub>2</sub> Composites
School of Science, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, China
School of Science, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, China
School of Science, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, China
School of Science, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, China
School of Science, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, China
- 1 School of Science, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, China
- 2 School of Science, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, China
- 3 School of Science, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, China
- 4 School of Science, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, China
- 5 School of Science, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, China
Journal of Materials Science and Chemical Engineering·Volume 03 (2015)·Pages 154–161·Published 19 June 2015·DOI10.4236/msce.2015.37021
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Abstract
Nanoporous CuO/CeO 2 ribbons are successfully prepared through dealloying melt-spun Al 80-x Cu 20 Ce x (x = 0.5, 1, 2, 3, at%) alloy in a 5 wt% NaOH aqueous solution, followed by calcining in air. The samples are characterized by XRD, SEM, EDS, HRTEM, Raman and gas chromatograph. For the dealloyed melt-spun Al 80-x Cu 20 Ce x (x = 0.5, 1, 2, 3, at%) alloy, the XRD results indicate that Cu and Cu 2 O are formed, while CuO and CeO 2 are formed coupled with calcinations. The SEM shows that the CuO/CeO 2 ribbons with a homogeneous pore/grain structure are thermally stable up to 600 ℃ because uniform CeO 2 particles are dispersedly loaded on the fine CuO grains of the porous structure, which is validated by TEM again. Meanwhile, the Raman spectra show that the concentration of oxygen vacancies reach a maximum value when the calcining temperature at 600 ℃ . In addition, the gas chromatograph results show that the dealloyed Al 78 Cu 20 Ce 2 ribbons with calcined at 600 ℃ have the best active catalysis for CO oxidation and the rates of CO conversation reaching at 50% and 100% are 150 ℃ and 320 ℃ , respectively, owing to the synergetic effects of the CuO and CeO 2 species.
KeywordsDealloyingNanoporousCuOCeO<sub>2</sub>CO Oxidation
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