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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium 2018 Symposium on Functional Nanomaterials: Discovery and Integration of Nanomaterials
Presentation Title Nickel Promoted CO Oxidation over Ceria Supported Cobalt-nickel Bimetallic Oxide Catalysts
Author(s) Zhongqi Liu, Ruigang Wang
On-Site Speaker (Planned) Zhongqi Liu
Abstract Scope Developing non-noble metal based catalysts for carbon monoxide (CO) oxidation at low temperature still remains attractive but challenging. In this study, ceria nanorods (CeO<SUB>2</SUB>-NR) supported cobalt-nickel bimetallic oxides, as well as monometallic cobalt oxide and nickel oxide catalysts, were prepared by a precipitation-deposition method and investigated for CO oxidation. The <I>T</I><SUB>50</SUB> temperature (50% CO conversion) of the catalysts follows the sequence of 10wt% Co<SUB>0.5</SUB>Ni<SUB>0.5</SUB>O<SUB>x</SUB>-CeO<SUB>2</SUB>-NR (97 C) < 10wt% CoO<SUB>x</SUB>-CeO<SUB>2</SUB>-NR (150 C) < 10wt% NiO<SUB>x</SUB>-CeO<SUB>2</SUB>-NR (175 C) under a space velocity of 120,000 mL h<SUP>-1</SUP> g<SUB>cat</SUB><SUP>-1</SUP> using reactive gas 1vol%CO/20vol%O<SUB>2</SUB>/79vol%He with a 100 mL/min flow rate. XRD and TEM data identified stable NiCo<SUB>2</SUB>O<SUB>4</SUB> clusters on CeO<SUB>2</SUB>-NR. The BET surface area of 10wt% Co<SUB>0.5</SUB>Ni<SUB>0.5</SUB>O<SUB>x</SUB>-CeO<SUB>2</SUB>-NR (146.14 m<SUP>2</SUP>/g) showed great enhancement compared to 10wt% CoO<SUB>x</SUB>-CeO<SUB>2</SUB> (98.63 m<SUP>2</SUP>/g) and 10wt% NiO<SUB>x</SUB>-CeO<SUB>2</SUB> (99.51 m<SUP>2</SUP>/g). The H<SUB>2</SUB>-TPR results also revealed a synergetic effect between cobalt and nickel by the lowered reduction temperature and the boosted hydrogen consumption.
Proceedings Inclusion? Planned: Supplemental Proceedings volume


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