Activity of Cu-Fe Mixed Oxide Catalysts in the Selective CO Oxidation (CO-PROX)

Author(s): Volodymyr L. Veselovskyi, Elena V. Ischenko, Snezhana V. Gayday, Alexander Byeda, Vasiliy V. Tkach, Vladyslav V. Lisnyak

Journal Name: Current Catalysis

Volume 2 , Issue 1 , 2013

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The Cu-Fe mixed oxide catalysts with different Cu:Fe mass ratios were prepared by a solution technique. The catalysts were characterized by Ar physisorption, PXRD, TPD-MS, SEM-EDX and were tested for the CO-PROX reaction. According to PXRD and SEM-EDX microanalysis data, the active Cu-Fe mixed oxide catalysts, where the Cu:Fe mass ratio ranges from 1:1 to 1:5.67, contain the delafossite CuFeO2 phase, which is formed at the pretreatment stage in the gas mixture used for the CO-PROX reaction. The Cu-Fe mixed oxide catalyst with the mass ratio of Cu:Fe = 1:3 showed 100% CO conversion at 408 K and the low H2 conversion (4 %) at this temperature, giving >80 % selectivity to CO oxidation. The blocking of the active sites at the catalyst surface by water, which is detected with TPDMS, could explain the high selectivity to CO oxidation.

Keywords: CO-PROX reaction, Cu-Fe mixed oxide catalyst, delafossite CuFeO2, PXRD; SEM-EDX, TPD-MS

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Article Details

Year: 2013
Page: [7 - 12]
Pages: 6
DOI: 10.2174/2211544711302010003

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