Nanosized FeOx overlayers on Pt-skin surfaces for low temperature CO oxidation

doi:10.1016/S1872-2067(12)60673-1

Abstract

Abstract:

Pt-Cu/carbon black catalysts were prepared by an impregnation-reduction method followed by acid leaching. The structure and composition of Pt-Cu nanoparticles treated under different conditions were investigated by inductively coupled plasma atomic emission spectrometry, X-ray diffraction, and X-ray photoelectron spectroscopy. PtCu₃ alloy formed upon annealing Pt-Cu/carbon black catalysts in H₂. Acid leaching produced Pt-Cu nanoparticles consisting of Pt-skeleton surface structure and PtCu₃ alloy core. The Pt-skeleton could be transformed to well-defined Pt-skin structure through further annealing the leached Pt-Cu nanoparticles in H₂. Decorating the Pt-skin surfaces with Fe oxide nanopatches resulted in enhanced reactivity in the preferential oxidation of CO in excess H₂. The tri-component Pt-Cu-Fe catalysts exhibited comparable activity to the bi-component Pt-Fe catalysts but used much less Pt.

Key words: CO oxidation, Pt-skin, Fe oxide, Interface catalysis

Hong Xu, Qiang Fu, Xinhe Bao. Nanosized FeO_x overlayers on Pt-skin surfaces for low temperature CO oxidation[J]. Chinese Journal of Catalysis, 2013, 34(11): 2029-2035.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(12)60673-1

https://www.cjcatal.com/EN/Y2013/V34/I11/2029

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Nanosized FeO_x overlayers on Pt-skin surfaces for low temperature CO oxidation

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