Operando XAS and NAP-XPS studies of preferential CO oxidation on Co3O4 and CeO2-Co3O4 catalysts

Liliana Lukashuk,Karin Föttinger,Elisabeth Kolar,Christoph Rameshan,Detre Teschner,Michael Hävecker,Axel Knop-Gericke,Nevzat Yigit,Hao Li,Eamon McDermott,Michael Stöger-Pollach,Günther Rupprechter

Journal of Catalysis（2016）

引用 138|浏览8

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摘要

•Co3O4 bulk and surface state was characterized by operando XANES and NAP-XPS.•Easy surface reduction in pure CO (∼100°C) is via reaction with lattice oxygen.•Fast reoxidation by O2 prevents overall reduction.•Co3O4 bulk and surface appear fully oxidized under PROX selective conditions.•CeO2 promotion increases reduction temperatures in CO and H2 and enhances PROX activity.

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关键词

Cobalt oxide,PROX,Hydrogen,Operando XAS,NAP-XPS,Ceria promoter,Oxidation state

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