A composite catalyst with a lamellar Fe3O4/Pt/Fe3O4 structure has been prepared from an Al67Pt7Fe26 (at.%) alloy by leaching with an aqueous 10 % NaOH solution. The lamellar Fe3O4/Pt/Fe3O4 phase exhibits significant catalytic performance as measured by activity and selectivity during the steam reforming of methanol (SRM : CH3OH + H2O → CO2 + 3H2) superior to the catalytic performance of Pt obtained from Al2Pt and a conventional impregnated Pt/Fe3O4 catalyst under the same reaction conditions. It is clear that the Pt and Fe3O4 were primarily responsible for the catalysis of the decomposition of methanol (DM : CH3OH → CO + 2H2) and the water gas shift reaction (WGSR : CO + H2O ⇄ CO2 + H2), respectively. These two reactions work together in a complementary manner to facilitate the overall SRM reaction due to efficient the heat transfer characteristics of the lamellar Fe3O4/Pt/Fe3O4 structure. In this study, we demonstrate that a lamellar structure is available to couple two separate reactions to obtain a new catalytic function.
- Complementary catalytic functions
- Eutectic alloy
- Lamellar FeO/Pt/FeO
- Steam reforming of methanol
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