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- W2024132388 abstract "We demonstrate the activity of Ti0.84Pt0.01Fe0.15O2−δ and Ti0.73Pd0.02Fe0.25O2−δ catalysts towards the CO oxidation and water gas shift (WGS) reaction. Both the catalysts were synthesized in the nano crystalline form by a low temperature sonochemical method and characterized by different techniques such as XRD, FT-Raman, TEM, FT-IR, XPS and BET surface analyzer. H2-TPR results corroborate the intimate contact between noble metal and Fe ions in the both catalysts that facilitates the reducibility of the support. In the absence of feed CO2 and H2, nearly 100% conversion of CO to CO2 with 100% H2 selectivity was observed at 300 °C and 260 °C respectively, for Ti0.84Pt0.01Fe0.15O2−δ and Ti0.73Pd0.02Fe0.25O2−δ catalyst. However, the catalytic performance of Ti0.73Pd0.02Fe0.25O2−δ deteriorates in the presence of feed CO2 and H2. The change in the support reducibility is the primary reason for the significant increase in the activity for CO oxidation and WGS reaction. The effect of Fe addition was more significant in Ti0.73Pd0.02Fe0.25O2−δ than Ti0.84Pt0.01Fe0.15O2−δ. Based on the spectroscopic evidences and surface phenomena, a hybrid reaction scheme utilizing both surface hydroxyl groups and the lattice oxygen was hypothesized over these catalysts for WGS reaction. The mechanisms based on the formate and redox pathway were used to fit the kinetic data. The analysis of experimental data shows the redox mechanism is the dominant pathway over these catalysts." @default.
- W2024132388 created "2016-06-24" @default.
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- W2024132388 date "2012-12-01" @default.
- W2024132388 modified "2023-09-25" @default.
- W2024132388 title "Low temperature CO oxidation and water gas shift reaction over Pt/Pd substituted in Fe/TiO2 catalysts" @default.
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- W2024132388 doi "https://doi.org/10.1016/j.ijhydene.2012.09.070" @default.
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