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- W2000549142 abstract "Iridium modified Ni/Al2O3 catalysts were prepared using Ni–Al hydrotalcite as precursor and tested in the selective decomposition of hydrous hydrazine for H2 generation. Compared to Ni/Al2O3, NiIrx/Al2O3 catalysts exhibited an increase of the reaction rate up to 6-fold and the H2 selectivity from 93% to above 99%. The XRD and EXAFS analysis confirmed that Ir and Ni were present in the form of Ni–Ir alloy; and the H2 differential heat of adsorption is appreciably lowered with increasing the amount of Ir in Ni–Ir alloy. High-temperature reduction, e.g. 700 °C, induced the migration of Ir atoms into the Ni bulk and produced a Ni-skin surface. This structural modification is associated with a strongly decrease of activity and selectivity. EXAFS measurements were also performed on different noble metals (NM, Ir, Pt, and Au) modified Ni/Al2O3 catalysts in order to verify the extent of NM-Ni bimetallic bond formation, which was found to correlate with the catalytic performance." @default.
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- W2000549142 date "2014-04-01" @default.
- W2000549142 modified "2023-10-17" @default.
- W2000549142 title "Structural and catalytic properties of supported Ni–Ir alloy catalysts for H2 generation via hydrous hydrazine decomposition" @default.
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- W2000549142 doi "https://doi.org/10.1016/j.apcatb.2013.10.022" @default.
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