1993
DOI: 10.1002/pssa.2211380141
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Mössbauer study of hydrogen reduction in Fe and FeNi on silica supported catalysts prepared by evaporation

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“…In general, supported iron nanoparticles are prepared by deposition of an iron salt on a hydrophilic support material, such as silica or alumina. Upon calcination iron oxide nanoparticles are formed which are usually stepwise reduced using an external H2(g) source [30]; the following reduction steps can be observed: Fe2O3  Fe3O4  FeO  Fe (0) . However, it is known that the presence of water vapor will strongly affect the rate of reduction and may even prevent the reduction of iron oxides thermodynamically [30][31][32][33].…”
Section: Thermodynamic Considerationsmentioning
confidence: 99%
“…In general, supported iron nanoparticles are prepared by deposition of an iron salt on a hydrophilic support material, such as silica or alumina. Upon calcination iron oxide nanoparticles are formed which are usually stepwise reduced using an external H2(g) source [30]; the following reduction steps can be observed: Fe2O3  Fe3O4  FeO  Fe (0) . However, it is known that the presence of water vapor will strongly affect the rate of reduction and may even prevent the reduction of iron oxides thermodynamically [30][31][32][33].…”
Section: Thermodynamic Considerationsmentioning
confidence: 99%