Weak affinity for CO of platinum group metal nanoparticles supported on partially reduced iron oxides
Source abstract
Abstract
The metal–support interaction in the partially reduced Pt/α-Fe2O3, Ir/γ-Fe2O3, Rh/γ-Fe2O3, and Ru/γ-Fe2O3 catalysts was investigated by IR-CO probe and X-ray photoelectron spectroscopy (XPS). The vibration bands of CO adsorbed on these noble metal particles could not be observed after these catalysts were treated with H2 at 373 K. XPS and X-ray diffraction measurements revealed that the reduction of Pt/α-Fe2O3 in H2 produced surface oxygen vacancies in the α-Fe2O3 support’s surface, whereas did not change its bulk structure. These results revealed the universal significance to some extent of a rule that the interaction between the nanoparticles of platinum group metals and the surface oxygen vacancies of iron oxide extremely weakens the affinity for CO of the metal nanoparticles in these supported catalysts, which is helpful for understanding the catalytic properties over these catalysts.
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Research context
OpenAlex topics: Catalytic Processes in Materials Science · Electrocatalysts for Energy Conversion · Catalysis and Oxidation Reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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