Temperature and reaction environment influence the nature of platinum species supported on ceria
Catalytic systems based on supported noble metals are extensively studied because of their
widespread application. Discussions remain about the nature of the active species, whether
they are atomically dispersed or nanoparticles, and their reactivity. In this work, combining in
situ/operando spectroscopy with theoretical modeling, we propose a phase diagram of
atomically dispersed platinum on ceria, demonstrating that it reversibly changes from PtIVO2
to PtIIO as a function of temperature and oxygen partial pressure. The phase diagram helps …
widespread application. Discussions remain about the nature of the active species, whether
they are atomically dispersed or nanoparticles, and their reactivity. In this work, combining in
situ/operando spectroscopy with theoretical modeling, we propose a phase diagram of
atomically dispersed platinum on ceria, demonstrating that it reversibly changes from PtIVO2
to PtIIO as a function of temperature and oxygen partial pressure. The phase diagram helps …
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