1 research outputs found
Significance of Epitaxial Growth of PtO<sub>2</sub> on Rutile TiO<sub>2</sub> for Pt/TiO<sub>2</sub> Catalysts
TiO2-supported Pt species have been widely
applied in
numerous critical reactions involving photo-, thermo-, and electrochemical-catalysis
for decades. Manipulation of the state of the Pt species in Pt/TiO2 catalysts is crucial for fine-tuning their catalytic performance.
Here, we report an interesting discovery showing the epitaxial growth
of PtO2 atomic layers on rutile TiO2, potentially
allowing control of the states of active Pt species in Pt/TiO2 catalysts. The presence of PtO2 atomic layers
could modulate the geometric configuration and electronic state of
the Pt species under reduction conditions, resulting in a spread of
the particle shape and obtaining a Pt/PtO2/TiO2 structure with more positive valence of Pt species. As a result,
such a catalyst exhibits exceptional electrocatalytic activity and
stability toward hydrogen evolution reaction, while also promoting
the thermocatalytic CO oxidation, surpassing the performance of the
Pt/TiO2 catalyst with no epitaxial structure. This novel
epitaxial growth of the PtO2 structure on rutile TiO2 in Pt/TiO2 catalysts shows its potential in the
rational design of highly active and economical catalysts toward diverse
catalytic reactions