Oxygen Vacancy of Pt/CeO2 Enabled Low-Temperature Hydrogen Generation from Methanol and Water

Aqueous-phase reforming of methanol (APRM) represents an alternative approach to achieve a sustainable hydrogen generation and safe storage. Nonetheless, the limitations imposed by the high operating temperatures of heterogeneous catalysts serve as a bottleneck for the widespread adoption of this system. Herein, we demonstrated that the Pt nanoparticles supported on porous nanorods of CeO2 with abundant oxygen vacancies (Pt/PN-CeO2) enabled the efficient H-2 generation through low-temperature (<60 degrees C) APRM reaction. The presence of oxygen vacancies on PN-CeO2 could enhance the electronic density of supported Pt nanoparticles through strong metal-support interaction, thereby promoting the activation of methanol. Meanwhile, the oxygen vacancies could further promote the H2O activation. Consequently, the interface between Pt and PN-CeO2 enabled efficient H-2 generation at 60 degrees C with a TOF values of 173.5 h(-1) and suppress CO generation. This finding provides a promising pathway towards the low-temperature APRM reaction.