One-Pot Synthesis of Hexamethylenetetramine Coupled with H₂ Evolution from Methanol and Ammonia by a Pt/TiO₂ Nanophotocatalyst.

ABSTRACT: Utilization of solar energy for photocatalytic H₂ evolution coupled with value-added chemical synthesis is a promising avenue to address energy and environmental crises. Here, we report the hexamethylenetetramine (HMT) synthesis and H₂ evolution from methanol and ammonia in one pot using a nanophotocatalyst of the conventional semiconductor TiO₂ (P25) loaded with Pt (Pt/P25). The addition of ammonia inhibits byproduct ethylene glycol formation, promotes H₂ evolution, and obtains HMT with high selectivity (>99.0%). The Pt valence state is regulated by calcination and reduction treatment, indicating that Pt/P25 is a stable catalyst for the photocatalytic synthesis of HMT from methanol and ammonia. The optimized formation rates of H₂ and

SUBMITTER: Chen W 

PROVIDER: S-EPMC9202295 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature