Work

Paving “Pt···Ti” Hot Electron Transportation Bridge for Outstanding Photothermal Catalytic Reduction of CO 2

Year: 2024

Type: article

Abstract: Coupling photocatalysis with thermocatalysis is considered the best way for CO 2 reduction to produce useful hydrocarbons. Particularly, photocatalytic CO 2 reduction activity could be improved via the photothermal effect induced by local heat and subsequently, enhance visible light harvesting from noble metal nanoparticles. However, the sluggish hot electron transfer between noble metal and semiconducting materials remains an Achilles heel to achieve an applicable CO 2 reduction. Herein, a highly efficient “Pt · · · Ti” hot electron transportation bridge between Pt nanoparticles and hierarchically porous TiO 2 (HP-TiO 2) was paved. Such photothermocatalyst lowered the barrier of charge migration and exhibited significantly boosted CO 2 reduction with an outstanding hydrocarbon productivity of 29.68 μmol · h −1 · g −1, which was around 21 times higher than that of bulk-TiO 2; besides, an extraordinary selectivity to CH 4 of over 99% under simulated sunlight irradiation was achieved. In-situ characterizations and first-principle calculations confirmed that the manufactured “Pt · · · Ti” hot electron transportation bridge exerted a significant role in promoting CO 2 molecule activation and conversion. The innovative concept of paving an efficient hot electron shift bridge, acting as a crucial springboard promises a practical application of advanced photothermocatalyst for efficient industrial CO 2 reduction and high-valued chemical production.

Source: CCS Chemistry

DOI: 10.31635/ccschem.024.202404469