Enhanced Photocatalytic CO2 Reduction and Water Splitting Over a Boron-Rich Alloy Boron Suboxide (B6O) via Cr or Co Doping
| Autor: | Jiali Liu, Qiang Yang, Jikai Liu, Dejian Yan, He’an Luo |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010405 organic chemistry
Doping chemistry.chemical_element General Chemistry 010402 general chemistry 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound Transition metal Chemical engineering chemistry Electrical resistivity and conductivity Photocatalysis Water splitting Boron suboxide Electronic band structure Boron |
| Zdroj: | Catalysis Letters. 150:2497-2509 |
| ISSN: | 1572-879X 1011-372X |
| Popis: | Boron-rich alloy boron suboxide (B6O) as a novel metal-free photocatalyst was recently explored for photocatalytic CO2 reduction and water splitting. However, to broaden the potential applications of B6O in the field, further improving its activity and understanding its fundamental chemical properties are essential. Herein, transition metal doping (Cr or Co) is designed to engineer the band structure of B6O via a solid state reaction. The valence band edge of Cr or Co doped B6O is proposed to be more positive than that of pristine B6O while the original conduction band of B6O is not much influenced by doping, contributing to the better light harvesting ability and lower charge recombination rate of doped B6O. The photocatalytic and photoelectrochemical (PEC) performances of doped B6O were therefore remarkably enhanced. The apparent quantum yields (AQY) of 20 wt% Cr or Co doped B6O are much higher than that of pristine B6O. In addition, the 20 wt% Cr doped B6O exhibits the best electrical conductivity and photocatalytic performance compared with the Co doped B6O and pristine B6O. The present work demonstrates a facile and effective strategy to engineer the band structure and reduce the charge migration resistance of B6O. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |