| Autor: |
Zeng, Sheng, Muneshwar, Triratna, Riddell, Saralyn, Manuel, Ajay Peter, Vahidzadeh, Ehsan, Kisslinger, Ryan, Kumar, Pawan, Alam, Kazi Mohammad Monirul, Kobryn, Alexander E., Gusarov, Sergey, Cadien, Kenneth C., Shankar, Karthik |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| DOI: |
10.3390/catal11111374 |
| Popis: |
The lack of active, stable, earth-abundant, and visible-light absorbing materials to replace plasmonic noble metals is a critical obstacle for researchers in developing highly efficient and cost-effective photocatalytic systems. Herein, a core–shell nanotube catalyst was fabricated consisting of atomic layer deposited HfN shell and anodic TiO₂ support layer with full-visible regime photoactivity for photoelectrochemical water splitting. The HfN active layer has two unique characteristics: (1) A large bandgap between optical and acoustic phonon modes and (2) No electronic bandgap, which allows a large population of long life-time hot carriers, which are used to enhance the photoelectrochemical performance. The photocurrent density (≈2.5 mA·cm⁻² at 1 V vs. Ag/AgCl) obtained in this study under AM 1.5G 1 Sun illumination is unprecedented, as it is superior to most existing plasmonic noble metal-decorated catalysts and surprisingly indicates a photocurrent response that extends to 730 nm. The result demonstrates the far-reaching application potential of replacing active HER/HOR noble metals such as Au, Ag, Pt, Pd, etc. with low-cost plasmonic ceramics. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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