We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
TiO 2 -HfN Radial Nano-Heterojunction: A Hot Carrier Photoanode for Sunlight-Driven Water-Splitting.
- Authors
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
- Abstract
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.
- Subjects
HOT carriers; TITANIUM dioxide; ACOUSTIC phonons; PRECIOUS metals; TRANSITION metal nitrides; PLASMONICS
- Publication
Catalysts (2073-4344), 2021, Vol 11, Issue 11, p1374
- ISSN
2073-4344
- Publication type
Article
- DOI
10.3390/catal11111374