Abstract
Rutile titanium dioxide (TiO2) exhibits excellent photoelectrochemical properties but limited photocatalytic performance due to its large band gap and fast electron-hole recombination. Here, we report a composite catalyst of NiTiO3 nanoparticle-coated TiO2 nanorod arrays (NiTiO3/TiO2 NRAs) via an electrostatic assembly strategy. The NiTiO3/TiO2 heterostructure endows an enlarged absorption range and enhanced electron-hole separation efficiency. When being used as an electrode in photoelectrochemical water splitting, it achieves the highest photocurrent density of 1.94 mA cm-2 at 1.0 V versus reversible hydrogen electrode, which is 3.74 times higher than the photocurrent density of pristine rutile TiO2 NRAs (0.51 mA cm-2). The heterostructure engineering strategy is demonstrated to enhance the photoelectrochemical performance, which can be extended to optimize various semiconductor photocatalysts.
| Original language | English |
|---|---|
| Pages (from-to) | 14440-14446 |
| Number of pages | 7 |
| Journal | ACS Applied Energy Materials |
| Volume | 4 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Dec 27 2021 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2021 American Chemical Society.
ASJC Scopus Subject Areas
- Chemical Engineering (miscellaneous)
- Energy Engineering and Power Technology
- Electrochemistry
- Materials Chemistry
- Electrical and Electronic Engineering
Keywords
- charge separation
- heterostructure
- photoelectrochemical
- TiO
- water splitting
