Abstract
Ni(OH)2/Ti-Fe2O3 photoanode was fabricated by a two-step hydrothermal method. The product showed a photocurrent density of 0.39 mA/cm2 at 1.23 V vs RHE. It was found that the Ti doping had promoted the photovoltage of hematite by surface modification rather than increasing donor density. The loading of Ni (OH)2 had further improved the photoelectrochemical performance of Ti-Fe2O3 via reducing both overpotential of oxygen evolution reaction and the recombination rate of the charge carriers. Moreover, the Ni(OH)2 content could be optimized to avoid light blocking effect due to excessive Ni(OH)2 loading. This confirms that Ni(OH)2/Ti-Fe2O3 could be a promising material for photoelectrochemical water splitting. © 2014 Elsevier Ltd. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 383-390 |
| Journal | Electrochimica Acta |
| Volume | 155 |
| DOIs | |
| Publication status | Published - 10 Feb 2015 |
Bibliographical note
Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].Funding
The authors would like to thank Dr Sam Ng for his assistance in the XPS experiments. This work was partially supported by a Direct Grant 2013/14 (Project ID: 4053076) provided by the Faculty of Science, the Chinese University of Hong Kong.
Research Keywords
- Hematite
- Heterostructures
- Ni(OH)2
- Photoelectrochemical water splitting
- Ti doping
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