| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Respinis, M. De
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (1/1 displayed)
Places of action
| Organizations | Location | People |
|---|
article
Photoelectrochemical water splitting with porous α-Fe2O3 thin films prepared from Fe/Fe-oxide nanoparticles
Abstract
<p>We report on the photoelectrochemical (PEC) performance related to water oxidation of porous hematite (α-Fe<sub>2</sub>O<sub>3</sub>) thin films, which were prepared by spin coating of colloidal core/shell Fe/Fe-oxide nanoparticles (NPs) on fluorine-doped SnO<sub>2</sub> (FTO) substrates. Oxidation of the obtained Fe/Fe-oxide films at 600 °C, 700 °C, and 800 °C in air yielded porous α-Fe<sub>2</sub>O<sub>3</sub> thin films. The advantage of using Fe/Fe-oxide NPs is that they form stable suspensions in organic solvents and are suitable for spin coating. The highest photocurrent density of 0.75 mA/cm<sup>2</sup> at 1.23 V (vs. a reversible hydrogen electrode, RHE) was achieved with an α-Fe<sub>2</sub>O<sub>3</sub> thin film calcined at 800 °C. Incident photon-to-current conversion efficiency (IPCE) data showed that the quantum efficiency of the thin films was about 15% at 350 nm at an applied bias of 1.4 V vs. RHE. To improve the oxygen evolution reaction, we electrodeposited a Ni(OH)<sub>2</sub>/NiOOH catalyst (given as NiOOH) onto the α-Fe<sub>2</sub>O<sub>3</sub> film and achieved the reduction of onset potential from 0.85 to 0.69 V vs. RHE. Electrochemical impedance spectroscopy and open-circuit photovoltage (OCP) measurements were used to estimate the flat-band potential of the thin films.</p>