Projects per year
The photoelectrochemical (PEC) water-splitting efficiency of a hematite-based photoanode is still far from the theoretical value due to its poor surface reaction kinetics and high density of surface trapping states. To solve these drawbacks, a photoanode consisting of NiO nanoparticles anchored on a gradient phosphorus-doped α-Fe2 O3 nanorod (NR) array (NiO/P-α-Fe2 O3) was fabricated to achieve optimal light absorption and charge separation, as well as rapid surface reaction kinetics. Specifically, a photoanode with the NR array structure allowed a high mass-transport rate to be achieved, while phosphorus doping effectively decreased the number of surface trapping sites and improved the electrical conductivity of α-Fe2O3. Furthermore, the p–n junction that forms between NiO and P-α-Fe2O3 can further improve the PEC performance due to efficient hole extraction and the water oxidization catalytic activity of NiO. Consequently, the NiO/P-α-Fe2 O3 NR photoanode produced a high photocurrent density of 2.08 mAcm2 at 1.23 V versus a reversible hydrogen electrode and a 110 mV cathodic shift of the onset potential. This rational design of structure offers a new perspective in exploring high-performance PEC photoano-des.
- Water splitting
- 1 Finished
Wallace, G., Forsyth, M., Macfarlane, D., Officer, D., Cook, M. J., Dodds, S., Spinks, G., Alici, G., Moulton, S., in het Panhuis, M., Kapsa, R. M. I., Higgins, M., Mozer, A., Crook, J., Innis, P., Coote, M. L., Wang, X., Howlett, P. C., Pringle, J. M., Hancock, L., Paull, B., Sparrow, R., Zhang, J., Spiccia, L., Diamond, D., Guldi, D., Kim, S. J., Unwin, P. & Watanabe, M.
30/06/14 → 30/06/21