Studies on some α-Fe2O3 photoelectrodes

Effect of Cr doping on the photoelectrochemical performance of hematite nanorod photoanodes

“…It was suggested that doping could increase the solar energy conversion efficiency of a-Fe 2 O 3 photoanodes by improving the electronic conductivity and charge transport properties. For example, the resistivity of a-Fe 2 O 3 was decreased by more than 3 orders of magnitude by 0.2% doping with Mg 2 + [32], which proved to be especially effective for the enhancement of PEC water splitting activity [33]. Ti-doped a-Fe 2 O 3 photoanodes have been produced using different methods by many groups [22][23][24], and Ti incorporation was reported to efficiently improve the charge transport properties and the overall PEC performance.…”

Nanostructuredα-Fe2O3 in PEC Generation of Hydrogen

“…These Cu-doped p-Fe 2 O 3 thin films gave an improved photoconversion efficiency of 1.3%, with a total conversion efficiency of 2.9%, which is more than ten times that reported for Mg doping [27,28,40]. The result was on the same lines as that reported by Mohanty and Ghose in 1992 [80].…”

Synthesis of TiO2 nanotubes and photoelectrochemical analysis of the TiO2/Prussian blue interface

“…1 shows SEM (1a) and TEM (1b) images obtained for TiO 2 nanotube arrays formed at voltages of 30 V (1a) and 60 V (1b). The potential was applied for 3 h at 20°C to a titanium foil immersed in 0.2% w/w NH 4 …”

“…If these charged particles are transferred toward solid layers deposited on the semiconductor material to produce a redox process, the conversion of the photons into chemical energy could be achieved in an allin-one device. TiO 2 is an attractive semiconductor material for photoelectrochemical and photocatalytic purposes due to its stability, abundance and environmental compatibility, along with its suitable bandgap and valence band edge position [1][2][3][4][5][6][7][8][9][10]. Metallic hexacyanometallates on TiO 2 electrodes with an adequate overlap between their formal potentials might accept electrons and/or holes, producing a reduction or oxidation process in the metal centers, storing the energy in an electrochemical form.…”