Integration of cobalt-phosphate catalyst and titanium dioxide interlayer in the hematite photoanodes to improve photoelectrochemical water splitting for hydrogen production

Integration of a Cu2O/ZnO heterojunction and Ag@SiO2 into a photoanode for enhanced solar water oxidation

“…16 Z-type heterojunctions can provide a stable internal electric eld between semiconductors and accelerate the migration of photogenerated carrier, which are preferred over general heterojunctions. [17][18][19] For instance, Li et al prepared a semiconductor with a ZnO/ZnS heterojunction by ion exchange suldation treatment, and found the photocurrent density was 1.35 times that of the bare ZnO photoanode at 1.23 V RHE . 20 Maity et al synthesized n-ZnO/p-ZnCo 2 O 4 photoanodes with heterojunctions, in which the introduction of ZnCo 2 O 4 decreased surface defects, inhibited the recombination of photogenerated carrier, and increased the photocurrent density of ZnO photoanodes.…”

Investigation of in situ sulfide/nitride/phosphide treatments of hematite photoanodes for improved solar water oxidation

“…Surface modification of α-Fe 2 O 3 photoanodes, such as the introduction of passivation/catalyst layers 9–11 and the construction of heterogeneous/homogeneous junctions, 12–14 can effectively reduce the external bias voltage and on-set potential of light-driven water splitting and extend the lifetime of photogenerated carriers, thereby improving their PEC-WS performance. 15–17 How to achieve surface engineering, with controllable heterogeneous junctions and effective action scope and without introducing additional defects, has become the research focus and a difficult challenge.…”