The spin state change of Fe3+ ions induced the paramagnetic Fe0.5Ni0.5OOH shell on the ferromagnetic Cu0.5NFe3Ni0.5 core via superexchange interaction, facilitating charge transfer and oxygen species ad(de)sorption for boosted OER performance.
Oxygen evolution reaction (OER) is a vital proton donor for various clean energy technologies. Here, we synthesized the IrOx decorated ultrathin NiFe-LDH nanosheets (thickness 1-2 nm, IrOx/U-NiFe-LDH) by one-step co-precipitation...
For
heterojunction semiconductor photoelectrodes, efficient charge
separation is localized in the junction-induced electric field region
and charge transfer follows a band-to-band charge-transfer pathway.
Here, we found that polaron states at the heterojunction interface
have a function of storing and transferring electrons. As a successful
demonstration, we verified that the polaron states (Ti3+OH) on TiO2 are not passivated when used to create a CdS/TiO2 heterojunction and function as an efficient pathway for massively
capturing, storing, and transferring the electrons from conduction
bands of both TiO2 and CdS, thus effectively enhancing
the charge separation efficiency of the heterojunction photoanode.
The electron throughput of polaron states remains a positive correlation
with polaron state density. Interfacial electron transfer through
the TiO2 surface polaron states has great potential application
in the development of high-performance heterojunction devices based
on TiO2.
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