Hydrothermal growth of highly oriented single crystalline Ta2O5 nanorod arrays and their conversion to Ta3N5 for efficient solar driven water splitting†
Kiyoung
Lee 
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Abstract
We grow vertically aligned single crystalline Ta2O5 nanorod arrays that can be converted to Ta3N5 nanorod arrays by nitridation. Combined with cobalt phosphate (Co-Pi) as a co-catalyst, such Ta3N5 nanorod photoanodes can yield photocurrent densities of ∼3.6 mA cm−2 at 1.23 VRHE and ∼8.2 mA cm−2 at 1.59 VRHE under AM 1.5G (100 mW cm−2) irradiation.
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