Details

Autor(en) / Beteiligte

• Dagar, Preeti
• Kumar, Sandeep
• Ganguli, Ashok Kumar

Titel

Effect of Mn 2+ incorporation on the photoelectrochemical properties of BiVO 4

Ist Teil von

• New journal of chemistry, 2022-02, Vol.46 (6), p.2875-2886

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• BiVO 4 is a promising photoanode material for photoelectrochemical water splitting applications due to its narrow band gap, i.e. , ∼2.4 eV, suitable band-edge positions, non-toxicity, and high stability. Here, we report the synthesis of Mn 2+ -doped BiVO 4 with varying concentrations of Mn 2+ (0.2–1.0%) to improve the charge-transport properties of the catalyst. The addition of Mn enables forbidden d–d transitions, which are utilized to slow down the charge-carrier recombination and increase the efficiency. The highest efficiency was achieved in the case of the 1.0% Mn 2+ –BiVO 4 photoanode, which exhibits a photocurrent density of 1.163 mA cm −2 at 1.23 V and 1.56 mA cm −2 at 1.4 V vs. RHE. The enhanced photoelectrochemical performance of Mn 2+ –BiVO 4 implies a higher charge-carrier separation and an improved electrical conductivity. This suggests that Mn 2+ -doped BiVO 4 may be used as a promising photoanode in future energy-conversion devices.