Details

Autor(en) / Beteiligte

• Shen, Shaohua
• Guo, Penghui
• Wheeler, Damon A
• Jiang, Jiangang
• Lindley, Sarah A
• Kronawitter, Coleman X
• Zhang, Jin Z
• Guo, Liejin
• Mao, Samuel S

Titel

Physical and photoelectrochemical properties of Zr-doped hematite nanorod arrays

Ist Teil von

• Nanoscale, 2013-10, Vol.5 (20), p.9867-9874

Ort / Verlag

England

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This work examines the effect of Zr(4+) ions on the physical and photoelectrochemical (PEC) properties of hematite (α-Fe2O3) nanorod arrays grown in an aqueous solution containing zirconyl nitrate (ZrO(NO3)2) as a dopant precursor. The concentration of ZrO(NO3)2 in the precursor solution influenced both the film thickness and the Zr(4+) concentration in the resulting films. Zr doping was found to enhance the photocurrent for water splitting; the highest photocurrent at 1.0 V vs. Ag/AgCl (0.33 mA cm(-2)) for the Zr-doped α-Fe2O3 film was approximately 7.2 times higher than that for the undoped film (0.045 mA cm(-2)). Additionally, the incident photon to current efficiency (IPCE) at 360 nm and 1.23 V vs. the reversible hydrogen electrode (RHE) increased from 3.8% to 13.6%. Ultrafast transient absorption spectroscopy suggests that Zr doping may influence PEC performance by reducing the rate of electron-hole recombination.