Room Temperature Surface Modification of Ultrathin FeOOH Cocatalysts on Fe2O3 Photoanodes for High Photoelectrochemical Water Splitting

An ultrathin FeOOH cocatalyst is deposited on α-Fe2O3 photoanodes in a simple room temperature immersion process for efficient photoelectrochemical (PEC) water splitting. The prepared FeOOH/Fe2O3 photoanode has a photocurrent density of up to 2.4 mA/cm2 at 1.23 V versus reversible hydrogen electrode...

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Bibliographic Details
Published in:Journal of nanomaterials 2020, Vol.2020 (2020), p.1-7
Main Authors: Zou, Zhigang, Wang, Dunhui, Wang, Xiaoyong, Wang, Lu, Liao, Aizhen, Wei, Yiqing, Zhou, Yong
Format: Article
Language:English
Subjects:
Aqueous solutions
Density
Efficiency
Electrodes
Electrolytes
Light
Microscopy
Nanomaterials
Oxidation
Photoanodes
Photoelectric effect
Photoelectric emission
Room temperature
Solar energy
Submerging
Water splitting
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Summary:An ultrathin FeOOH cocatalyst is deposited on α-Fe2O3 photoanodes in a simple room temperature immersion process for efficient photoelectrochemical (PEC) water splitting. The prepared FeOOH/Fe2O3 photoanode has a photocurrent density of up to 2.4 mA/cm2 at 1.23 V versus reversible hydrogen electrode (RHE), and the photocurrent density is increased by about 160% compared to the bare Fe2O3 of 1.55 mA/cm2. An obvious cathodic shift of the photocurrent onset potential from 0.661 to 0.582 V was also observed, and excellent stability was maintained with almost no deterioration for 5 h. The enhanced PEC performance is attributed to the decrease of the interfacial resistance between electrode and electrolyte and the increase of the injection efficiency of holes in Fe2O3.
ISSN:1687-4110
1687-4129
DOI:10.1155/2020/7148714