In:
ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2015-01, No. 30 ( 2015-04-29), p. 1753-1753
Abstract:
Hydrogen production by photoelectrochemical water splitting based on modified nanostructure hematite is investigated for transformation and store of solar energy. Herein, nanorod hematite arrays were prepared by adjusted-hydrothermal method with a diameter of 30 nm. Phosphate group and cobalt ions were deposited of the surface of hematite by chemical immersion process to improve its photoelectrochemical performance and speed up the oxygen revolution reaction in water splitting. The CoPi-modified α-Fe 2 O 3 nanorod arrays (NAs) showed a greatly enhanced electrochemical and photoelectrochemical property with a photocurrent density 270 μ A/cm 2 at 1.23V ( vs. RHE) for FeCoPi-4 compared with 20 μ A/cm 2 for untreated α-Fe 2 O 3 NAs. The effect of phosphate groups and cobalt ions on the α-Fe 2 O 3 NAs were both investigated. The Co(Ⅱ) ion is connected closely with the α-Fe 2 O 3 surface through phosphate groups by XPS detection. The phosphate enhances the transport of electron from the α-Fe 2 O 3 to Co ion. The high performance domanstrated in photoelectrochemical test indicates that CoPi-modified α-Fe 2 O 3 NAs is a potential photoelectrocatalyst for water splitting. Figure 1
Type of Medium:
Online Resource
ISSN:
2151-2043
DOI:
10.1149/MA2015-01/30/1753
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2015
detail.hit.zdb_id:
2438749-6
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