Co3O4-Decorated Hematite Nanorods As an Effective Photoanode for Solar Water Oxidation

Title
Co3O4-Decorated Hematite Nanorods As an Effective Photoanode for Solar Water Oxidation
Author
Tran Dinh Phong
Keywords
ALPHA-FE2O3 ELECTRODES; DOPED HEMATITE; THIN-FILMS; COMPOSITE; COBALT; ARRAYS; OXYGEN; CATALYSTS
Issue Date
2012-06
Publisher
Amer Chemical SOC
Citation
Journal of Physical Chemistry C, 2012, 116(26), P.13884-13889
Abstract
In this Article, we report a strategy to perform in situ incorporation of oxygen evolution catalyst, Co3O4, during hydrothermal growth of Fe2O3 nanorod arrays. It was found that the highest photocurrent increase and onset potential shift was observed with 5% Co2+. The photocurrent density increases from 0.72 for the pristine Fe2O3 nanorod to 1.20 mA/cm(2) at 1.23 V versus RHE (i.e., 67% improvement) with 5% Co2+ added. Concomitant with this improvement was a shift in the onset potential by similar to 40 mV and improvements in incident-photon-to-current efficiencies and oxygen evolution. Hematite photoanodes with in situ deposition of Co3O4 nanoparticles showed better performance than those prepared by ex situ procedures because of high surface roughness, larger Co3O4/hematite interfacial area, and smaller Co3O4 particle size.
URI
Co3O4-Decorated Hematite Nanorods As an Effective Photoanode for Solar Water Oxidationhttp://hdl.handle.net/20.500.11754/67199
ISSN
1932-7447
DOI
10.1021/jp304285r
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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