A novel strategy for surface treatment on hematite photoanode for efficient water oxidation

Title
A novel strategy for surface treatment on hematite photoanode for efficient water oxidation
Author
Tran Dinh Phong
Keywords
THIN-FILMS; DOPED HEMATITE; ALPHA-FE2O3 ELECTRODES; HYDROGEN-PRODUCTION; OXIDE; PERFORMANCE; ENHANCEMENT; NANORODS; CELLS; ZN
Issue Date
2012-09
Publisher
Royal SOC Chemistry
Citation
Chemical Science, 2013, 4(1), P.164-169
Abstract
In this paper, we report a novel strategy for surface treatment of hematite nanorods for efficient photo-driven water oxidation. This is the first report describing the growth of Sn treated hematite from alpha-FeOOH nanorod arrays in one step without substantially altering morphologies. With this treatment the photocurrent density increased from 1.24 for pristine hematite nanorods to 2.25 mA cm(-2) at 1.23 V vs. RHE (i.e. 81% improvement). The increase in photocurrent density was also accompanied by improved incident-photon-to-current efficiencies and oxygen evolution. The photocurrent improvement is mainly attributed to a reduced electron-hole recombination at the hematite-electrolyte interface through the formation of FexSn1-xO4 layer at the hematite nanorod surface as shown by XPS, HRTEM, EDAX line scan analyses and PEC measurements.
URI
http://apps.webofknowledge.com/InboundService.do?mode=FullRecord&customersID=EBSCO&IsProductCode=Yes&product=WOS&Init=Yes&Func=Frame&DestFail=http%3A%2F%2Fwww.webofknowledge.com&action=retrieve&SrcApp=EDS&SrcAuth=EBSCO&SID=F52NBcm77zkEVmzxqOY&UT=WOS%3A000311971500015http://hdl.handle.net/20.500.11754/41245
ISSN
2041-6520
DOI
10.1039/c2sc20881d
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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