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장지현

Jang, Ji-Hyun
Structures & Sustainable Energy Lab.
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A selectively decorated Ti-FeOOH co-catalyst for a highly efficient porous hematite-based water splitting system

Author(s)
Yoon, Ki-YongAhn, Hyo-JinKwak, Myung-JunKim, Sun-IPark, JuhyungJang, Ji-Hyun
Issued Date
2016-12
DOI
10.1039/C6TA08273D
URI
https://scholarworks.unist.ac.kr/handle/201301/21078
Fulltext
http://pubs.rsc.org/en/Content/ArticleLanding/2016/TA/C6TA08273D#!divAbstract
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.4, no.48, pp.18730 - 18736
Abstract
We report an efficient Ti-doped FeOOH (Ti-FeOOH) co-catalyst applied on SiOx thin layer coated Ti-doped porous Fe2O3 (Ti-PH) to realize an excellent water splitting photoelectrochemical cell. The SiOx thin layer coated on Ti-doped porous hematite induces preferential deposition of the Ti-FeOOH co-catalyst on the inner pores of Ti-PH, which enhances oxygen evolution reaction performance without interrupting the absorption of light by hematite. The photocurrent density of Ti-FeOOH/Ti-PH is 4.06 mA cm2 at 1.23 V vs. RHE, 3.4 times higher than that of conventional worm-like hematite, with excellent long-term stability for 36 h. This represents the state-of-the-art performance among hematite-based systems with the exception of very few studies that used precious materials. Importantly, the proposed photoanode can be fabricated by a simple and cost-efficient solution-based method, i.e. with cheap precursors and without any specific equipment.
Publisher
ROYAL SOC CHEMISTRYROYAL SOC CHEMISTRY
ISSN
2050-7488
Keyword
OXYGEN EVOLUTION REACTIONPHOTOELECTROCHEMICAL CELLSHYDROGEN GENERATIONTHIN-FILMSIRON-OXIDEPHOTOANODESOXIDATIONPERFORMANCEALPHA-FE2O3GRAPHENE

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