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A selectively exposed crystal facet-engineered TiO2 thin film photoanode for the higher performance of the photoelectrochemical water splitting reaction
Kim, Chang Woo; Yeob, So Jin; Cheng, Hui-Ming; Kang, Young Soo; yskang@sogang.ac.kr
2015
Source PublicationENERGY & ENVIRONMENTAL SCIENCE
ISSN1754-5692
Volume8Issue:12Pages:3646-3653
AbstractIn the present study, a selectively exposed (101)-crystal facet engineered TiO2 photoanode is investigated for the higher efficiency of the hydrogen evolution reaction. To date, even though the photoelectrochemical performance (PEC) dependent on exposed crystal facets has been calculated and demonstrated in semiconducting microcrystals, selectively exposed crystal facets of photocatalyst thin films have not been reported yet. Herein, we demonstrate a TiO2 thin film photoanode with 100%-exclusively exposed crystal facets and suggest a methodology to obtain metal oxide thin film photoanodes with selectively exposed crystal facets. A selectively exposed crystal facet-manipulated metal oxide thin film photoanode is fabricated over pre-synthesized microcrystals through a three-step strategy: (1) hydrothermal synthesis of microcrystals, (2) positioning of microcrystals via polymer-induced manual assembly, and (3) fabrication of selectively exposed crystal facets of a TiO2 thin film through a secondary growth hydrothermal reaction. Based on the synthesis of representative TiO2 microcrystals with dominantly exposed (101), (100) and (001) crystal facets, the selectively exposed crystal faceted TiO2 thin film photoanode is comparatively investigated for practical PEC performance. The photocurrent density of the selectively exposed (101) crystal faceted TiO2 thin film photoanode is determined as 0.13 mA cm(-2) and has an 18% conversion efficiency of incident photon-to-current at a 0.65 V Ag/AgCl potential under AM 1.5G illumination. Its photoelectrochemical hydrogen production reached 0.07 mmol cm(-2) for 12 h, which is higher than those of (100) and (001) faceted photoelectrodes.
description.department[kim, chang woo ; yeob, so jin ; kang, young soo] sogang univ, korea ctr artificial photosynth, seoul 121742, south korea ; [kim, chang woo ; yeob, so jin ; kang, young soo] sogang univ, dept chem, seoul 121742, south korea ; [cheng, hui-ming] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china
Funding OrganizationMinister of Science, ICT and Future Planning (MSIP) through the National Research Foundation of Korea [2009-0093885]; Brain Korea 21 Plus Project
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74602
Collection中国科学院金属研究所
Corresponding Authoryskang@sogang.ac.kr
Recommended Citation
GB/T 7714
Kim, Chang Woo,Yeob, So Jin,Cheng, Hui-Ming,et al. A selectively exposed crystal facet-engineered TiO2 thin film photoanode for the higher performance of the photoelectrochemical water splitting reaction[J]. ENERGY & ENVIRONMENTAL SCIENCE,2015,8(12):3646-3653.
APA Kim, Chang Woo,Yeob, So Jin,Cheng, Hui-Ming,Kang, Young Soo,&yskang@sogang.ac.kr.(2015).A selectively exposed crystal facet-engineered TiO2 thin film photoanode for the higher performance of the photoelectrochemical water splitting reaction.ENERGY & ENVIRONMENTAL SCIENCE,8(12),3646-3653.
MLA Kim, Chang Woo,et al."A selectively exposed crystal facet-engineered TiO2 thin film photoanode for the higher performance of the photoelectrochemical water splitting reaction".ENERGY & ENVIRONMENTAL SCIENCE 8.12(2015):3646-3653.
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