A selectively exposed crystal facet-engineered TiO2 thin film photoanode for the higher performance of the photoelectrochemical water splitting reaction

IMR OpenIR

	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
发表期刊	ENERGY & ENVIRONMENTAL SCIENCE
ISSN	1754-5692
卷号	8 期号:12 页码:3646-3653
摘要	In 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.
部门归属	[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
资助者	Minister of Science, ICT and Future Planning (MSIP) through the National Research Foundation of Korea [2009-0093885]; Brain Korea 21 Plus Project
收录类别	sci
语种	英语
WOS记录号	WOS:000365412300022
引用统计	被引频次：96[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/74602
专题	中国科学院金属研究所
通讯作者	yskang@sogang.ac.kr
推荐引用方式 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.