Dual-doping in the bulk and the surface to ameliorate the hematite anode for photoelectrochemical water oxidation

doi:10.1016/j.jcis.2022.04.080

IR > 石油化工学院

	Dual-doping in the bulk and the surface to ameliorate the hematite anode for photoelectrochemical water oxidation
	Wang, Tong 1; Gao, Lili 1; Wang, Peng 1; Long, Xuefeng2 ; Chai, Huan 1; Li, Feng 3; Jin, Jun 1
	2022-10-15
发表期刊	Journal of Colloid and Interface Science
ISSN	0021-9797
卷号	624 页码:60-69
摘要	Aiming at the drawbacks of hematite like poor conductivity and tardy oxidation kinetics, herein, we utilized dual dopants in the bulk and surface to ameliorate the situation. Specifically, doping optimal amount of Zr4+ in the hematite (Zr:Fe2O3) enhances the conductivity of hematite due to the higher charge carrier density. Further, F:FeOOH could form p-n heterojunction in bulk where a potential barrier is built up that repels electrons but prompts holes transferring to F:FeOOH for water oxidation. What's more, the high electronegative of F- would withdraw electron from the Fe site in FeOOH, and the enhanced positive electricity of Fe3+ is beneficial for adsorption of OH– as well as enhance the conductivity of FeOOH to expedite holes transfer. As a result, the composite photoanode (F:FeOOH/Zr:Fe2O3) shows a 3.25-times enhanced photocurrent density comparing with α-Fe2O3. The special designation employs ultrathin F:FeOOH to act as both p-type semiconductor and efficient co-catalyst, avoiding redundant layer that would extend the migration distance of holes. On the top of that, the dual modification approach provides an extensive prospect for the further application of hematite. © 2022 Elsevier Inc.
关键词	Electrochemistry Heterojunctions Oxidation Semiconductor doping Charge carrier density Co catalysts Dual doping Haematite High charges Oxidation kinetics P-n heterojunctions Photoelectrochemical water oxidation Photoelectrochemical water splitting Potential barriers
DOI	10.1016/j.jcis.2022.04.080
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Chemistry
WOS类目	Chemistry, Physical
WOS记录号	WOS:000810414800006
出版者	Academic Press Inc.
EI入藏号	20222412208662
EI主题词	Hematite
EI分类号	482.2 Minerals ; 712.1 Semiconducting Materials ; 714.2 Semiconductor Devices and Integrated Circuits ; 801.4.1 Electrochemistry ; 802.2 Chemical Reactions
来源库	WOS
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/158509
专题	石油化工学院
通讯作者	Jin, Jun
作者单位	1.Lanzhou Univ, Coll Chem & Chem Engn, State Key Lab Appl Organ Chem SKLAOC, Key Lab Catalyt Engn Gansu Prov, Lanzhou 730000, Peoples R China; 2.Lanzhou Univ Technol, Coll Petrochem Technol, Key Lab Low Carbon Energy & Chem Engn Gansu Prov, Lanzhou 730050, Peoples R China; 3.Ningxia Univ, Coll Chem & Chem Engn, State Key Lab High efficiency Utilizat Coal & Gree, Yinchuan 750021, Peoples R China
推荐引用方式 GB/T 7714	Wang, Tong,Gao, Lili,Wang, Peng,et al. Dual-doping in the bulk and the surface to ameliorate the hematite anode for photoelectrochemical water oxidation[J]. Journal of Colloid and Interface Science,2022,624:60-69.
APA	Wang, Tong.,Gao, Lili.,Wang, Peng.,Long, Xuefeng.,Chai, Huan.,...&Jin, Jun.(2022).Dual-doping in the bulk and the surface to ameliorate the hematite anode for photoelectrochemical water oxidation.Journal of Colloid and Interface Science,624,60-69.
MLA	Wang, Tong,et al."Dual-doping in the bulk and the surface to ameliorate the hematite anode for photoelectrochemical water oxidation".Journal of Colloid and Interface Science 624(2022):60-69.