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

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	Dual-doping in the bulk and the surface to ameliorate the hematite anode for photoelectrochemical water oxidation
	Wang, Tong 3; Gao, Lili 3; Wang, Peng 3; Long, Xuefeng 1; Chai, Huan 3; Li, Feng 2; Jin, Jun 3
刊名	Journal of Colloid and Interface Science
	2022-10-15
卷号	624 页码:60-69
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
ISSN号	0021-9797
DOI	10.1016/j.jcis.2022.04.080
英文摘要	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.
WOS研究方向	Chemistry
语种	英语
出版者	Academic Press Inc.
WOS记录号	WOS:000810414800006
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158509]
专题	石油化工学院
作者单位	1.Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou; 730050, China; 2.State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan; 750021, China 3.State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou; 730000, 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.