α-Fe2O3 nanoarrays photoanodes decorated with Ni-MOFs for enhancing photoelectrochemical water oxidation

doi:10.1016/j.ijhydene.2020.07.277

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	α-Fe2O3 nanoarrays photoanodes decorated with Ni-MOFs for enhancing photoelectrochemical water oxidation
	Liu, Xiangyan 1; Zhan, Faqi 4; Li, Dongwei 3; Xue, Mingyue 2
刊名	International Journal of Hydrogen Energy
	2020-10-30
卷号	45 期号:53 页码:28836-28846
关键词	Bode diagrams Electrochemical impedance spectroscopy Hematite Metal-Organic Frameworks Organometallics Oxidation Oxygen evolution reaction Photoelectrochemical cells Reaction kinetics Charge recombinations Onset potential Oxygen evolution reaction (oer) Photocurrent density Photoelectrocatalytic Photoelectrochemical water oxidation Photogenerated charge Sluggish kinetics
ISSN号	03603199
DOI	10.1016/j.ijhydene.2020.07.277
英文摘要	Owing to severe recombination of photogenerated charges, sluggish kinetics of oxygen evolution reaction (OER) and high overpotential, the efficiency of photoelectrocatalytic (PEC) water splitting is severely restricted currently. Herein, a metal-organic framework (Ni-MOF) as cocatalyst has been introduced onto Fe2O3 nanoarrays for PEC water oxidation. The new Ni-MOFs/Fe2O3 photoanode obviously improves the PEC water oxidation performance with respect to the Fe2O3. Specifically, a high photocurrent density is achieved on the Ni-MOF/Fe2O3 film, which corresponds to two-fold over the pristine Fe2O3 film at 1.23 V vs. RHE. Moreover, the photoanode also exhibits a significant cathodic shift of the onset potential (~240 mV) relative to the bare Fe2O3. The enhanced PEC performance is attributed to effective utilization the surface-reaching holes and reduction of the surface charge recombination, which are confirmed by electrochemical impedance spectroscopy and the derived Bode analysis. This study brings new insight into the development of MOF-based materials in the field of PEC water splitting. © 2020 Hydrogen Energy Publications LLC
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000579568300052
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115533]
专题	省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.Department of General Surgery, Xiangya Hospital, Central South University, Clinical Research Center for Breast Cancer Control and Prevention in Hunan Province, Changsha; 410008, China; 2.School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin; 541004, China; 3.Division of Scientific Research Management, Chongqing University of Education, Chongqing; 400065, China; 4.State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Liu, Xiangyan,Zhan, Faqi,Li, Dongwei,et al. α-Fe2O3 nanoarrays photoanodes decorated with Ni-MOFs for enhancing photoelectrochemical water oxidation[J]. International Journal of Hydrogen Energy,2020,45(53):28836-28846.
APA	Liu, Xiangyan,Zhan, Faqi,Li, Dongwei,&Xue, Mingyue.(2020).α-Fe2O3 nanoarrays photoanodes decorated with Ni-MOFs for enhancing photoelectrochemical water oxidation.International Journal of Hydrogen Energy,45(53),28836-28846.
MLA	Liu, Xiangyan,et al."α-Fe2O3 nanoarrays photoanodes decorated with Ni-MOFs for enhancing photoelectrochemical water oxidation".International Journal of Hydrogen Energy 45.53(2020):28836-28846.