Bifunctional citrate-Ni0.9Co0.1(OH)(x) layer coated fluorine-doped hematite for simultaneous hole extraction and injection towards efficient photoelectrochemical water oxidation

doi:10.1039/d1nr03257g

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Bifunctional citrate-Ni0.9Co0.1(OH)(x) layer coated fluorine-doped hematite for simultaneous hole extraction and injection towards efficient photoelectrochemical water oxidation
	Wang, Peng 1; Li, Feng 2; Long, Xuefeng 3; Wang, Tong 1; Chai, Huan 1; Yang, Honglei 1; Li, Shuwen 1; Ma, Jiantai 1; Jin, Jun 1
刊名	NANOSCALE
	2021-09-07
卷号	13 期号:33 页码:14197-14206
ISSN号	2040-3364
DOI	10.1039/d1nr03257g
英文摘要	Surface modification by loading a water oxidation co-catalyst (WOC) is generally considered an efficient means to optimize the sluggish surface oxygen evolution reaction (OER) of a hematite photoanode for photoelectrochemical (PEC) water oxidation. However, the surface WOC usually exerts little impact on the bulk charge separation of hematite. Herein, an ultrathin citrate-Ni0.9Co0.1(OH)(x) [Cit-Ni0.9Co0.1(OH)(x)] is conformally coated on the fluorine-doped hematite (F-Fe2O3) photoanode for PEC water oxidation to simultaneously promote the internal hole extraction and surface hole injection of the target photoanode. Besides, the conformally coated Cit-Ni0.9Co0.1(OH)(x) overlayer passivates the redundant surface trap states of F-Fe2O3. These factors result in a superior photocurrent density of 2.52 mA cm(-2) at 1.23 V versus a reversible hydrogen electrode (V vs. RHE) for the target photoanode. Detailed investigation manifests that the hole extraction property in Cit-Ni0.9Co0.1(OH)(x) is mainly derived from the Ni sites, while Co incorporation endows the overlayer with more catalytic active sites. This synergistic effect between Ni and Co contributes to a rapid and continuous hole migration pathway from the bulk to the interface of the target photoanode, and then to the electrolyte for water oxidation.
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000684327200001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148980]
专题	石油化工学院
作者单位	1.Lanzhou Univ, State Key Lab Appl Organ Chem SKLAOC, Key Lab Catalyt Engn Gansu Prov, Coll Chem & Chem Engn, Lanzhou 730000, Gansu, Peoples R China; 2.Ningxia Univ, Coll Chem & Chem Engn, State Key Lab High Efficiency Utilizat Coal & Gre, Yinchuan 750021, Ningxia, Peoples R China; 3.Lanzhou Univ Technol, Coll Petrochem Technol, Langongping Rd 287, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Wang, Peng,Li, Feng,Long, Xuefeng,et al. Bifunctional citrate-Ni0.9Co0.1(OH)(x) layer coated fluorine-doped hematite for simultaneous hole extraction and injection towards efficient photoelectrochemical water oxidation[J]. NANOSCALE,2021,13(33):14197-14206.
APA	Wang, Peng.,Li, Feng.,Long, Xuefeng.,Wang, Tong.,Chai, Huan.,...&Jin, Jun.(2021).Bifunctional citrate-Ni0.9Co0.1(OH)(x) layer coated fluorine-doped hematite for simultaneous hole extraction and injection towards efficient photoelectrochemical water oxidation.NANOSCALE,13(33),14197-14206.
MLA	Wang, Peng,et al."Bifunctional citrate-Ni0.9Co0.1(OH)(x) layer coated fluorine-doped hematite for simultaneous hole extraction and injection towards efficient photoelectrochemical water oxidation".NANOSCALE 13.33(2021):14197-14206.