气候变化领域集成服务门户(CCPortal): Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineering

CCPortal

DOI	10.1039/c7ee01475a
	Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineering
	Tang P.; Xie H.; Ros C.; Han L.; Biset-Peiró M.; He Y.; Kramer W.; Rodríguez A.P.; Saucedo E.; Galán-Mascarós J.R.; Andreu T.; Morante J.R.; Arbiol J.
发表日期	2017
ISSN	17545692
起始页码	2124
结束页码	2136
卷号	10 期号:10
英文摘要	The optimization of multiple interfaces in hematite (α-Fe2O3) based composites for photoelectrochemical water splitting to facilitate charge transport in the bulk is of paramount importance to obtain enhanced solar-to-fuel efficiency. Herein, we report the fabrication of ITO/Fe2O3/Fe2TiO5/FeNiOOH multi-layer nanowires and a series of systematic experiments designed to elucidate the mechanism underlying the interfacial coupling effect of the quaternary hematite composite. The hierarchical ITO/Fe2O3/Fe2TiO5/FeNiOOH nanowires display photocurrents that are more than an order of magnitude greater than those of pristine Fe2O3 nanowires (from 0.205 mA cm-2 to 2.2 mA cm-2 at 1.23 V vs. RHE and 1 Sun), and higher than those of most of the recently reported state-of-the-art hematite composites. Structural, compositional and electrochemical investigations disclose that the surface states (SS) are finely regulated via the atomic addition of an Fe2TiO5 layer and FeNiOOH nanodots, while the upgrading of back contact conductivity and charge donor densities originate from the epitaxial relationship and enhanced Sn doping contributed from the ITO underlayer. We attribute the superior water oxidation performance to the interfacial coupling effect of the ITO underlayer (Sn doping and back contact conductivity promoter), the atomic level Fe2TiO5 coating (Ti doping, surface state density and energy level modulation) and the FeNiOOH nanodot electrocatalyst (regulating surface state energy level). Our work suggests an effective pathway for rational designing of highly active and cost-effective integrated photoanodes for photoelectrochemical water splitting. © The Royal Society of Chemistry.
英文关键词	Cost effectiveness; Electrocatalysts; Electrochemistry; Nanowires; Surface states; Tin; Electrochemical investigations; Epitaxial relationships; Interfacial couplings; Multilayer nanowires; Photoelectrochemical water splitting; Surface state density; Surface-state energies; Systematic experiment; Hematite; catalyst; composite; electric field; electrochemical method; hematite; iron; nanoparticle; optimization; photochemistry; titanium; water
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190402
作者单位	Catalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, Sant Adria del Besos, Catalonia, Barcelona, 08930, Spain; Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, Barcelona Institute of Science and Technology (BIST), Campus UAB Bellaterra, Barcelona Catalonia, 08193, Spain; Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Avinguda Paisos Catalans 16, Tarragona, Catalonia, 43007, Spain; School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China; Beckman Institute, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, United States; ICREA, Pg. Lluís Companys 23, Barcelona Catalonia, 08010, Spain
推荐引用方式 GB/T 7714	Tang P.,Xie H.,Ros C.,et al. Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineering[J],2017,10(10).
APA	Tang P..,Xie H..,Ros C..,Han L..,Biset-Peiró M..,...&Arbiol J..(2017).Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineering.Energy & Environmental Science,10(10).
MLA	Tang P.,et al."Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineering".Energy & Environmental Science 10.10(2017).