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Design aspects of all atomic layer deposited TiO2–Fe2O3 scaffold-absorber photoanodes for water splitting

Tutkimustuotosvertaisarvioitu

Standard

Design aspects of all atomic layer deposited TiO2–Fe2O3 scaffold-absorber photoanodes for water splitting. / Hiltunen, Arto; Ruoko, Tero-Petri; Iivonen, Tomi; Lahtonen, Kimmo; Ali-Löytty, Harri; Sarlin, Essi; Valden, Mika; Leskelä, Markku; Tkachenko, Nikolai.

julkaisussa: Sustainable Energy & Fuels, Vuosikerta 2, Nro 9, 31.07.2018, s. 2124-2130.

Tutkimustuotosvertaisarvioitu

Harvard

Hiltunen, A, Ruoko, T-P, Iivonen, T, Lahtonen, K, Ali-Löytty, H, Sarlin, E, Valden, M, Leskelä, M & Tkachenko, N 2018, 'Design aspects of all atomic layer deposited TiO2–Fe2O3 scaffold-absorber photoanodes for water splitting', Sustainable Energy & Fuels, Vuosikerta. 2, Nro 9, Sivut 2124-2130. https://doi.org/10.1039/C8SE00252E

APA

Vancouver

Hiltunen A, Ruoko T-P, Iivonen T, Lahtonen K, Ali-Löytty H, Sarlin E et al. Design aspects of all atomic layer deposited TiO2–Fe2O3 scaffold-absorber photoanodes for water splitting. Sustainable Energy & Fuels. 2018 heinä 31;2(9):2124-2130. https://doi.org/10.1039/C8SE00252E

Author

Hiltunen, Arto ; Ruoko, Tero-Petri ; Iivonen, Tomi ; Lahtonen, Kimmo ; Ali-Löytty, Harri ; Sarlin, Essi ; Valden, Mika ; Leskelä, Markku ; Tkachenko, Nikolai. / Design aspects of all atomic layer deposited TiO2–Fe2O3 scaffold-absorber photoanodes for water splitting. Julkaisussa: Sustainable Energy & Fuels. 2018 ; Vuosikerta 2, Nro 9. Sivut 2124-2130.

Bibtex - Lataa

@article{13994e5944e34c76a1fea1a40cde5e43,
title = "Design aspects of all atomic layer deposited TiO2–Fe2O3 scaffold-absorber photoanodes for water splitting",
abstract = "Iron and titanium oxides have attracted substantial attention in photoelectrochemical water splitting applications. However, both materials suffer from intrinsic limitations that constrain the final device performance. In order to overcome the limitations of the two materials alone, their combination has been proposed as a solution to the problems. Here we report on the fabrication of an atomic layer deposited (ALD) Fe2O3 coating on porous ALD-TiO2. Our results show that successful implementation requires complete mixing of the TiO2 and Fe2O3 layers via annealing resulting in the formation of a photoactive iron titanium oxide on the surface. Moreover, we found that incomplete mixing leads to crystallization of Fe2O3 to hematite that is detrimental to the photoelectrochemical performance. IPCE and transient photocurrent measurements performed using UV and visible light excitation confirmed that the iron titanium oxide extends the photocurrent generation to the visible range. These measurements were complemented by transient absorption spectroscopy (TAS), which revealed a new band absent in pristine hematite or anatase TiO2 that we assign to charge transfer within the structure. Taken together, these results provide design guidelines to be considered when aiming to combine TiO2 and Fe2O3 for photoelectrochemical applications.",
keywords = "Water splitting, Atomic layer deposition (ALD), Titanium dioxide, Hematite, Cellulose, Template",
author = "Arto Hiltunen and Tero-Petri Ruoko and Tomi Iivonen and Kimmo Lahtonen and Harri Ali-L{\"o}ytty and Essi Sarlin and Mika Valden and Markku Leskel{\"a} and Nikolai Tkachenko",
year = "2018",
month = "7",
day = "31",
doi = "10.1039/C8SE00252E",
language = "English",
volume = "2",
pages = "2124--2130",
journal = "Sustainable Energy & Fuels",
issn = "2398-4902",
publisher = "Royal Society of Chemistry",
number = "9",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Design aspects of all atomic layer deposited TiO2–Fe2O3 scaffold-absorber photoanodes for water splitting

AU - Hiltunen, Arto

AU - Ruoko, Tero-Petri

AU - Iivonen, Tomi

AU - Lahtonen, Kimmo

AU - Ali-Löytty, Harri

AU - Sarlin, Essi

AU - Valden, Mika

AU - Leskelä, Markku

AU - Tkachenko, Nikolai

PY - 2018/7/31

Y1 - 2018/7/31

N2 - Iron and titanium oxides have attracted substantial attention in photoelectrochemical water splitting applications. However, both materials suffer from intrinsic limitations that constrain the final device performance. In order to overcome the limitations of the two materials alone, their combination has been proposed as a solution to the problems. Here we report on the fabrication of an atomic layer deposited (ALD) Fe2O3 coating on porous ALD-TiO2. Our results show that successful implementation requires complete mixing of the TiO2 and Fe2O3 layers via annealing resulting in the formation of a photoactive iron titanium oxide on the surface. Moreover, we found that incomplete mixing leads to crystallization of Fe2O3 to hematite that is detrimental to the photoelectrochemical performance. IPCE and transient photocurrent measurements performed using UV and visible light excitation confirmed that the iron titanium oxide extends the photocurrent generation to the visible range. These measurements were complemented by transient absorption spectroscopy (TAS), which revealed a new band absent in pristine hematite or anatase TiO2 that we assign to charge transfer within the structure. Taken together, these results provide design guidelines to be considered when aiming to combine TiO2 and Fe2O3 for photoelectrochemical applications.

AB - Iron and titanium oxides have attracted substantial attention in photoelectrochemical water splitting applications. However, both materials suffer from intrinsic limitations that constrain the final device performance. In order to overcome the limitations of the two materials alone, their combination has been proposed as a solution to the problems. Here we report on the fabrication of an atomic layer deposited (ALD) Fe2O3 coating on porous ALD-TiO2. Our results show that successful implementation requires complete mixing of the TiO2 and Fe2O3 layers via annealing resulting in the formation of a photoactive iron titanium oxide on the surface. Moreover, we found that incomplete mixing leads to crystallization of Fe2O3 to hematite that is detrimental to the photoelectrochemical performance. IPCE and transient photocurrent measurements performed using UV and visible light excitation confirmed that the iron titanium oxide extends the photocurrent generation to the visible range. These measurements were complemented by transient absorption spectroscopy (TAS), which revealed a new band absent in pristine hematite or anatase TiO2 that we assign to charge transfer within the structure. Taken together, these results provide design guidelines to be considered when aiming to combine TiO2 and Fe2O3 for photoelectrochemical applications.

KW - Water splitting

KW - Atomic layer deposition (ALD)

KW - Titanium dioxide

KW - Hematite

KW - Cellulose

KW - Template

U2 - 10.1039/C8SE00252E

DO - 10.1039/C8SE00252E

M3 - Article

VL - 2

SP - 2124

EP - 2130

JO - Sustainable Energy & Fuels

JF - Sustainable Energy & Fuels

SN - 2398-4902

IS - 9

ER -