Hematite photoanodes for solar water splitting: Directly sputtered vs. anodically oxidized sputtered Fe

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F17%3A73581928" target="_blank" >RIV/61989592:15310/17:73581928 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22310/17:43914898

Result on the web

<a href="http://www.sciencedirect.com/science/article/pii/S0920586116308410?via%3Dihub" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0920586116308410?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cattod.2016.12.022" target="_blank" >10.1016/j.cattod.2016.12.022</a>

Result language

angličtina

Original language name

Hematite photoanodes for solar water splitting: Directly sputtered vs. anodically oxidized sputtered Fe

Original language description

Hematite iron oxide has been extensively studied for photoelectrochemical (PEC) water splitting. Nanostructuring of hematite-based photoanodes represents an effective strategy to supress the negative impact of a short diffusion length of photoexcited holes on the PEC performance. Here we present a comparative structural and photoelectrochemical study of hematite photoanodes fabricated in the forms of two-dimensional (2D) very thin (similar to 25 nm) nanocrystaline films and one-dimensional (1D) nanostructures including nanotubes and nanorods. Hematite films on fluorine-doped tin oxide (FTO) coated glass were prepared by two methods (i) by reactive high-power impulse magnetron sputtering (HiPIMS) and (ii) by anodic oxidation of Fe films deposited on FTO by HiPIMS. While in the first case very thin, dense, compact hematite films were deposited, the second approach yielded transparent nanotubular or nanorod hematite nanostructures. In both cases, the photoelectrochemical response was crucially influenced by the post thermal treatment at 750 degrees C resulting in the Sn4+ diffusion from the FTO substrate and the improvement of conductivity across the FTO/Fe2O3 interface. Fe2O3 films exhibit a photocurrent onset at potential 1.1 V (RHE) with almost linear increase of photocurrent with applied potential. The highest photocurrents were obtained for planar thin hematite electrodes prepared directly by HIPIMS technique (0.55 mA cm(-2) at 0.5 V vs. Ag/AgCl). The observed minimal bias for photoelectrochemical water splitting with hematite photoanode was 1.25 V. For applied potential 0.25 V (vs. Ag/AgCl) and bias 1.3 V, the observed photocurrent density and hydrogen production rate was 0.305 mA/cm(2) and 5.8 mu mol/h/cm(2), respectively.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

<a href="/en/project/GA15-19705S" target="_blank" >GA15-19705S: Advanced self-organized nanoarchitectures grown from magnetron co-sputtered metal alloys for photonic applications</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Catalysis Today

ISSN

0920-5861

e-ISSN

—

Volume of the periodical

287

Issue of the periodical within the volume

JUN

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

7

Pages from-to

99-105

UT code for WoS article

000399006100016

EID of the result in the Scopus database

2-s2.0-85009375041